5.2-RELEASE TODO

Robert Watson rwatson at FreeBSD.org
Tue Jul 1 07:00:55 PDT 2003


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.

Must Resolve Issues for 5.2-RELEASE

 +------------------------------------------------------------------------+
 |        Issue        |  Status  |   Responsible   |     Description     |
 |---------------------+----------+-----------------+---------------------|
 |                     |          |                 | KSE M:N threading   |
 |                     |          |                 | support is reaching |
 |                     |          |                 | experimental yet    |
 |                     |          | Julian          | usable status on    |
 | Production-quality  | In       | Elischer, David | i386 for            |
 | M:N threading       | progress | Xu, Daniel      | 5.1-RELEASE. M:N    |
 |                     |          | Eischen         | threading should be |
 |                     |          |                 | productionable and  |
 |                     |          |                 | usable on all       |
 |                     |          |                 | platforms by        |
 |                     |          |                 | 5.2-RELEASE.        |
 |---------------------+----------+-----------------+---------------------|
 |                     |          |                 | Currently, the MD   |
 |                     |          |                 | elements of KSE are |
 |                     |          |                 | present only for    |
 |                     |          |                 | the i386 platform,  |
 |                     |          |                 | limiting use of KSE |
 |                     |          |                 | to the i386         |
 |                     |          |                 | platform. It is     |
 |                     |          |                 | highly desirable to |
 | KSE support for     |          | Jake            | make KSE available  |
 | sparc64, alpha,     | --       | Burkholder, --, | on non-i386         |
 | ia64                |          | --              | platforms for       |
 |                     |          |                 | 5.2-RELEASE so that |
 |                     |          |                 | KSE can see more    |
 |                     |          |                 | broad exposure, and |
 |                     |          |                 | the performance     |
 |                     |          |                 | benefits of KSE can |
 |                     |          |                 | be visible to users |
 |                     |          |                 | of the 64-bit       |
 |                     |          |                 | FreeBSD             |
 |                     |          |                 | architectures.      |
 |---------------------+----------+-----------------+---------------------|
 |                     |          |                 | Kris Kennaway       |
 |                     |          |                 | reports high        |
 |                     |          |                 | instability of      |
 |                     |          |                 | 5-CURRENT on ia64   |
 |                     | In       | Marcel          | machines, such as   |
 | ia64 stability      | Progress | Moolenaar       | the pluto*          |
 |                     |          |                 | machines. These     |
 |                     |          |                 | problems need to be |
 |                     |          |                 | fixed in order to   |
 |                     |          |                 | get a successful    |
 |                     |          |                 | package build.      |
 |---------------------+----------+-----------------+---------------------|
 |                     |          |                 | ia64 serial console |
 |                     |          |                 | support is reported |
 |                     |          |                 | to not be           |
 |                     |          |                 | functional on HP    |
 |                     | In       | Marcel          | Itanium2 platforms. |
 | ia64 sio support    | progress | Moolenaar,      | A reworking of the  |
 |                     |          | Warner Losh     | sio driver to       |
 |                     |          |                 | improve platform    |
 |                     |          |                 | independence and    |
 |                     |          |                 | bus handling is     |
 |                     |          |                 | likely needed.      |
 |---------------------+----------+-----------------+---------------------|
 |                     |          |                 | 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 KAME | --       | --              | acceleration. This  |
 | compatibility       |          |                 | 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                |          |                 | KAME vendor source. |
 | Synchronization     | --       | --              | The 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 to   |
 | truss support for   | In       |                 | its inherent        |
 | ptrace              | 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      | --       | --              | msdosfs and other   |
 | fixes               |          |                 | kernel services;    |
 |                     |          |                 | these fixes must be |
 |                     |          |                 | reviewed and merged |
 |                     |          |                 | to the FreeBSD      |
 |                     |          |                 | tree.               |
 |---------------------+----------+-----------------+---------------------|
 |                     |          |                 | Port syscons to     |
 |                     |          |                 | sparc64. Add device |
 |                     |          |                 | drivers for sun     |
 |                     |          |                 | mice and keyboards. |
 |                     |          |                 | Allow for more than |
 | sparc64 adaptation  | In       |                 | 3 bits of           |
 | of syscons          | progress | Jake Burkholder | background colour   |
 |                     |          |                 | in syscons. Creator |
 |                     |          |                 | frame buffer device |
 |                     |          |                 | driver. In the      |
 |                     |          |                 | process, generally  |
 |                     |          |                 | improve the MI-ness |
 |                     |          |                 | of syscons.         |
 |---------------------+----------+-----------------+---------------------|
 |                     |          |                 | Many systems        |
 |                     |          |                 | supporting POSIX.1e |
 |                     |          |                 | ACLs permit a minor |
 |                     |          |                 | violation to that   |
 |                     |          |                 | specification, in   |
 |                     |          |                 | which the ACL_MASK  |
 |                     |          |                 | entry overrides the |
 | ACL_MASK override   | In       |                 | umask, rather than  |
 | of umask support in | progress | Robert Watson   | being intersected   |
 | UFS                 |          |                 | with it. The        |
 |                     |          |                 | resulting semantics |
 |                     |          |                 | can be useful in    |
 |                     |          |                 | group-oriented      |
 |                     |          |                 | environments, and   |
 |                     |          |                 | as such would be    |
 |                     |          |                 | very helpful on     |
 |                     |          |                 | FreeBSD.            |
 |---------------------+----------+-----------------+---------------------|
 |                     |          |                 | 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      |
 |                     |          |                 | Giant, due to       |
 | Fine-grained        |          |                 | dependencies on     |
 | network stack       | In       | Jeffrey Hsu,    | sockets, routing,   |
 | locking without     | progress | Seigo Tanimura  | etc. A 5.2-RELEASE  |
 | Giant               |          |                 | 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.              |
 |---------------------+----------+-----------------+---------------------|
 |                     |          |                 | Move ATA commands   |
