>> Commit-ID: 80e3d87b2c5582db0ab5e39610ce3707d97ba409 >> Gitweb: >> http://git.kernel.org/tip/80e3d87b2c5582db0ab5e39610ce3707d97ba409 >> Author: Tim Chen <[email protected]> >> AuthorDate: Fri, 12 Dec 2014 15:38:12 -0800 >> Committer: Ingo Molnar <[email protected]> >> 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 <[email protected]> >> Signed-off-by: Peter Zijlstra (Intel) <[email protected]> >> Cc: Shawn Bohrer <[email protected]> >> Cc: Suruchi Kadu <[email protected]> >> Cc: Doug Nelson<[email protected]> >> Cc: Steven Rostedt <[email protected]> >> Cc: Linus Torvalds <[email protected]> >> Link: >> http://lkml.kernel.org/r/[email protected] >> Signed-off-by: Ingo Molnar <[email protected]> > > 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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