[Bug 217882] panic on UEFI boot after recent changes

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=217882

            Bug ID: 217882
           Summary: panic on UEFI boot after recent changes
           Product: Base System
           Version: CURRENT
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: subbsd at gmail.com

After recent changes and fixes (
https://lists.freebsd.org/pipermail/freebsd-current/2017-March/065093.html
) I still had problems on host with increased EFI_STAGING_SIZE value.
I have custom FreeBSD distribution which has a sufficiently large
mfsroot which is loaded through UEFI mode.

To solve the problem, it was suggested to increase this variable and
rebuild /sys/boot:

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=209944

Also, it has to be increased periodically for some reason:

https://svnweb.freebsd.org/base/stable/11/sys/boot/efi/loader/copy.c?r1=305779&r2=305778&pathrev=305779

I've try to ask why than threatens to increase this parameter at once
large (or make it dependent on RAM):
https://lists.freebsd.org/pipermail/freebsd-hackers/2016-November/050142.html
but there are no answer options.

At the moment, on r315141 boot via UEFI is fine with default
EFI_STAGING_SIZE (64)

With EFI_STAGING_SIZE=768 i got panic after recent changes with follow message:

failed to allocate staging area:9
failed to allocate stating area
Failed to start image provided by ZFS (5)

I believe that there mfsroot may be greater than 64MB soon or later.

Also there are no problems with loading big mfsroot images when MBR
method is used.

PS:  I have ZFS-on-root system. With EFI_STAGING_SIZE=768 I lived with
constant CURRENT svnup/rebuilds for about a year. So I will be glad if
you pay attention to this.

How to reproduce:

1) EFI_STAGING_SIZE=768 in /etc/make.conf
2) make -C /sys/boot clean
3) make -C /sys/boot
4) make -C /sys/boot install
5) reboot

Host: FreeBSD 12.0-CURRENT r315413 amd64

-- 
You are receiving this mail because:
You are the assignee for the bug.