>> Commit-ID: 80e3d87b2c5582db0ab5e39610ce3707d97ba409 >> Gitweb: http://git.kernel.org/tip/80e3d87b2c5582db0ab5e39610ce3707d97ba409 >> Author: Tim Chen <tim.c.chen@xxxxxxxxxxxxxxx> >> AuthorDate: Fri, 12 Dec 2014 15:38:12 -0800 >> Committer: Ingo Molnar <mingo@xxxxxxxxxx> >> 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.chen@xxxxxxxxxxxxxxx> >> Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx> >> Cc: Shawn Bohrer <sbohrer@xxxxxxxxxxxxxxx> >> Cc: Suruchi Kadu <suruchi.a.kadu@xxxxxxxxx> >> Cc: Doug Nelson<doug.nelson@xxxxxxxxx> >> Cc: Steven Rostedt <rostedt@xxxxxxxxxxx> >> Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> >> Link: http://lkml.kernel.org/r/1421430374.2399.27.camel@xxxxxxxxxxxxxxxxxxxxxxxxx >> Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx> > > 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. > Queued up for 3.4. Thanks! -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html