5.2-RELEASE TODO

Robert Watson rwatson at FreeBSD.org
Sat Nov 29 07:15:20 PST 2003


  [NOTE: This is being resent due to a cvs update error that caused
   an un-updated version of the TODO list to be sent out earlier]

This is an automated bi-weekly mailing of the FreeBSD 5.2 open issues list.
The live version of this list is available at:

    http://www.FreeBSD.org/releases/5.2R/todo.html

Automated mailing of this list will continue through the release of
FreeBSD 5.2.


                          FreeBSD 5.2 Open Issues

                                Open Issues

 This is a list of open issues that need to be resolved for FreeBSD 5.2. If
 you have any updates for this list, please e-mail re at FreeBSD.org.

Show stopper defects for 5.2-RELEASE

 +------------------------------------------------------------------------+
 |   Issue   |  Status   |Responsible |            Description            |
 |-----------+-----------+------------+-----------------------------------|
 |Panic when |           |            |                                   |
 |rebuilding |Not done   |--          |The panic reported in PR kern/58228|
 |ata-raid   |           |            |must be fixed.                     |
 |arrays     |           |            |                                   |
 |-----------+-----------+------------+-----------------------------------|
 |           |           |            |Kris Kennaway reports that Alpha   |
 |pipe/VM    |           |            |packages builds are being silently |
 |corruption |Not done   |--          |corrupted and suspects pipe and vm |
 |on Alpha   |           |            |issues. This must be investigated  |
 |           |           |            |and resolved.                      |
 |-----------+-----------+------------+-----------------------------------|
 |           |           |            |panic: Assertion td->td_turnstile  |
 |           |           |            |!= NULL failed at                  |
 |           |           |            |../../../kern/subr_turnstile.c:427 |
 |           |           |            |has been affecting several users on|
 |           |           |            |multiple platforms. Note: further  |
 |Turnstile  |           |            |research indicates that these      |
 |assertion  |In progress|John Baldwin|panics tend to be "double panics"  |
 |failure    |           |            |that are a side effect of the      |
 |           |           |            |turnstile code in the context of an|
 |           |           |            |existing panic. Reporters of this  |
 |           |           |            |panic should make sure to include a|
 |           |           |            |full stack trace so that it's clear|
 |           |           |            |if a second panic is also present. |
 |-----------+-----------+------------+-----------------------------------|
 |           |           |            |The new i386 interrupt code        |
 |ACPI kernel|           |            |requires that ACPI be compiled into|
 |module     |In progress|John Baldwin|the kernel if it to be used. Work  |
 |           |           |            |is underway to restore the ability |
 |           |           |            |to load it as a module.            |
 |-----------+-----------+------------+-----------------------------------|
 |           |           |            |There have been a number of reports|
 |Reported   |           |            |of NFS clients and server hangs.   |
 |NFS        |In progress|            |Unfortunately, these are difficult |
 |failures   |           |            |to reproduce, and have not yet been|
 |           |           |            |traced back to a particular change |
 |           |           |            |or reliable reproduction scenario. |
 +------------------------------------------------------------------------+

Required features for 5.2-RELEASE

 +------------------------------------------------------------------------+
 |      Issue      |   Status    | Responsible |       Description        |
 |-----------------+-------------+-------------+--------------------------|
 |                 |             |             | Kernel and userland bits |
 | KSE support for |             | Jake        | are implemented but      |
 | sparc64         | In progress | Burkholder  | untested and known to be |
 |                 |             |             | incomplete. Required for |
 |                 |             |             | 5.2-RELEASE.             |
 |-----------------+-------------+-------------+--------------------------|
 |                 |             |             | Userland bits            |
 | KSE support for |             | Marcel      | implemented, kernel bits |
 | alpha           | In progress | Moolenaar   | not implemented.         |
 |                 |             |             | Required for             |
 |                 |             |             | 5.2-RELEASE.             |
 |-----------------+-------------+-------------+--------------------------|
 |                 |             |             | Significant parts of the |
 |                 |             |             | network stack            |
 |                 |             |             | (especially IPv4 and     |
 |                 |             |             | IPv6) now have           |
 |                 |             |             | fine-grained locking of  |
 |                 |             |             | their data structures.   |
 |                 |             |             | However, it is not yet   |
 |                 |             |             | possible for the netisr  |
 |                 |             |             | threads to run without   |
 | Fine-grained    |             |             | Giant, due to            |
 | network stack   | In progress | Sam Leffler | dependencies on sockets, |
 | locking without |             |             | routing, etc. A          |
 | Giant           |             |             | 5.2-RELEASE goal is to   |
 |                 |             |             | have the network stack   |
 |                 |             |             | running largely without  |
 |                 |             |             | Giant, which should      |
 |                 |             |             | substantially improve    |
 |                 |             |             | performance of the       |
 |                 |             |             | stack, as well as other  |
 |                 |             |             | system components by     |
 |                 |             |             | reducing contention on   |
 |                 |             |             | Giant.                   |
 +------------------------------------------------------------------------+

