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(parent: 0b44f48) | patch
this_cpu: Use this_cpu ops for VM statistics
authorChristoph Lameter <cl@linux-foundation.org>
Sat, 3 Oct 2009 10:48:23 +0000 (19:48 +0900)
committerTejun Heo <tj@kernel.org>
Sat, 3 Oct 2009 10:48:23 +0000 (19:48 +0900)
commit4dac3e98840f11bb2d8d52fd375150c7c1912117
tree64a464cb4df4a5e9683da4eabba0e7b399728023tree | snapshot
parent0b44f4861f4cc1089424821f078d38441f8b4983commit | diff
this_cpu: Use this_cpu ops for VM statistics

Using per cpu atomics for the vm statistics reduces their overhead.
And in the case of x86 we are guaranteed that they will never race even
in the lax form used for vm statistics.

Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Christoph Lameter <cl@linux-foundation.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
include/linux/vmstat.h diff | blob | history
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