From: Nikhil Rao Date: Wed, 13 Oct 2010 19:09:36 +0000 (-0700) Subject: sched: Set group_imb only a task can be pulled from the busiest cpu X-Git-Tag: v2.6.37-rc1~213^2~11 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2582f0eba54066b5e98ff2b27ef0cfa833b59f54;p=pandora-kernel.git sched: Set group_imb only a task can be pulled from the busiest cpu 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 Signed-off-by: Peter Zijlstra LKML-Reference: <1286996978-7007-3-git-send-email-ncrao@google.com> [ small code readability edits ] Signed-off-by: Ingo Molnar --- Reading git-diff-tree failed