Desired features for 5.2-RELEASE

 +------------------------------------------------------------------------+
 |       Issue        |    Status     |  Responsible   |   Description    |
 |--------------------+---------------+----------------+------------------|
 |                    |               |                | FAST_IPSEC       |
 |                    |               |                | currently cannot |
 |                    |               |                | be used directly |
 |                    |               |                | with the KAME    |
 |                    |               |                | IPv6             |
 |                    |               |                | implementation,  |
 |                    |               |                | requiring an     |
 |                    |               |                | additional level |
 |                    |               |                | of IP tunnel     |
 |                    |               |                | indirection to   |
 |                    |               |                | protect IPv6     |
 |                    |               |                | packets when     |
 |                    |               |                | using hardware   |
 |                    |               |                | crypto           |
 | FAST_IPSEC and     |               |                | acceleration.    |
 | KAME compatibility | Not done      | --             | This issue must  |
 |                    |               |                | be resolved so   |
 |                    |               |                | that the two     |
 |                    |               |                | services may     |
 |                    |               |                | more easily be   |
 |                    |               |                | used together.   |
 |                    |               |                | Among other      |
 |                    |               |                | things, this     |
 |                    |               |                | will require a   |
 |                    |               |                | careful review   |
 |                    |               |                | of the handling  |
 |                    |               |                | of mbuf header   |
 |                    |               |                | copying and      |
 |                    |               |                | m_tag support in |
 |                    |               |                | the KAME IPv6    |
 |                    |               |                | code.            |
 |--------------------+---------------+----------------+------------------|
 |                    |               |                | The FreeBSD KAME |
 |                    |               |                | IPv6 code is now |
 |                    |               |                | substantially    |
 |                    |               |                | dated with       |
 |                    |               |                | respect to the   |
 |                    |               |                | KAME vendor      |
 | KAME               | In progress   | Hajimu UMEMOTO | source. The      |
 | Synchronization    |               |                | FreeBSD Project  |
 |                    |               |                | needs to take    |
 |                    |               |                | initiative in    |
 |                    |               |                | driving the      |
 |                    |               |                | merge of new bug |
 |                    |               |                | fixes, features, |
 |                    |               |                | et al.           |
 |--------------------+---------------+----------------+------------------|
 |                    |               |                | Almost all       |
 |                    |               |                | process          |
 |                    |               |                | debugging tools  |
 |                    |               |                | have been        |
 |                    |               |                | updated to use   |
 |                    |               |                | non-procfs       |
 |                    |               |                | kernel           |
 |                    |               |                | primitives, with |
 |                    |               |                | the exception of |
 |                    |               |                | truss(1). As     |
 |                    |               |                | procfs is        |
 |                    |               |                | considered       |
 |                    |               |                | deprecated due   |
 | truss support for  |               |                | to its inherent  |
 | ptrace             | In progress   | Robert Drehmel | security risks,  |
 |                    |               |                | it is highly     |
 |                    |               |                | desirable to     |
 |                    |               |                | update truss to  |
 |                    |               |                | operate in a     |
 |                    |               |                | post-procfs      |
 |                    |               |                | world.           |
 |                    |               |                | Dag-Erling       |
 |                    |               |                | Smorgrav had     |
 |                    |               |                | prototype        |
 |                    |               |                | patches;         |
 |                    |               |                | Robert Drehmel   |
 |                    |               |                | is developing    |
 |                    |               |                | and testing      |
 |                    |               |                | patches now.     |
 |--------------------+---------------+----------------+------------------|
 |                    |               |                | Apple's Darwin   |
 |                    |               |                | operating system |
 |                    |               |                | has fairly       |
 |                    |               |                | extensive        |
 | Merge of Darwin    |               |                | improvements to  |
 | msdosfs, other     | Not done      | --             | msdosfs and      |
 | fixes              |               |                | other kernel     |
 |                    |               |                | services; these  |
 |                    |               |                | fixes must be    |
 |                    |               |                | reviewed and     |
 |                    |               |                | merged to the    |
 |                    |               |                | FreeBSD tree.    |
 |--------------------+---------------+----------------+------------------|
 |                    |               |                | Productionable   |
