From: Ingo Molnar <mingo@elte.hu>
Date: Wed, 8 Mar 2006 05:55:27 +0000 (-0800)
Subject: [PATCH] idle threads should have a sane ->timestamp value
X-Git-Tag: v2.6.16-rc6~73
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=81c29a857d3c8d6ea9c4f20d196c36bf0a07c615;p=linux-2.6

[PATCH] idle threads should have a sane ->timestamp value

Idle threads should have a sane ->timestamp value, to avoid init kernel
thread(s) from inheriting it and causing miscalculations in
try_to_wake_up().

Reported-by: Mike Galbraith <efault@gmx.de>.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/kernel/sched.c b/kernel/sched.c
index 3454bb869f..e82c99f1db 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -4335,6 +4335,7 @@ void __devinit init_idle(task_t *idle, int cpu)
 	runqueue_t *rq = cpu_rq(cpu);
 	unsigned long flags;
 
+	idle->timestamp = sched_clock();
 	idle->sleep_avg = 0;
 	idle->array = NULL;
 	idle->prio = MAX_PRIO;