This is a note to let you know that I have just added a patch titled

tick-sched: Check tick_nohz_enabled in tick_nohz_switch_to_nohz()

to the linux-3.13.y-queue branch of the 3.13.y.z extended stable tree which can be found at:

http://kernel.ubuntu.com/git?p=ubuntu/linux.git%3Ba=shortlog%3Bh=refs/heads/...

This patch is scheduled to be released in version 3.13.11.3.

If you, or anyone else, feels it should not be added to this tree, please reply to this email.

For more information about the 3.13.y.z tree, see https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks. -Kamal

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From 05760233a5718be8d39485f78d44e50d6a721290 Mon Sep 17 00:00:00 2001

From: Viresh Kumar viresh.kumar@linaro.org Date: Tue, 15 Apr 2014 10:54:41 +0530 Subject: tick-sched: Check tick_nohz_enabled in tick_nohz_switch_to_nohz()

commit 27630532ef5ead28b98cfe28d8f95222ef91c2b7 upstream.

Since commit d689fe222 (NOHZ: Check for nohz active instead of nohz enabled) the tick_nohz_switch_to_nohz() function returns because it checks for the tick_nohz_active flag. This can't be set, because the function itself sets it.

Undo the change in tick_nohz_switch_to_nohz().

Signed-off-by: Viresh Kumar viresh.kumar@linaro.org Cc: linaro-kernel@lists.linaro.org Cc: fweisbec@gmail.com Cc: Arvind.Chauhan@arm.com Cc: linaro-networking@linaro.org Link: http://lkml.kernel.org/r/40939c05f2d65d781b92b20302b02243d0654224.1397537987... Signed-off-by: Thomas Gleixner tglx@linutronix.de Signed-off-by: Kamal Mostafa kamal@canonical.com --- kernel/time/tick-sched.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c index ea20f7d..29b063b 100644 --- a/kernel/time/tick-sched.c +++ b/kernel/time/tick-sched.c @@ -970,7 +970,7 @@ static void tick_nohz_switch_to_nohz(void) struct tick_sched *ts = &__get_cpu_var(tick_cpu_sched); ktime_t next;

- if (!tick_nohz_active) + if (!tick_nohz_enabled) return;

local_irq_disable(); -- 1.9.1