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| author | Paul E. McKenney <paul.mckenney@linaro.org> | 2011-03-26 22:01:35 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2011-05-05 23:16:59 -0700 |
| commit | baa1ae0c9f1c618bc60706efa75fef3508bcee58 (patch) | |
| tree | e9a4558a3fcef41e42477d6461ccf655d01d5432 /kernel | |
| parent | 9ab1544eb4196ca8d05c433b2eb56f74496b1ee3 (diff) | |
| download | linux-baa1ae0c9f1c618bc60706efa75fef3508bcee58.tar.bz2 | |
rcu: further lower priority in rcu_yield()
Although rcu_yield() dropped from real-time to normal priority, there
is always the possibility that the competing tasks have been niced.
So nice to 19 in rcu_yield() to help ensure that other tasks have a
better chance of running.
Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/rcutree.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/rcutree.c b/kernel/rcutree.c index 2c07adb97088..fe85600ba8c2 100644 --- a/kernel/rcutree.c +++ b/kernel/rcutree.c @@ -1561,6 +1561,7 @@ static void rcu_yield(void (*f)(unsigned long), unsigned long arg) mod_timer(&yield_timer, jiffies + 2); sp.sched_priority = 0; sched_setscheduler_nocheck(current, SCHED_NORMAL, &sp); + set_user_nice(current, 19); schedule(); sp.sched_priority = RCU_KTHREAD_PRIO; sched_setscheduler_nocheck(current, SCHED_FIFO, &sp); |