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[PATCH] sched: less newidle locking
authorNick Piggin <nickpiggin@yahoo.com.au>
Sat, 10 Sep 2005 07:26:16 +0000 (00:26 -0700)
committerLinus Torvalds <torvalds@g5.osdl.org>
Sat, 10 Sep 2005 17:06:23 +0000 (10:06 -0700)
commitd6d5cfaf4551aa7713ca6ab73bb77e832602204b
tree2741ff061bca597f26df340feec0a6ee58820e64tree | snapshot
parent67f9a619e7460b7d07284a9d0745727a77d3ade6commit | diff
[PATCH] sched: less newidle locking

Similarly to the earlier change in load_balance, only lock the runqueue in
load_balance_newidle if the busiest queue found has a nr_running > 1.  This
will reduce frequency of expensive remote runqueue lock aquisitions in the
schedule() path on some workloads.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
kernel/sched.c diff | blob | blame | history
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