 |                     |          |                 | into requests, so   |
 |                     |          |                 | that they can be    |
 |                     |          |                 | linked together,    |
 |                     |          |                 | centralize request  |
 |                     |          |                 | queue management    |
 |                     |          |                 | permitting direct   |
 | ATA driver          |          |                 | DMA of ATA          |
 | structural          | In       | So/ren Schmidt  | commands. These     |
 | improvements,       | progress |                 | architectural       |
 | MPsafety            |          |                 | changes will also   |
 |                     |          |                 | facilitate complete |
 |                     |          |                 | MP-safety of the    |
 |                     |          |                 | ATA driver suite,   |
 |                     |          |                 | and dramatically    |
 |                     |          |                 | improve support for |
 |                     |          |                 | Promise RAID        |
 |                     |          |                 | controllers.        |
 |---------------------+----------+-----------------+---------------------|
 |                     |          |                 | Productionable      |
 |                     |          |                 | support for the     |
 |                     |          |                 | AMD64 platform.     |
 |                     |          |                 | Currently, AMD64    |
 |                     |          |                 | runs fully in       |
 |                     |          |                 | 32-bit emulation    |
 | Tier-1 Support for  | In       | Peter Wemm,     | mode, and boots to  |
 | AMD64 Hammer        | progress | David O'Brien   | single-user in      |
 |                     |          |                 | 64-bit mode. We     |
 |                     |          |                 | expect full         |
 |                     |          |                 | production support  |
 |                     |          |                 | for the AMD64       |
 |                     |          |                 | architecture in     |
 |                     |          |                 | 5.2-RELEASE.        |
 |---------------------+----------+-----------------+---------------------|
 |                     |          |                 | To properly support |
 |                     |          |                 | AMD64, a compiler   |
 |                     |          |                 | upgrade is          |
 |                     |          |                 | required; however,  |
 |                     |          |                 | the new GCC 3.3 has |
 |                     |          | David O'Brien   | a substantial       |
 | GCC 3.3 upgrade     | In       | Alexander       | number of new       |
 |                     | progress | Kabaev          | warnings that will  |
 |                     |          |                 | disrupt application |
 |                     |          |                 | support, preventing |
 |                     |          |                 | inclusion in        |
 |                     |          |                 | 5.1-RELEASE. This   |
 |                     |          |                 | is a must-have 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    |
 | Revised kld build   | --       | --              | MAC, 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   |
 | Light-weight        |          |                 | when a full-weight  |
 | interrupt threads,  | --       | --              | context is required |
 | context switches    |          |                 | (such 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.   |
 |---------------------+----------+-----------------+---------------------|
 |                     |          |                 | With the            |
 |                     |          |                 | introduction of     |
 |                     |          |                 | extensive PAM and   |
 |                     |          |                 | NSS support in      |
 |                     |          |                 | 5.0-RELEASE and     |
 |                     |          |                 | 5.1-RELEASE,        |
 | Support for a fully | In       | Gordon Tetlow   | support for a fully |
 | dynamic system      | progress |                 | dynamically linked  |
 |                     |          |                 | system is desired.  |
 |                     |          |                 | Gordon Tetlow has   |
 |                     |          |                 | in-progress patches |
 |                     |          |                 | to post for review  |
 |                     |          |                 | following the 5.1   |
 |                     |          |                 | release cycle.      |
 |---------------------+----------+-----------------+---------------------|
 |                     |          |                 | Existing interrupt  |
 |                     |          |                 | routing code is not |
 |                     |          |                 | able to correctly   |
 |                     |          |                 | determine the       |
 |                     |          |                 | interrupt routing   |
 | Complete the APIC   |          |                 | of PCI devices that |
 | PCI interrupt       | --       | --              | are behind          |
 | routing support     |          |                 | PCI-to-PCI bridges  |
 |                     |          |                 | when using APIC     |
 |                     |          |                 | Full Table routing  |
 |                     |          |                 | (with non-legacy    |
 |                     |          |                 | interrupts above    |
 |                     |          |                 | 15).                |
 |---------------------+----------+-----------------+---------------------|
 |                     |          |                 | 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 easy |
 | of GBDE and related | --       | --              | automated           |
 | transforms          |          |                 | deployment.         |
 |                     |          |                 | Improved            |
 |                     |          |                 | integration with    |
 |                     |          |                 | the configuration,  |
 |                     |          |                 | mounting, and boot  |
 |                     |          |                 | process is required |
 |                     |          |                 | to make this        |
 |                     |          |                 | feature more easily |
 |                     |          |                 | accessible.         |
 |---------------------+----------+-----------------+---------------------|
 |                     |          |                 | Brian Feldman has   |
 |                     |          |                 | submitted patches   |
 |                     |          |                 | to improve the      |
 |                     |          |                 | consistency of the  |
 |                     |          |                 | pathnames passed    |
 | MAC Framework devfs | In       |                 | into the MAC        |
 | path fixes          | progress | Robert Watson   | Framework devfs     |
 |                     |          |                 | labeling entry      |
 |                     |          |                 | points. These       |
 |                     |          |                 | patches need to be  |
 |                     |          |                 | thoroughly reviewed |
 |                     |          |                 | and tested, then    |
 |                     |          |                 | merged.             |
 |---------------------+----------+-----------------+---------------------|
 |                     |          |                 | A process cannot be |
 |                     |          |                 | interrupted while   |
 |                     |          |                 | waiting on a lock.  |
 |                     |          |                 | Fixing this         |
 | rpc.lockd(8)        | In       | Robert Watson   | requires that the   |
 | stability           | progress |                 | rpc code be taught  |
 |                     |          |                 | how to deal with    |
 |                     |          |                 | lock cancellation   |
 |                     |          |                 | and interruption    |
 |                     |          |                 | events.             |
 +------------------------------------------------------------------------+

