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由 Peter Zijlstra 提交于
Smart wake-affine is using node-size as the factor currently, but the overhead of the mask operation is high. Thus, this patch introduce the 'sd_llc_size' percpu variable, which will record the highest cache-share domain size, and make it to be the new factor, in order to reduce the overhead and make it more reasonable. Tested-by: NDavidlohr Bueso <davidlohr.bueso@hp.com> Tested-by: NMichael Wang <wangyun@linux.vnet.ibm.com> Signed-off-by: NPeter Zijlstra <peterz@infradead.org> Acked-by: NMichael Wang <wangyun@linux.vnet.ibm.com> Cc: Mike Galbraith <efault@gmx.de> Link: http://lkml.kernel.org/r/51D5008E.6030102@linux.vnet.ibm.com [ Tidied up the changelog. ] Signed-off-by: NIngo Molnar <mingo@kernel.org>
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