Messages in this thread Patch in this message | | | From | Radim Krčmář <> | Subject | [PATCH v2 5/5] static_key: improve deferred inc behavior | Date | Sat, 7 Dec 2013 01:40:06 +0100 |
| |
We can cancel deferred static_key_slow_dec() instead of increasing .enabled.counter.
Timer now won't fire before 'timeout' since the last increase, so this patch further stabilizes the case of frequent switching.
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com> --- kernel/jump_label.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/kernel/jump_label.c b/kernel/jump_label.c index bd7ad31..9b57261 100644 --- a/kernel/jump_label.c +++ b/kernel/jump_label.c @@ -79,7 +79,8 @@ void static_key_slow_inc_deferred(struct static_key_deferred *key) STATIC_KEY_CHECK_USE(); if (atomic_dec_if_positive(&key->enabled_debt) >= 0) return; - static_key_slow_inc(&key->key); + if (!cancel_delayed_work(&key->work)) + static_key_slow_inc(&key->key); } EXPORT_SYMBOL_GPL(static_key_slow_inc_deferred); -- 1.8.4.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |