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DateSat, 14 Mar 2009 11:21:17 -0700
FromYinghai Lu <>
SubjectRe: [tip:x86/mm] x86: make e820_update_range() handle small range update
Ingo Molnar wrote:
> * Yinghai Lu <yinghai@kernel.org> wrote:
>
>> Commit-ID: 78a8b35bc7abf8b8333d6f625e08c0f7cc1c3742
>> Gitweb: http://git.kernel.org/tip/78a8b35bc7abf8b8333d6f625e08c0f7cc1c3742
>> Author: Yinghai Lu <yinghai@kernel.org>
>> AuthorDate: Thu, 12 Mar 2009 22:36:01 -0700
>> Commit: Ingo Molnar <mingo@elte.hu>
>> CommitDate: Sat, 14 Mar 2009 12:20:07 +0100
>>
>> x86: make e820_update_range() handle small range update
>>
>> Impact: enhance e820 code to handle more cases
>>
>> Try to handle new range which could be covered by one entry.
>>
>> Signed-off-by: Yinghai Lu <yinghai@kernel.org>
>> Cc: jbeulich@novell.com
>> LKML-Reference: <49B9F0C1.10402@kernel.org>
>> Signed-off-by: Ingo Molnar <mingo@elte.hu>
>
> -tip testing found a bootup crash + reboot due to this patch.
>
> config attached. The bootup crashes here:
>
> [ 0.000000] MTRR variable ranges enabled:
> [ 0.000000] 0 base 0000000000 mask FFC0000000 write-back
> [ 0.000000] 1 disabled
> [ 0.000000] 2 disabled
> [ 0.000000] 3 disabled
> [ 0.000000] 4 disabled
> [ 0.000000] 5 disabled
> [ 0.000000] 6 disabled
> [ 0.000000] 7 disabled
> [ 0.000000] x86 PAT enabled: cpu 0, old 0x7040600070406, new 0x7010600070106
> [ 0.000000] get_mtrr: cpu0 reg00 base=0000000000 size=0000040000 write-back
> [ reboot ]
>

what does the e820 map look like?

YH


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