 |                    |               |                | support for the  |
 |                    |               |                | AMD64 platform.  |
 |                    |               |                | It currently     |
 |                    |               |                | meets most of    |
 | Tier-1 Support for | In progress   | Peter Wemm,    | the requirements |
 | AMD64 Hammer       |               | David O'Brien  | for the Tier-1   |
 |                    |               |                | classification,  |
 |                    |               |                | but a formal     |
 |                    |               |                | ruling must be   |
 |                    |               |                | made in time for |
 |                    |               |                | 5.2-RELEASE.     |
 |--------------------+---------------+----------------+------------------|
 |                    |               |                | Kernel modules   |
 |                    |               |                | are currently    |
 |                    |               |                | built            |
 |                    |               |                | independently    |
 |                    |               |                | from a kernel    |
 |                    |               |                | configuration,   |
 |                    |               |                | and              |
 |                    |               |                | independently    |
 |                    |               |                | from one         |
 |                    |               |                | another,         |
 |                    |               |                | resulting in     |
 |                    |               |                | substantially    |
 |                    |               |                | redundant        |
 |                    |               |                | compilation of   |
 |                    |               |                | objects, as well |
 |                    |               |                | as the inability |
 |                    |               |                | to easily manage |
 |                    |               |                | compile-time     |
 |                    |               |                | options for      |
 |                    |               |                | kernel objects   |
 |                    |               |                | (such as MAC,    |
 | Revised kld build  | Not done      | --             | PAE, etc) that   |
 | infrastructure     |               |                | may require      |
 |                    |               |                | conditional      |
 |                    |               |                | compilation in   |
 |                    |               |                | the kernel       |
 |                    |               |                | modules. In      |
 |                    |               |                | order to improve |
 |                    |               |                | build            |
 |                    |               |                | performance and  |
 |                    |               |                | better support   |
 |                    |               |                | options of this  |
 |                    |               |                | sort, the KLD    |
 |                    |               |                | build            |
 |                    |               |                | infrastructure   |
 |                    |               |                | needs to be      |
 |                    |               |                | revamped. Peter  |
 |                    |               |                | Wemm has done    |
 |                    |               |                | some initial     |
 |                    |               |                | prototyping, and |
 |                    |               |                | should be        |
 |                    |               |                | contacted before |
 |                    |               |                | starting on this |
 |                    |               |                | work.            |
 |--------------------+---------------+----------------+------------------|
 |                    |               |                | Currently, there |
 |                    |               |                | are two classes  |
 |                    |               |                | of interrupt     |
 |                    |               |                | handlers in 5.x: |
 |                    |               |                | fast interrupt   |
 |                    |               |                | handlers which   |
 |                    |               |                | run entirely in  |
 |                    |               |                | interrupt        |
 |                    |               |                | context, and     |
 |                    |               |                | heavy-weight     |
 |                    |               |                | handlers which   |
 |                    |               |                | execute in a     |
 |                    |               |                | full-weight      |
 |                    |               |                | kernel interrupt |
 |                    |               |                | thread. It is    |
 |                    |               |                | possible to      |
 |                    |               |                | optimize         |
 |                    |               |                | interrupt thread |
 |                    |               |                | context          |
 |                    |               |                | management such  |
 |                    |               |                | that a           |
 |                    |               |                | light-weight     |
 |                    |               |                | context switch   |
 |                    |               |                | is performed to  |
 |                    |               |                | begin execution  |
 |                    |               |                | of the interrupt |
 |                    |               |                | thread in the    |
 |                    |               |                | handler context, |
 |                    |               |                | and only when a  |
 |                    |               |                | full-weight      |
 | Light-weight       |               |                | context is       |
 | interrupt threads, | Not done      | --             | required (such   |
 | context switches   |               |                | as sleeping on a |
 |                    |               |                | lock) is that    |
 |                    |               |                | cost required.   |
 |                    |               |                | This             |
 |                    |               |                | optimization     |
