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authorMike Galbraith <efault@gmx.de>2009-11-02 20:36:51 +0100
committerIngo Molnar <mingo@elte.hu>2009-11-03 07:24:07 +0100
commit6b9de613ae9c79b637e070136585dde029578065 (patch)
treeab567c71852bf5dec21ab97e7dc3db1594a0ac7f /kernel/kthread.c
parent49557e620339cb134127b5bfbcfecc06b77d0232 (diff)
sched: Disable SD_PREFER_LOCAL at node level
Yanmin Zhang reported that SD_PREFER_LOCAL induces an order of magnitude increase in select_task_rq_fair() overhead while running heavy wakeup benchmarks (tbench and vmark). Since SD_BALANCE_WAKE is off at node level, turn SD_PREFER_LOCAL off as well pending further investigation. Reported-by: Zhang, Yanmin <yanmin_zhang@linux.intel.com> Signed-off-by: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/kthread.c')
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