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authorPaul E. McKenney <paul.mckenney@linaro.org>2012-06-24 21:15:02 +0400
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2012-07-02 23:34:43 +0400
commit9d2ad24306f2fafc3612e5a216aab31f9e56e879 (patch)
tree6ced8145e842e29aaedda3d9453c74b6f0c92b4f /kernel/time
parent4fa3b6cb1bc8c14b81b4c8ffdfd3f2500a7e9367 (diff)
downloadlinux-9d2ad24306f2fafc3612e5a216aab31f9e56e879.tar.xz
rcu: Make RCU_FAST_NO_HZ respect nohz= boot parameter
If the nohz= boot parameter disables nohz, then RCU_FAST_NO_HZ needs to also disable itself. This commit therefore checks for tick_nohz_enabled being zero, disabling rcu_prepare_for_idle() if so. This commit assumes that tick_nohz_enabled can change at runtime: If this is not the case, then a simpler approach suffices. Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/time')
-rw-r--r--kernel/time/tick-sched.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index 869997833928..66ff07f6184c 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -105,7 +105,7 @@ static ktime_t tick_init_jiffy_update(void)
/*
* NO HZ enabled ?
*/
-static int tick_nohz_enabled __read_mostly = 1;
+int tick_nohz_enabled __read_mostly = 1;
/*
* Enable / Disable tickless mode