 |                    |               |                | should           |
 |                    |               |                | substantially    |
 |                    |               |                | improve          |
 |                    |               |                | interrupt        |
 |                    |               |                | latency. There   |
 |                    |               |                | are also         |
 |                    |               |                | additional       |
 |                    |               |                | kernel thread    |
 |                    |               |                | context switch   |
 |                    |               |                | optimizations    |
 |                    |               |                | that can be made |
 |                    |               |                | to improve the   |
 |                    |               |                | performance of   |
 |                    |               |                | thread workers   |
 |                    |               |                | in the kernel,   |
 |                    |               |                | such as found in |
 |                    |               |                | the network      |
 |                    |               |                | stack, crypto    |
 |                    |               |                | worker threads,  |
 |                    |               |                | and GEOM. Bosko  |
 |                    |               |                | Milekic has done |
 |                    |               |                | substantial      |
 |                    |               |                | prototyping      |
 |                    |               |                | work, and should |
 |                    |               |                | be coordinated   |
 |                    |               |                | with.            |
 |--------------------+---------------+----------------+------------------|
 |                    |               |                | Currently, gbde  |
 |                    |               |                | must be manually |
 |                    |               |                | configured at    |
 |                    |               |                | run-time each    |
 |                    |               |                | time an          |
 |                    |               |                | encrypted disk   |
 |                    |               |                | device is        |
 |                    |               |                | mounted. This    |
 |                    |               |                | prevents easy    |
 | Run-time           |               |                | integration into |
 | autoconfiguration  |               |                | /etc/fstab and   |
 | of GBDE and        | Not done      | --             | easy automated   |
 | related transforms |               |                | deployment.      |
 |                    |               |                | Improved         |
 |                    |               |                | integration with |
 |                    |               |                | the              |
 |                    |               |                | configuration,   |
 |                    |               |                | mounting, and    |
 |                    |               |                | boot process is  |
 |                    |               |                | required to make |
 |                    |               |                | this feature     |
 |                    |               |                | more easily      |
 |                    |               |                | accessible.      |
 |--------------------+---------------+----------------+------------------|
 |                    |               |                | A process cannot |
 |                    |               |                | be interrupted   |
 |                    |               |                | while waiting on |
 |                    |               |                | a lock. Fixing   |
 |                    |               |                | this requires    |
 | rpc.lockd(8)       | In progress   | Robert Watson  | that the RPC     |
 | stability          |               |                | code be taught   |
 |                    |               |                | how to deal with |
 |                    |               |                | lock             |
 |                    |               |                | cancellation and |
 |                    |               |                | interruption     |
 |                    |               |                | events.          |
 |--------------------+---------------+----------------+------------------|
 |                    |               |                | Truss appears to |
 |                    |               |                | contain a race   |
 |                    |               |                | condition during |
 |                    |               |                | the start-up of  |
 |                    |               |                | debugging, which |
 |                    |               |                | can result in    |
 |                    |               |                | truss failing to |
 |                    |               |                | attach to the    |
 |                    |               |                | process before   |
 |                    |               |                | it exits. The    |
 |                    |               |                | symptom is that  |
 |                    |               |                | truss reports    |
 |                    |               |                | that it cannot   |
 |                    |               |                | open the procfs  |
 |                    |               |                | node supporting  |
 |                    |               |                | the process      |
 |                    |               |                | being debugged.  |
 |                    |               |                | A bug also       |
 |                    |               |                | appears to exist |
 | Race conditions in | Errata        |                | where in truss   |
 | truss              | candidate     | Robert Drehmel | will hang if     |
 |                    |               |                | execve() returns |
 |                    |               |                | ENOENT. A        |
 |                    |               |                | further race     |
 |                    |               |                | appears to exist |
 |                    |               |                | in which truss   |
 |                    |               |                | will return      |
 |                    |               |                | "PIOCWAIT:       |
 |                    |               |                | Input/output     |
 |                    |               |                | error"           |
