[PATCH 2][Xen-devel] Cpufreq: prevent negative px resident time,

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Subject:	[PATCH 2][Xen-devel] Cpufreq: prevent negative px resident time, add spinlock to avoid race
From:	"Liu, Jinsong" <jinsong.liu@xxxxxxxxx>
Date:	Wed, 31 Dec 2008 19:19:06 +0800
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Cc:	Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Delivery-date:	Wed, 31 Dec 2008 03:19:36 -0800
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Thread-topic:	[PATCH 2][Xen-devel] Cpufreq: prevent negative px resident time, add spinlock to avoid race

Cpufreq: prevent negative px resident time, add spinlock to avoid race

Due to NOW() value may drift between different cpus, we add protection to 
prevent negative px resident time.
Due to both cpufreq logic and xenpm may race accessing cpufreq_statistic_data, 
we add spinlock to avoid race.

Signed-off-by: Liu, Jinsong <jinsong.liu@xxxxxxxxx>

px-xen-2-statisitic-update.patch
Description: px-xen-2-statisitic-update.patch

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[PATCH 2][Xen-devel] Cpufreq: prevent negative px resident time, add spi