Peter Zijlstra 75f93fed50 sched: Revert need_resched() to look at TIF_NEED_RESCHED ... Yuanhan reported a serious throughput regression in his pigz benchmark. Using the ftrace patch I found that several idle paths need more TLC before we can switch the generic need_resched() over to preempt_need_resched. The preemption paths benefit most from preempt_need_resched and do indeed use it; all other need_resched() users don't really care that much so reverting need_resched() back to tif_need_resched() is the simple and safe solution. Reported-by: Yuanhan Liu <yuanhan.liu@linux.intel.com> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: Fengguang Wu <fengguang.wu@intel.com> Cc: Huang Ying <ying.huang@intel.com> Cc: lkp@linux.intel.com Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: http://lkml.kernel.org/r/20130927153003.GF15690@laptop.programming.kicks-ass.net Signed-off-by: Ingo Molnar <mingo@kernel.org>		2013-09-28 10:04:47 +02:00
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asm	sched: Revert need_resched() to look at TIF_NEED_RESCHED	2013-09-28 10:04:47 +02:00
uapi/asm	kvm uapi: Add KICK_CPU and PV_UNHALT definition to uapi	2013-08-26 12:46:01 +03:00