linux-kernel - [PATCH 0/3] cpu freq: fix problems with work_on

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Message-Id: <20090116191108.135927000@polaris-admin.engr.sgi.com>
Date:	Fri, 16 Jan 2009 11:11:08 -0800
From:	Mike Travis <travis@....com>
To:	Ingo Molnar <mingo@...hat.com>, Dave Jones <davej@...hat.com>
Cc:	Rusty Russell <rusty@...tcorp.com.au>, cpufreq@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 0/3] cpu freq: fix problems with work_on_cpu usage in acpi-cpufreq

This set of patches improves the work_on_cpu() function to
eliminate circular lock dependencies from occurring by requiring
the caller to insure the cpu does not go offline.  This effectively
models the previous behaviour using set_cpus_allowed().

The other fix is to use a separate work queue for work_on_cpu so
it does not clash with kevent items that might already be on the
queue from the same caller.

This fixes the boot up and suspend/resume to disk problems previously
seen.

Signed-off-by: Mike Travis <travis@....com>
Cc: Dieter Ries <clip2@....de>
Cc: Maciej Rutecki <maciej.rutecki@...il.com>
Cc: Dave Jones <davej@...hat.com>
Cc: <cpufreq@...r.kernel.org>

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