 |                    |               |                | occasionally on  |
 |                    |               |                | startup. The fix |
 |                    |               |                | for this         |
 |                    |               |                | sufficiently     |
 |                    |               |                | changes process  |
 |                    |               |                | execution        |
 |                    |               |                | handling that we |
 |                    |               |                | will defer the   |
 |                    |               |                | fix to post-5.0  |
 |                    |               |                | and consider     |
 |                    |               |                | this errata.     |
 |--------------------+---------------+----------------+------------------|
 | gdb -k support for | Not done      | Mark Peek      | gdb -k doesn't   |
 | alpha              |               |                | work on alpha    |
 |--------------------+---------------+----------------+------------------|
 |                    |               |                | Currently, MAC   |
 |                    |               |                | protections are  |
 |                    |               |                | enforced only on |
 |                    |               |                | locally          |
 |                    |               |                | originated file  |
 |                    |               |                | system           |
 |                    |               |                | operations       |
 |                    |               |                | (VOPs), and not  |
 |                    |               |                | on RPCs          |
 |                    |               |                | generated via    |
 |                    |               |                | the NFS server.  |
 |                    |               |                | Improvements in  |
 | MAC support for    |               |                | NFS server       |
 | NFS Server         | Not done      | Robert Watson  | credential       |
 |                    |               |                | handling are     |
 |                    |               |                | required to      |
 |                    |               |                | correct this     |
 |                    |               |                | problem, as well |
 |                    |               |                | as the           |
 |                    |               |                | introduction of  |
 |                    |               |                | new entry points |
 |                    |               |                | to properly      |
 |                    |               |                | label NFS        |
 |                    |               |                | credentials and  |
 |                    |               |                | perform          |
 |                    |               |                | enforcement      |
 |                    |               |                | properly.        |
 |--------------------+---------------+----------------+------------------|
 |                    |               |                | All PCI drivers  |
 |                    |               |                | must use busdma  |
 |                    |               |                | for DMA; no use  |
 |                    |               |                | of vtophys()     |
 | busdma in all PCI  | In progress   | --             | will be          |
 | drivers            |               |                | permitted for    |
 |                    |               |                | any recent       |
 |                    |               |                | device driver.   |
 |                    |               |                | ISA drivers may  |
 |                    |               |                | be exempt.       |
 |--------------------+---------------+----------------+------------------|
 |                    |               |                | With improved    |
 |                    |               |                | support for      |
 |                    |               |                | threading        |
 |                    |               |                | primitives,      |
 |                    |               |                | support is now   |
 |                    |               |                | required to ease |
 |                    |               |                | debugging of     |
 | GDB thread support | In progress   | Glenn Gombert  | threaded         |
 |                    |               |                | applications.    |
 |                    |               |                | Ideally, this    |
 |                    |               |                | support will     |
 |                    |               |                | work for both    |
 |                    |               |                | libthr and       |
 |                    |               |                | libkse threading |
 |                    |               |                | models.          |
 |--------------------+---------------+----------------+------------------|
 |                    |               |                | Prebinding       |
 |                    |               |                | reduces          |
 |                    |               |                | executable       |
 |                    |               |                | startup time by  |
 |                    |               |                | lowering the     |
 |                    |               |                | expense of       |
 |                    |               |                | symbol lookup,   |
 |                    |               |                | binding and      |
 |                    |               |                | relocation. This |
 |                    |               |                | is accomplished  |
 |                    |               |                | by a prebinding  |
 |                    |               |                | data file or ELF |
 |                    |               |                | segment that     |
 |                    |               |                | contains         |
 |                    |               |                | intermediate     |
 |                    |               |                | lookup results   |
 |                    |               |                | allowing fast    |
 |                    |               |                | symbol binding   |
 |                    |               |                | and relocation,  |
 | Per object ELF     |               |                | provided that    |
 | Prebinding support | In progress   | Matthew Dodd   | dependent        |
 |                    |               |                | objects remain   |
 |                    |               |                | unchanged since  |
 |                    |               |                | the prebinding   |
