[PATCH 2][Xen-devel] Cpufreq: prevent negative px resident time, add spinlock to avoid race

["Liu, Jinsong" <jinsong.liu@xxxxxxxxx>]

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>

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

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel