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| author | Zqiang <qiang1.zhang@intel.com> | 2022-12-20 22:16:25 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-05-11 23:03:06 +0900 |
| commit | ae6803b66365e00739b3066da8f0f6356e50241f (patch) | |
| tree | 7f16680af5a0b3eff9ab57f2920f9e41f4095be1 /kernel | |
| parent | 05f437eba011a140191b2064561abc45703f8049 (diff) | |
| download | linux-stable-ae6803b66365e00739b3066da8f0f6356e50241f.tar.gz linux-stable-ae6803b66365e00739b3066da8f0f6356e50241f.tar.bz2 linux-stable-ae6803b66365e00739b3066da8f0f6356e50241f.zip | |
rcu: Fix missing TICK_DEP_MASK_RCU_EXP dependency check
[ Upstream commit db7b464df9d820186e98a65aa6a10f0d51fbf8ce ]
This commit adds checks for the TICK_DEP_MASK_RCU_EXP bit, thus enabling
RCU expedited grace periods to actually force-enable scheduling-clock
interrupts on holdout CPUs.
Fixes: df1e849ae455 ("rcu: Enable tick for nohz_full CPUs slow to provide expedited QS")
Signed-off-by: Zqiang <qiang1.zhang@intel.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Anna-Maria Behnsen <anna-maria@linutronix.de>
Acked-by: Frederic Weisbecker <frederic@kernel.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/time/tick-sched.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c index 68d81a4283c8..a46506f7ec6d 100644 --- a/kernel/time/tick-sched.c +++ b/kernel/time/tick-sched.c @@ -281,6 +281,11 @@ static bool check_tick_dependency(atomic_t *dep) return true; } + if (val & TICK_DEP_MASK_RCU_EXP) { + trace_tick_stop(0, TICK_DEP_MASK_RCU_EXP); + return true; + } + return false; } |