[RFC] change non-atomic bitops method
From: Laura Abbott <hidden>
Date: 2015-02-02 18:53:21
Also in:
linux-arch, lkml
On 2/1/2015 7:55 PM, Wang, Yalin wrote:
This patch change non-atomic bitops, add a if() condition to test it, before set/clear the bit. so that we don't need dirty the cache line, if this bit have been set or clear. On SMP system, dirty cache line will need invalidate other processors cache line, this will have some impact on SMP systems.
Any actual numbers to give an idea of the impact? Thanks, Laura -- Qualcomm Innovation Center, Inc. Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project