>> Commit-ID: 80e3d87b2c5582db0ab5e39610ce3707d97ba409 >> Gitweb: >> http://git.kernel.org/tip/80e3d87b2c5582db0ab5e39610ce3707d97ba409 >> Author: Tim Chen <tim.c.c...@linux.intel.com> >> AuthorDate: Fri, 12 Dec 2014 15:38:12 -0800 >> Committer: Ingo Molnar <mi...@kernel.org> >> CommitDate: Fri, 30 Jan 2015 19:38:49 +0100 >> >> sched/rt: Reduce rq lock contention by eliminating locking of non-feasible >> target >> >> This patch adds checks that prevens futile attempts to move rt tasks >> to a CPU with active tasks of equal or higher priority. >> >> This reduces run queue lock contention and improves the performance of >> a well known OLTP benchmark by 0.7%. >> >> Signed-off-by: Tim Chen <tim.c.c...@linux.intel.com> >> Signed-off-by: Peter Zijlstra (Intel) <pet...@infradead.org> >> Cc: Shawn Bohrer <sboh...@rgmadvisors.com> >> Cc: Suruchi Kadu <suruchi.a.k...@intel.com> >> Cc: Doug Nelson<doug.nel...@intel.com> >> Cc: Steven Rostedt <rost...@goodmis.org> >> Cc: Linus Torvalds <torva...@linux-foundation.org> >> Link: >> http://lkml.kernel.org/r/1421430374.2399.27.ca...@schen9-desk2.jf.intel.com >> Signed-off-by: Ingo Molnar <mi...@kernel.org> > > I see this has been added to mainline already. I think this should go > to stable as well. As far back as it applies. I'll even add this to the > stable-rt if need be. But I rather pull it into stable-rt via the > stable branches. >
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