From: "H. Peter Anvin" <hpa@linux.intel.com>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: "Michal Hocko" <mhocko@suse.cz>, "H. Peter Anvin" <hpa@zytor.com>,
"Fernando Luis Vázquez Cao" <fernando@oss.ntt.co.jp>,
"Rafael J. Wysocki" <rjw@sisk.pl>,
"the arch/x86 maintainers" <x86@kernel.org>,
"linux-pm@vger.kernel.org" <linux-pm@vger.kernel.org>,
"Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] Revert "x86-64, init: Do not set NX bits on non-NX capable hardware"
Date: Mon, 20 May 2013 11:19:11 -0700 [thread overview]
Message-ID: <519A691F.9060007@linux.intel.com> (raw)
In-Reply-To: <CA+55aFx1teO9rnO8z6wVpo28JaUsqS2eDQJupUzBiGbEiHgLVg@mail.gmail.com>
On 05/20/2013 11:18 AM, Linus Torvalds wrote:
> On Mon, May 20, 2013 at 11:13 AM, H. Peter Anvin <hpa@linux.intel.com> wrote:
>>
>> Indeed. Looks like we corrupt a random bit in memory on resume.
>
> Well, in this case, it's probably the DEBUG_PAGEALLOC that Michal has
> enabled, which causes a page fault - and then a triple fault - at
> secondary CPU startup. And the triple fault then results in a reboot.
> Which explains the symptoms he gets.
>
> Without DEBUG_PAGEALLOC it ends up being "just" a single-bit corruption, yes.
>
Good, that explains what made it predictable. Score one for
DEBUG_PAGEALLOC.
-hpa
next prev parent reply other threads:[~2013-05-20 18:19 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-14 16:01 3.10-rc1 system starts regular boot when waking from s2ram Michal Hocko
2013-05-14 20:09 ` Rafael J. Wysocki
2013-05-15 8:01 ` Michal Hocko
2013-05-15 8:29 ` Pavel Machek
2013-05-15 9:05 ` Pavel Machek
2013-05-15 9:56 ` Michal Hocko
2013-05-17 7:54 ` Michal Hocko
2013-05-17 12:11 ` Rafael J. Wysocki
2013-05-17 12:09 ` Michal Hocko
2013-05-17 12:23 ` Rafael J. Wysocki
2013-05-17 12:30 ` Michal Hocko
2013-05-15 13:17 ` CONFIG_HYPERVISOR_GUEST=y {-- replace -- CONFIG_PARAVIRT_GUEST=y {= { # CONFIG_HYPERVISOR_GUEST is not set } Re: 3.10-rc1 system starts regular boot when waking from s2ram Fw: [PATCH 2/2] x86: Make Linux guest support optional Victor Miasnikov
2013-05-15 13:17 ` Victor Miasnikov
2013-05-15 13:34 ` Michal Hocko
2013-05-15 13:44 ` Victor Miasnikov
2013-05-15 13:44 ` Victor Miasnikov
2013-05-15 13:46 ` Michal Hocko
2013-05-15 14:05 ` CONFIG_HYPERVISOR_GUEST=y {-- replace -- CONFIG_PARAVIRT_GUEST=y {= { # CONFIG_HYPERVISOR_GUEST is not set } Re: 3.10-rc1 " Victor Miasnikov
2013-05-15 14:05 ` Victor Miasnikov
2013-05-15 14:21 ` Borislav Petkov
2013-05-15 14:52 ` Victor Miasnikov
2013-05-15 14:52 ` Victor Miasnikov
2013-05-15 17:34 ` Luck, Tony
2013-05-15 17:34 ` Luck, Tony
2013-05-20 15:03 ` [PATCH] Revert "x86-64, init: Do not set NX bits on non-NX capable hardware" Michal Hocko
2013-05-20 15:58 ` H. Peter Anvin
2013-05-20 16:43 ` Michal Hocko
2013-05-20 17:21 ` Linus Torvalds
2013-05-20 18:13 ` H. Peter Anvin
2013-05-20 18:18 ` Linus Torvalds
2013-05-20 18:19 ` H. Peter Anvin [this message]
2013-05-20 18:23 ` Michal Hocko
2013-05-20 18:30 ` H. Peter Anvin
2013-05-20 18:31 ` Michal Hocko
2013-05-20 18:31 ` Linus Torvalds
2013-05-20 18:36 ` H. Peter Anvin
2013-05-20 18:42 ` [tip:x86/urgent] x86-64: Make early_pmd_flags __cpuinitdata tip-bot for H. Peter Anvin
2013-05-20 18:50 ` tip-bot for H. Peter Anvin
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