linux-kernel - [REGRESSION] S3 suspend on SandyBridge freezes due to on_each

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Date:	Wed, 26 Jan 2011 17:02:31 +0100
From:	Matthias Hopf <mhopf@...e.de>
To:	Tejun Heo <tj@...nel.org>, Ingo Molnar <mingo@...e.hu>,
	Matthieu CASTET <castet.matthieu@...e.fr>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Milton Miller <miltonm@....com>, linux-kernel@...r.kernel.org,
	Oliver Neukum <oneukum@...e.de>
Subject: [REGRESSION] S3 suspend on SandyBridge freezes due to
 on_each_cpu() change (bd924e8)

While bisecting a dri S3 issue I stumbled in 2.6.38-rc1 over a
regression because of NX protection (5bd5a4, currently being discussed),
and with a patch fixing this issue I stumbled again in 2.6.38-rc2
because of commit bd924e8:

    smp: Allow on_each_cpu() to be called while early_boot_irqs_disabled status to init/main.c

Reverting this commit makes suspend work on SandyBridge again. I haven't
tested reverting this commit on v2.6.38-rc2 yet, though.

I'm compiling for i586, not x86_64.

lspci -vvv output is attached.


(for internal reference: machine NUE874)

Matthias

-- 
Matthias Hopf <mhopf@...e.de>      __        __   __
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