From: Kirill Tkhai <ktkhai@parallels.com>
Date: Mon, 15 Dec 2014 11:56:58 +0000 (+0300)
Subject: sched/fair: Fix sched_entity::avg::decay_count initialization
X-Git-Tag: omap-for-v4.1/prcm-dts-mfd-syscon-fix~163^2~18
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bb04159df99fa353d0fb524574aca03ce2c6515b;p=pandora-kernel.git

sched/fair: Fix sched_entity::avg::decay_count initialization

Child has the same decay_count as parent. If it's not zero,
we add it to parent's cfs_rq->removed_load:

wake_up_new_task()->set_task_cpu()->migrate_task_rq_fair().

Child's load is a just garbade after copying of parent,
it hasn't been on cfs_rq yet, and it must not be added to
cfs_rq::removed_load in migrate_task_rq_fair().

The patch moves sched_entity::avg::decay_count intialization
in sched_fork(). So, migrate_task_rq_fair() does not change
removed_load.

Signed-off-by: Kirill Tkhai <ktkhai@parallels.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Ben Segall <bsegall@google.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/1418644618.6074.13.camel@tkhai
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---

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