Desired Features for 5.2-RELEASE

 +------------------------------------------------------------------------+
 |   Issue    |  Status   |  Responsible   |  Description  |              |
 |------------+-----------+----------------+---------------|              |
 |            |           |                | 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      |              |
 | Race       |           |                | appears to    |              |
 | conditions | Errata    | Robert Drehmel | exist where   |              |
 | in truss   | candidate |                | in truss 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     |           |                | gdb -k        |              |
 | support    | --        | Mark Peek      | doesn't work  |              |
 | for alpha  |           |                | on alpha      |              |
 |------------+-----------+----------------+---------------|              |
 |            |           |                | Currently,    |              |
 |            |           |                | MAC           |              |
 |            |           |                | protections   |              |
 |            |           |                | are enforced  |              |
 |            |           |                | only on       |              |
 |            |           |                | locally       |              |
 |            |           |                | originated    |              |
 |            |           |                | file system   |              |
 |            |           |                | operations    |              |
 |            |           |                | (VOPs), and   |              |
 |            |           |                | not on RPCs   |              |
 |            |           |                | generated via |              |
 |            |           |                | the NFS       |              |
 | MAC        |           |                | server.       |              |
 | support    |           |                | Improvements  |              |
 | for NFS    | --        | Robert Watson  | in NFS server |              |
 | Server     |           |                | 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        |              |
 | busdma in  |           |                | vtophys()     |              |
 | all PCI    | --        | --             | 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       |              |
 | GDB thread |           |                | debugging of  |              |
 | support    | --        | --             | 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,       | The benefits |
 |            |           |                | binding and   | of           |
 |            |           |                | relocation.   | prebinding   |
 |            |           |                | This is       | are realized |
 |            |           |                | accomplished  | when running |
 |            |           |                | by a          | executables  |
 |            |           |                | prebinding    | that use a   |
 |            |           |                | data file or  | large (>10)  |
 | Per object |           |                | ELF segment   | number of    |
 | ELF        | In        | Matthew Dodd   | that contains | shared       |
 | Prebinding | progress  |                | intermediate  | libraries.   |
 | support    |           |                | lookup        | C++          |
 |            |           |                | results       | applications |
 |            |           |                | allowing fast | also benefit |
 |            |           |                | symbol        | as they      |
 |            |           |                | binding and   | contain a    |
 |            |           |                | relocation,   | large number |
 |            |           |                | provided that | of           |
 |            |           |                | dependent     | relocations. |
 |            |           |                | objects       |              |
 |            |           |                | remain        |              |
 |            |           |                | unchanged     |              |
 |            |           |                | since the     |              |
 |            |           |                | prebinding    |              |
 |            |           |                | information   |              |
 |            |           |                | was           |              |
 |            |           |                | generated.    |              |
 +------------------------------------------------------------------------+

Documentation items that must be resolved for 5.2

 +------------------------------------------------------------------------+
 |     Issue     | Status |  Responsible  |          Description          |
 |---------------+--------+---------------+-------------------------------|
 | Bluetooth     |        |               | It'd be nice to have some     |
 | documentation | --     | Pav Lucistnik | Bluetooth documentation for   |
 |               |        |               | the Handbook.                 |
 +------------------------------------------------------------------------+

Testing focuses for 5.2-RELEASE

 +------------------------------------------------------------------------+
 |    Issue     |    Status     |    Responsible     |    Description     |
 +------------------------------------------------------------------------+

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

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