From: Borislav Petkov <bp@alien8.de>
To: Jody Bruchon <jody@nctritech.com>
Cc: linux-kernel@vger.kernel.org,
"H. Peter Anvin" <hpa@linux.intel.com>,
Suresh Siddha <suresh.b.siddha@intel.com>
Subject: Re: [REGRESSION] [BISECT] ACPI+Inspiron 1545 = crash at xrstor_state()
Date: Tue, 16 Nov 2010 15:42:13 +0100 [thread overview]
Message-ID: <20101116144213.GA3715@a1.tnic> (raw)
On Tue, Nov 16, 2010 at 04:56:06AM -0500, Jody Bruchon wrote:
> I previously reported an early boot crash on an Inspiron 1545 laptop;
> see previous posts for more details. I used the parameters "debug
> vga=6 earlyprintk=vga" to catch these errors since they happen so
> early in boot that the normal console has not yet initialized.
>
> A picture of the crash dump from 2.6.37-rc2 is available here (2.6.36
> crash is identical except for the reported kernel version):
> http://c02ware.com/bugs/dump_c7ff0d9c92435e836e13aaa8d0e56d4000424bcc.jpg
>
> I have experienced similar problems on a small number of other systems
> also. After confirming that the problem was introduced going from
> 2.6.35 to 2.6.36, I have successfully bisected the kernel, and
> narrowed down and tested to verify the commit which introduced the
> problem. Reverting this commit fixes 2.6.36 but 2.6.37-rc2 has the
> exact same crash even if I revert it. I don't know what to do from
> here, but someone with more knowledge can surely guide me. I will
> only have the unit to test with for another day or two. I have
> attached a suitable .config for reference as well. The commit info is
> below.
I don't think this patch is at fault. Your oops photo above shows that
the machine oopses at the first xrstor call in xstate_enable_boot_cpu():
1c3: 0f 06 clts
1c5: 83 c8 ff or $0xffffffff,%eax
1c8: 89 c2 mov %eax,%edx
1ca: 0f ae 2f xrstor (%edi) <---------
1cd: 8b 3d 54 00 00 00 mov 0x54,%edi
1d3: 0f ae 27 xsave (%edi)
Adding more people to Cc.
--
Regards/Gruss,
Boris.
next reply other threads:[~2010-11-16 14:42 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-16 14:42 Borislav Petkov [this message]
2010-11-16 19:24 ` [REGRESSION] [BISECT] ACPI+Inspiron 1545 = crash at xrstor_state() Suresh Siddha
-- strict thread matches above, loose matches on Subject: below --
2010-11-16 9:56 Jody Bruchon
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