tree 550195cb1a2ed58bc343e9a4f54d773e8abd5f90
parent 6a55617ed5d1aa62b850de2cf66f5ede2eef4825
author Miao Xie <miaox@cn.fujitsu.com> 1219275458 -0700
committer Ingo Molnar <mingo@elte.hu> 1219305246 +0200

nohz: fix wrong event handler after online an offlined cpu

On the tickless system(CONFIG_NO_HZ=y and CONFIG_HIGH_RES_TIMERS=n), after
I made an offlined cpu online, I found this cpu's event handler was
tick_handle_periodic, not tick_nohz_handler.

After debuging, I found this bug was caused by the wrong tick mode.  the
tick mode is not changed to NOHZ_MODE_INACTIVE when the cpu is offline.

This patch fixes this bug.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>