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Re: -tip tree resume fail, bisect to 5bd5a45(x86: Add NX protection for kernel data)
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From: Lin Ming
Subject:
Re: -tip tree resume fail, bisect to 5bd5a45(x86: Add NX protection for kernel data)
Date: Monday, November 29, 2010 - 10:00 pm
On Sat, 2010-11-27 at 01:31 +0800, mat wrote:
quoted text
> Le Tue, 23 Nov 2010 23:55:27 +0100, > mat <castet.matthieu@free.fr> a écrit : > > > Le Mon, 22 Nov 2010 17:42:47 +0100, > > Andi Kleen <andi@firstfloor.org> a écrit : > > > > > > That seems to be a S3 specific code path, that won't fix anything. > > > > Simply do: > > > > > > > > echo 0 > /sys/devices/system/cpu/cpu1/online; > > > > echo 1 > /sys/devices/system/cpu/cpu1/online; > > > > > > > > and your machine will explode.. > > > > > > The SMP startup trampoline is copied I believe > > > and only executed in real mode without page tables. > > > > > > So it's perhaps not the trampoline, but the early startup > > > code that ends up being broken. > > yes : > > acpi wakeup code and smp trampoline are copied in low memory (first > > 1MB). > > > > So they can't end up int the kernel data mapping ? > > > > So it should something else. > > > > I will try to investigate on this. > > > Unfortunately on my laptop supporting NX, suspend to ram seems broken > (even without this patch) and I got only one core, so I am unable to > test it. > > Does cpu suspend/resume is broken ? Or it is only S3 ? > > If yes, are there any interesting trace if we suspend only one core with > sysfs.
echo 0 > /sys/devices/system/cpu/cpu1/online; echo 1 > /sys/devices/system/cpu/cpu1/online; then machine just reboots...
quoted text
> > Thanks, > > Matthieu
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Messages in current thread:
-tip tree resume fail, bisect to 5bd5a45(x86: Add NX prote ...
, Lin Ming
, (Mon Nov 22, 12:23 am)
Re: -tip tree resume fail, bisect to 5bd5a45(x86: Add NX p ...
, Ingo Molnar
, (Mon Nov 22, 1:07 am)
Re: -tip tree resume fail, bisect to 5bd5a45(x86: Add NX p ...
, Andi Kleen
, (Mon Nov 22, 2:20 am)
Re: -tip tree resume fail, bisect to 5bd5a45(x86: Add NX p ...
, castet.matthieu
, (Mon Nov 22, 3:29 am)
Re: -tip tree resume fail, bisect to 5bd5a45(x86: Add NX p ...
, Andi Kleen
, (Mon Nov 22, 3:47 am)
Re: -tip tree resume fail, bisect to 5bd5a45(x86: Add NX p ...
, Peter Zijlstra
, (Mon Nov 22, 6:03 am)
[tip:x86/security] x86: Resume trampoline must be executable
, tip-bot for Lin Ming
, (Mon Nov 22, 6:42 am)
Re: -tip tree resume fail, bisect to 5bd5a45(x86: Add NX p ...
, castet.matthieu
, (Mon Nov 22, 9:29 am)
Re: -tip tree resume fail, bisect to 5bd5a45(x86: Add NX p ...
, Peter Zijlstra
, (Mon Nov 22, 9:35 am)
Re: -tip tree resume fail, bisect to 5bd5a45(x86: Add NX p ...
, Andi Kleen
, (Mon Nov 22, 9:42 am)
Re: -tip tree resume fail, bisect to 5bd5a45(x86: Add NX p ...
, mat
, (Tue Nov 23, 3:55 pm)
Re: -tip tree resume fail, bisect to 5bd5a45(x86: Add NX p ...
, mat
, (Fri Nov 26, 10:31 am)
Re: -tip tree resume fail, bisect to 5bd5a45(x86: Add NX p ...
, Lin Ming
, (Fri Nov 26, 4:39 pm)
Re: -tip tree resume fail, bisect to 5bd5a45(x86: Add NX p ...
, Lin Ming
, (Mon Nov 29, 10:00 pm)
Re: -tip tree resume fail, bisect to 5bd5a45(x86: Add NX p ...
, Peter Zijlstra
, (Tue Nov 30, 4:27 am)
Re: -tip tree resume fail, bisect to 5bd5a45(x86: Add NX p ...
, Lin Ming
, (Tue Nov 30, 5:15 pm)
Re: -tip tree resume fail, bisect to 5bd5a45(x86: Add NX p ...
, matthieu castet
, (Fri Dec 24, 10:26 am)
Re: -tip tree resume fail, bisect to 5bd5a45(x86: Add NX p ...
, Lin Ming
, (Sun Dec 26, 7:10 pm)
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