Commit-ID: 753c72119743e8a12f5e9d34312988c810458917 Gitweb: http://git.kernel.org/tip/753c72119743e8a12f5e9d34312988c810458917 Author: Mike Galbraith <efault@xxxxxx> AuthorDate: Mon, 2 Nov 2009 20:36:51 +0100 Committer: Ingo Molnar <mingo@xxxxxxx> CommitDate: Mon, 2 Nov 2009 20:43:07 +0100 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@xxxxxxxxxxxxxxx> Signed-off-by: Mike Galbraith <efault@xxxxxx> Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@xxxxxxx> --- arch/x86/include/asm/topology.h | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/arch/x86/include/asm/topology.h b/arch/x86/include/asm/topology.h index d823c24..40e37b1 100644 --- a/arch/x86/include/asm/topology.h +++ b/arch/x86/include/asm/topology.h @@ -143,7 +143,7 @@ extern unsigned long node_remap_size[]; | 1*SD_BALANCE_FORK \ | 0*SD_BALANCE_WAKE \ | 1*SD_WAKE_AFFINE \ - | 1*SD_PREFER_LOCAL \ + | 0*SD_PREFER_LOCAL \ | 0*SD_SHARE_CPUPOWER \ | 0*SD_POWERSAVINGS_BALANCE \ | 0*SD_SHARE_PKG_RESOURCES \ -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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