From 2582f0eba54066b5e98ff2b27ef0cfa833b59f54 Mon Sep 17 00:00:00 2001 From: Nikhil Rao Date: Wed, 13 Oct 2010 12:09:36 -0700 Subject: [PATCH] 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-format-patch failed