diff options
| author | Wanpeng Li <wanpengli@tencent.com> | 2019-06-28 16:51:41 +0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2019-07-25 15:51:55 +0200 |
| commit | e0e8d4911ed2695b12c3a01c15634000ede9bc73 (patch) | |
| tree | b8979a4489332dc02e52988d52396627ab263fd6 /kernel/sched/isolation.c | |
| parent | 65d74e91694e1afac40c96fb64a9ef120757729e (diff) | |
sched/isolation: Prefer housekeeping CPU in local node
In real product setup, there will be houseeking CPUs in each nodes, it
is prefer to do housekeeping from local node, fallback to global online
cpumask if failed to find houseeking CPU from local node.
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Frederic Weisbecker <frederic@kernel.org>
Reviewed-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/1561711901-4755-2-git-send-email-wanpengli@tencent.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sched/isolation.c')
| -rw-r--r-- | kernel/sched/isolation.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/kernel/sched/isolation.c b/kernel/sched/isolation.c index ccb28085b114..9fcb2a695a41 100644 --- a/kernel/sched/isolation.c +++ b/kernel/sched/isolation.c @@ -22,9 +22,17 @@ EXPORT_SYMBOL_GPL(housekeeping_enabled); int housekeeping_any_cpu(enum hk_flags flags) { - if (static_branch_unlikely(&housekeeping_overridden)) - if (housekeeping_flags & flags) + int cpu; + + if (static_branch_unlikely(&housekeeping_overridden)) { + if (housekeeping_flags & flags) { + cpu = sched_numa_find_closest(housekeeping_mask, smp_processor_id()); + if (cpu < nr_cpu_ids) + return cpu; + return cpumask_any_and(housekeeping_mask, cpu_online_mask); + } + } return smp_processor_id(); } EXPORT_SYMBOL_GPL(housekeeping_any_cpu); |