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| author | Rik van Riel <riel@redhat.com> | 2014-06-08 22:55:57 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-06-08 23:35:05 +0200 |
| commit | 1662867a9b2574bfdb9d4e97186aa131218d7210 (patch) | |
| tree | 6c8408360b9dceecad772dee5b9152a1515cf401 /kernel/sched/fair.c | |
| parent | Don't trigger congestion wait on dirty-but-not-writeout pages (diff) | |
| download | linux-1662867a9b2574bfdb9d4e97186aa131218d7210.tar.xz linux-1662867a9b2574bfdb9d4e97186aa131218d7210.zip | |
numa,sched: fix load_to_imbalanced logic inversion
This function is supposed to return true if the new load imbalance is
worse than the old one. It didn't. I can only hope brown paper bags
are in style.
Now things converge much better on both the 4 node and 8 node systems.
I am not sure why this did not seem to impact specjbb performance on the
4 node system, which is the system I have full-time access to.
This bug was introduced recently, with commit e63da03639cc ("sched/numa:
Allow task switch if load imbalance improves")
Signed-off-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to '')
| -rw-r--r-- | kernel/sched/fair.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 17de1956ddad..9855e87d671a 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -1120,7 +1120,7 @@ static bool load_too_imbalanced(long orig_src_load, long orig_dst_load, old_imb = orig_dst_load * 100 - orig_src_load * env->imbalance_pct; /* Would this change make things worse? */ - return (old_imb > imb); + return (imb > old_imb); } /* |