linux-kernel - Re: [REGRESSION] S3 resume on SandyBridge doesn't work with NX protection (5bd5a45)

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Message-ID: <4D3735A2.2090806@zytor.com>
Date:	Wed, 19 Jan 2011 11:04:02 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Matthieu CASTET <castet.matthieu@...e.fr>,
	Lin Ming <ming.m.lin@...el.com>,
	Oliver Neukum <oneukum@...e.de>, rjw@...k.pl,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, x86@...nel.org,
	Steven Rostedt <rostedt@...dmis.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Andrew Morton <akpm@...ux-foundation.org>,
	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Stefano Stabellini <stefano.stabellini@...citrix.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Denys Vlasenko <vda.linux@...glemail.com>,
	Michal Marek <mmarek@...e.cz>, Yinghai Lu <yinghai@...nel.org>,
	Johannes Weiner <hannes@...xchg.org>,
	Pekka Enberg <penberg@...helsinki.fi>,
	Borislav Petkov <bp@...en8.de>,
	Suresh Siddha <suresh.b.siddha@...el.com>,
	Siarhei Liakh <sliakh.lkml@...il.com>,
	Xuxian Jiang <jiang@...ncsu.edu>,
	Dave Airlie <airlied@...hat.com>, Tejun Heo <tj@...nel.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [REGRESSION] S3 resume on SandyBridge doesn't work with NX protection
 (5bd5a45)

On 01/19/2011 09:37 AM, Matthias Hopf wrote:
> Git commit 5bd5a45 in Linus' tree "x86: Add NX protection for kernel data"
> apparently breaks resume on SandyBridge machines. This is supposed to be
> fixed with commit 691513f "x86: Resume trampoline must be executable",
> but even git master (v2.6.38-rc1) shows the same symptoms.
> 
> After suspend to S3, the machine doesn't resume upon wakeup, but boots
> normally instead. Reverting git commits 691513f, 84e1c6b, and especially
> 5bd5a45 (trivial except for a single hunk) makes resume work again.
> 
> lspci -vvv output is attached.
> 
> (for internal reference: machine NUE874)
> 

"Sandy Bridge machines" is not likely to be descriptive.  This is much
more likely to be related to a specific motherboard.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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