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| author | Nikhil Rao <ncrao@google.com> | 2011-02-10 10:23:25 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-02-17 15:37:22 -0800 |
| commit | 6e1d0fe98a1067b91a2d50040db69b18e5ef3446 (patch) | |
| tree | db0e6140ea4446ed44e6dddd3240aee30dd593b0 /kernel/lockdep_internals.h | |
| parent | 215856a4160cb959194e0605a9fcd6d1e71d2748 (diff) | |
sched: Set group_imb only a task can be pulled from the busiest cpu
Commit: 2582f0eba54066b5e98ff2b27ef0cfa833b59f54 upstream
When cycling through sched groups to determine the busiest group, set
group_imb only if the busiest cpu has more than 1 runnable task. This patch
fixes the case where two cpus in a group have one runnable task each, but there
is a large weight differential between these two tasks. The load balancer is
unable to migrate any task from this group, and hence do not consider this
group to be imbalanced.
Signed-off-by: Nikhil Rao <ncrao@google.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1286996978-7007-3-git-send-email-ncrao@google.com>
[ small code readability edits ]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Mike Galbraith <efault@gmx.de>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'kernel/lockdep_internals.h')
0 files changed, 0 insertions, 0 deletions