 |                    |               |                | information was  |
 |                    |               |                | generated.       |
 |                    |               |                |                  |
 |                    |               |                | The benefits of  |
 |                    |               |                | prebinding are   |
 |                    |               |                | realized when    |
 |                    |               |                | running          |
 |                    |               |                | executables that |
 |                    |               |                | use a large      |
 |                    |               |                | (>10) number of  |
 |                    |               |                | shared           |
 |                    |               |                | libraries. C++   |
 |                    |               |                | applications     |
 |                    |               |                | also benefit as  |
 |                    |               |                | they contain a   |
 |                    |               |                | large number of  |
 |                    |               |                | relocations.     |
 |--------------------+---------------+----------------+------------------|
 |                    |               |                | The LOR reported |
 |                    |               |                | in PR kern/55175 |
 |                    |               |                | needs to be      |
 | filedesc LOR       | Not done      | --             | fixed. Filedesc  |
 |                    |               |                | locking needs to |
 |                    |               |                | be heavily       |
 |                    |               |                | reviewed in      |
 |                    |               |                | general.         |
 |--------------------+---------------+----------------+------------------|
 |                    |               |                | Brian Feldman    |
 |                    |               |                | has submitted    |
 |                    |               |                | patches to       |
 |                    |               |                | improve the      |
 |                    |               |                | consistency of   |
 |                    |               |                | the pathnames    |
 |                    |               |                | passed into the  |
 | MAC Framework      | In progress   | Robert Watson  | MAC Framework    |
 | devfs path fixes   |               |                | devfs labeling   |
 |                    |               |                | entry points.    |
 |                    |               |                | These patches    |
 |                    |               |                | need to be       |
 |                    |               |                | thoroughly       |
 |                    |               |                | reviewed and     |
 |                    |               |                | tested, then     |
 |                    |               |                | merged.          |
 |--------------------+---------------+----------------+------------------|
 |                    |               |                | Many systems     |
 |                    |               |                | supporting       |
 |                    |               |                | POSIX.1e ACLs    |
 |                    |               |                | permit a minor   |
 |                    |               |                | violation to     |
 |                    |               |                | that             |
 |                    |               |                | specification,   |
 |                    |               |                | in which the     |
 |                    |               |                | ACL_MASK entry   |
 |                    |               |                | overrides the    |
 | ACL_MASK override  |               |                | umask, rather    |
 | of umask support   | In progress   | Robert Watson  | than being       |
 | in UFS             |               |                | intersected with |
 |                    |               |                | it. The          |
 |                    |               |                | resulting        |
 |                    |               |                | semantics can be |
 |                    |               |                | useful in        |
 |                    |               |                | group-oriented   |
 |                    |               |                | environments,    |
 |                    |               |                | and as such      |
 |                    |               |                | would be very    |
 |                    |               |                | helpful on       |
 |                    |               |                | FreeBSD.         |
 |--------------------+---------------+----------------+------------------|
 |                    |               |                | Attempts to use  |
 |                    |               |                | make(1) with     |
 |                    |               |                | KQueues appears  |
 |                    |               |                | to result in a   |
 |                    |               |                | kernel hang      |
 |                    |               |                | under "heavy     |
 |                    |               |                | load". It would  |
 |                    |               |                | be desirable to  |
 |                    |               |                | fix this both    |
 |                    |               |                | from the         |
 | make -DUSE_KQUEUE  |               |                | perspective of   |
 | causes lockup with |               |                | building FreeBSD |
 | buildworld         | Needs testing |                | quickly as a     |
 | -jBIGNUM           |               |                | developer, but   |
 |                    |               |                | also because     |
 |                    |               |                | it's an          |
 |                    |               |                | instability that |
 |                    |               |                | could show up    |
 |                    |               |                | under other high |
 |                    |               |                | load and heavy   |
 |                    |               |                | use of KQueues.  |
 |                    |               |                | See PR           |
 |                    |               |                | kern/57945 for a |
 |                    |               |                | proposed patch   |
 |                    |               |                | and details.     |
 +------------------------------------------------------------------------+

