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| author | Frederic Weisbecker <frederic@kernel.org> | 2017-10-27 05:42:32 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-10-27 10:55:27 +0300 |
| commit | e179f5a04ba46ee5c5439480c2bfd68c358168b7 (patch) | |
| tree | be51371dfbe99861087f3a911b66f7dc8c7e9d6e /include/linux/sched/isolation.h | |
| parent | 7e56a1cf4b28f5739526877b8dbad623fae2e4e7 (diff) | |
| download | linux-e179f5a04ba46ee5c5439480c2bfd68c358168b7.tar.xz | |
sched/isolation: Use its own static key
Housekeeping code still depends on the nohz_full static key. Since we want
to decouple housekeeping from NOHZ, let's create a housekeeping specific
static key.
It's mostly relevant for calls to is_housekeeping_cpu() from the scheduler.
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Chris Metcalf <cmetcalf@mellanox.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Luiz Capitulino <lcapitulino@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Wanpeng Li <kernellwp@gmail.com>
Link: http://lkml.kernel.org/r/1509072159-31808-6-git-send-email-frederic@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/sched/isolation.h')
| -rw-r--r-- | include/linux/sched/isolation.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/sched/isolation.h b/include/linux/sched/isolation.h index ed935ffc6ffa..194c586fbb12 100644 --- a/include/linux/sched/isolation.h +++ b/include/linux/sched/isolation.h @@ -6,6 +6,7 @@ #include <linux/tick.h> #ifdef CONFIG_NO_HZ_FULL +DECLARE_STATIC_KEY_FALSE(housekeeping_overriden); extern int housekeeping_any_cpu(void); extern const struct cpumask *housekeeping_cpumask(void); extern void housekeeping_affine(struct task_struct *t); @@ -31,7 +32,7 @@ static inline void housekeeping_init(void) { } static inline bool is_housekeeping_cpu(int cpu) { #ifdef CONFIG_NO_HZ_FULL - if (tick_nohz_full_enabled()) + if (static_branch_unlikely(&housekeeping_overriden)) return housekeeping_test_cpu(cpu); #endif return true; |