linux-kernel - Re: [Bug 14658] Regression in efi.c

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Date:	Mon, 23 Nov 2009 13:12:13 +1030
From:	indexer <indexer@...ernode.on.net>
To:	Thomas Gleixner <tglx@...utronix.de>
CC:	"Rafael J. Wysocki" <rjw@...k.pl>,
	LKML <linux-kernel@...r.kernel.org>,
	Feng Tang <feng.tang@...el.com>,
	bugzilla-daemon@...zilla.kernel.org
Subject: Re: [Bug 14658] Regression in efi.c

Thomas Gleixner wrote:
> On Sat, 21 Nov 2009, bugzilla-daemon@...zilla.kernel.org wrote:
>
> Switched to email. Please reply by mail (reply-to-all) and not in the
> bugzilla.
>
>   
>> --- Comment #1 from Rafael J. Wysocki <rjw@...k.pl>  2009-11-21 20:17:21 ---
>> Caused by:
>>
>> commit 7bd867dfb4e0357e06a3211ab2bd0e714110def3
>>     
>
> That's completely bogus. That commit is not in 2.6.31. It was merged in the
> 2.6.32 merge window.
>
> From the original bug report:
>
> http://marc.info/?l=linux-kernel&m=125846988820120&w=4
>
>   
>> I would like to report a possible regression in efi.c with kernels
>> 2.6.31 , 2.6.32-rc5 and 2.6.32.rc7.
>>
>> Attempting to boot x86_64 with elilo succeeds using 2.6.30 . Using the
>> same config cannot boot with any of the 3 afore mentioned kernels.
>>     
>
> So the problem exists with 2.6.31 already which excludes the above
> commit.
>
> The above commit indeed caused problems on 64bit efi systems in
> 2.6.32-rc. The fix was merged between 32-rc5 and 32-rc6.
>
> The bisect was done with:
>
> git bisect start
> # good: [59a3759d0fe8d969888c741bb33f4946e4d3750d] Linux 2.6.30-rc7
> git bisect good 59a3759d0fe8d969888c741bb33f4946e4d3750d
> # bad: [156171c71a0dc4bce12b4408bb1591f8fe32dc1a] Linux 2.6.32-rc7
>
> while the bisect should have be done with
>
> good 2.6.30
> bad  2.6.31
>
> William, could you please go through the bisect pain again?
>
> Thanks,
>
> 	tglx
> --
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> Please read the FAQ at  http://www.tux.org/lkml/
>   
Thomas

I had already done a similar bisect to this in private conversation to 
Huang Ying, and is what prompted me to expand my bisect out. I redid it 
regardless and will send you the information.

commit 74fca6a42863ffacaf7ba6f1936a9f228950f657
Author: Linus Torvalds <torvalds@...ux-foundation.org>
Date:   Wed Sep 9 15:13:59 2009 -0700

    Linux 2.6.31

 Makefile |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)


git bisect start
# good: [07a2039b8eb0af4ff464efd3dfd95de5c02648c6] Linux 2.6.30
git bisect good 07a2039b8eb0af4ff464efd3dfd95de5c02648c6
# bad: [74fca6a42863ffacaf7ba6f1936a9f228950f657] Linux 2.6.31
git bisect bad 74fca6a42863ffacaf7ba6f1936a9f228950f657
# good: [925d74ae717c9a12d3618eb4b36b9fb632e2cef3] V4L/DVB (11736): 
videobuf: modify return value of VIDIOC_REQBUFS ioctl
git bisect good 925d74ae717c9a12d3618eb4b36b9fb632e2cef3
# good: [a380137900fca5c79e6daa9500bdb6ea5649188e] ixgbe: Fix device 
capabilities of 82599 single speed fiber NICs.
git bisect good a380137900fca5c79e6daa9500bdb6ea5649188e
# good: [b54c3835469c9548d470e7788cb22a2fd7e21133] Merge branch 
'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6
git bisect good b54c3835469c9548d470e7788cb22a2fd7e21133
# good: [7b2aa037e878c939676675969983284a02958ae3] Merge 
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6
git bisect good 7b2aa037e878c939676675969983284a02958ae3
# good: [8486a0f95c844b27ecc855cfec89b7e34f831cad] Merge 
git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
git bisect good 8486a0f95c844b27ecc855cfec89b7e34f831cad
# good: [f415c413f458837bd0c27086b79aca889f9435e4] Merge 
git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
git bisect good f415c413f458837bd0c27086b79aca889f9435e4
# good: [37d0892c5a94e208cf863e3b7bac014edee4346d] autofs4 - fix missed 
case when changing to use struct path
git bisect good 37d0892c5a94e208cf863e3b7bac014edee4346d
# good: [0edfa2b1b5a5e1475e76dd3c792447687d966de4] Merge branch 
'for-linus' of git://oss.sgi.com/xfs/xfs
git bisect good 0edfa2b1b5a5e1475e76dd3c792447687d966de4
# good: [5136a6c0fd5b26bbf39ad761cf7a4fc563ad83a3] Merge 
git://git.infradead.org/~dwmw2/mtd-2.6.31
git bisect good 5136a6c0fd5b26bbf39ad761cf7a4fc563ad83a3
# good: [f69fb9c39868463f6b0b8306824341bd5610250b] Merge branch 
'for-linus' of 
git://git.kernel.org/pub/scm/linux/kernel/git/anholt/drm-intel
git bisect good f69fb9c39868463f6b0b8306824341bd5610250b
# good: [755ae761c5519929a97567d61a379b87352c337c] Merge branch 
'for-linus' of 
git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6
git bisect good 755ae761c5519929a97567d61a379b87352c337c
# good: [7c8460db30dfd085ef3837c8fb02ecf2e718b983] drm/i915: fix mask 
bits setting
git bisect good 7c8460db30dfd085ef3837c8fb02ecf2e718b983
# good: [7135a71b19be1faf48b7148d77844d03bc0717d6] aoe: allocate unused 
request_queue for sysfs
git bisect good 7135a71b19be1faf48b7148d77844d03bc0717d6
 Sincerely

William

PS - The fact remains i still cant efi boot in 2.6.32-rc7, so this bug 
still exists, and I will keep doing what i can to help track this down.
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