Documentation items desired for 5.2

 +------------------------------------------------------------------------+
 |     Issue     |   Status    | Responsible  |        Description        |
 |---------------+-------------+--------------+---------------------------|
 |               |             |              | The Early Adopters Guide  |
 |               |             |              | needs to be revised,      |
 | Revise EAG    | In progress | Bruce A. Mah | hopefully for the last    |
 |               |             |              | time, to reflect the      |
 |               |             |              | state of 5.2.             |
 |---------------+-------------+--------------+---------------------------|
 |               |             |              | Ongoing project to remove |
 |               |             |              | redundancy in             |
 | Trim Hardware |             |              | documentation by removing |
 | Notes         | In progress | Bruce A. Mah | lists of specific devices |
 |               |             |              | from the hardware notes   |
 |               |             |              | and pointing readers to   |
 |               |             |              | driver manpages.          |
 +------------------------------------------------------------------------+

Testing focuses for 5.2-RELEASE

 +------------------------------------------------------------------------+
 |     Issue      |   Status    |Responsible |        Description         |
 |----------------+-------------+------------+----------------------------|
 |                |             |            |The PCM audio framework and |
 |                |             |            |device drivers have been    |
 |                |             |            |locked and free of Giant for|
 |PCM locking and |             |            |quite a while, but LOR      |
 |performance     |Needs testing|--          |problems persist along with |
 |issues          |             |            |reports of poor audio       |
 |                |             |            |performance under load.     |
 |                |             |            |These problems are believed |
 |                |             |            |to have been corrected, but |
 |                |             |            |more testing is desired.    |
 |----------------+-------------+------------+----------------------------|
 |ATA driver      |             |            |New ATA model has arrived,  |
 |structural      |             |So/ren      |supporting fine-grained     |
 |improvements,   |Needs testing|Schmidt     |locking, and more. Much     |
 |MPsafety        |             |            |testing is needed to ensure |
 |                |             |            |no regressions.             |
 |----------------+-------------+------------+----------------------------|
 |                |             |            |Sysinstall and libdisk has  |
 |GPT support for |Needs testing|Marcel      |been overhauled to support  |
 |sysinstall      |             |Moolenaar   |the GPT partition scheme    |
 |                |             |            |used on ia64.               |
 |----------------+-------------+------------+----------------------------|
 |                |             |            |Interrupt routing on ia32   |
 |                |             |            |has been completely         |
 |                |             |            |re-written to support ACPI  |
 |                |             |            |hints for PCI interrupt     |
 |Complete the    |             |            |routing, along with ACPI    |
 |APIC PCI        |             |            |hints for CPU enumeration.  |
 |interrupt       |Needs testing|John Baldwin|There have been reports of  |
 |routing support |             |            |interrupt storms or a       |
 |                |             |            |failure for interrupts to   |
 |                |             |            |deliver, possibly a result  |
 |                |             |            |of bad ACPI information.    |
 |                |             |            |These problems need to be   |
 |                |             |            |tracked down and resolved.  |
 |----------------+-------------+------------+----------------------------|
 |                |             |            |Performing a crashdump on an|
 |ATAng crashdump |             |So/ren      |ATA device can result in a  |
 |causes disk     |Needs testing|Schmidt, Tor|corrupted MBR record. Tor   |
 |corruption      |             |Egge        |has a possible patch for    |
 |                |             |            |this.                       |
 |----------------+-------------+------------+----------------------------|
 |                |             |            |The ACPI code registers     |
 |                |             |            |eventhandlers that are not  |
 |                |             |            |unregistered when ACPI shuts|
 |SMP users report|             |            |down during system shutdown.|
 |acpi_cpu panic  |Needs testing|Nate Lawson |The result can be a panic   |
 |during shutdown |             |            |during shutdown. Nate is    |
 |                |             |            |circulating a patch that is |
 |                |             |            |believed to correct this    |
 |                |             |            |problem.                    |
 |----------------+-------------+------------+----------------------------|
 |                |             |            |There are reports of witness|
 |                |             |            |panics in                   |
 |                |             |            |random_harvest_internal()   |
 |                |             |            |due to last minute changes  |
 |                |             |            |in interrupt entropy        |
 |random_harvest  |             |            |harvesting code. Systems    |
 |panic           |Needs testing|Mark Murray |running with INVARIANTS will|
 |                |             |            |rapidly panic. Update: a    |
 |                |             |            |workaround has been         |
 |                |             |            |committed, but the original |
 |                |             |            |change must either be backed|
 |                |             |            |out or revised before we can|
 |                |             |            |cut the first beta.         |
 |----------------+-------------+------------+----------------------------|
 |                |             |            |In the last week, reports of|
 |                |             |            |two new (and possibly       |
 |                |             |            |related) Vinum failures have|
 |                |             |            |come to light: a warning    |
 |                |             |            |message of vinum: exiting   |
 |                |             |            |with malloc table           |
 |Vinum data      |             |            |inconsistency at 0xc2053c00 |
 |corruption and  |             |            |from vinumio.c:755 has been |
 |memory          |Needs testing|Greg Lehey  |experienced when Vinum      |
 |allocation      |             |            |auto-configuration fails.   |
 |problems        |             |            |Also, even simple test cases|
 |                |             |            |for Vinum I/O appear to     |
 |                |             |            |result in incorrect data    |
 |                |             |            |being returned from disk,   |
 |                |             |            |rendering Vinum unusable in |
 |                |             |            |several reproduceable       |
 |                |             |            |configurations.             |
 +------------------------------------------------------------------------+

   ----------------------------------------------------------------------

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