On Fri, 2012-07-20 at 14:19 +0800, Alex Shi wrote: > commit 8e7fbcbc22c(sched: Remove stale power aware scheduling remnants > and dysfunctional knobs) removed SD_PERFER_SIBLING on CPU domain > On numa machine, that causes load_balance didn't perfer LCPU in same > physical CPU package. > > It causes some regression on our numa machines from core2 to NHM and SNB. > Recover this domain flag can recover the performance drop. > > This recovery doesn't has any bad impact on my all benchmarks specjbb, > kbuild, fio, hackbench .. etc, on all my machines. > Since it is a recovery, I assume it also has no bad impact for other > platforms. > > Signed-off-by: Alex Shi <alex....@intel.com>
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