Messages in this thread Patch in this message | ![/](/images/icornerl.gif) | | From | <> | Subject | [PATCH] rcu: shrink each possible cpu krcp | Date | Fri, 14 Aug 2020 14:45:57 +0800 |
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From: Zqiang <qiang.zhang@windriver.com>
Due to cpu hotplug. some cpu may be offline after call "kfree_call_rcu" func, if the shrinker is triggered at this time, we should drain each possible cpu "krcp".
Signed-off-by: Zqiang <qiang.zhang@windriver.com> --- kernel/rcu/tree.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 8ce77d9ac716..619ccbb3fe4b 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -3443,7 +3443,7 @@ kfree_rcu_shrink_count(struct shrinker *shrink, struct shrink_control *sc) unsigned long count = 0; /* Snapshot count of all CPUs */ - for_each_online_cpu(cpu) { + for_each_possible_cpu(cpu) { struct kfree_rcu_cpu *krcp = per_cpu_ptr(&krc, cpu); count += READ_ONCE(krcp->count); @@ -3458,7 +3458,7 @@ kfree_rcu_shrink_scan(struct shrinker *shrink, struct shrink_control *sc) int cpu, freed = 0; unsigned long flags; - for_each_online_cpu(cpu) { + for_each_possible_cpu(cpu) { int count; struct kfree_rcu_cpu *krcp = per_cpu_ptr(&krc, cpu); @@ -3491,7 +3491,7 @@ void __init kfree_rcu_scheduler_running(void) int cpu; unsigned long flags; - for_each_online_cpu(cpu) { + for_each_possible_cpu(cpu) { struct kfree_rcu_cpu *krcp = per_cpu_ptr(&krc, cpu); raw_spin_lock_irqsave(&krcp->lock, flags); -- 2.17.1
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