From: Tejun Heo Date: Wed, 16 Feb 2011 17:10:19 +0000 (+0100) Subject: workqueue: make sure MAYDAY_INITIAL_TIMEOUT is at least 2 jiffies long X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=3233cdbd9fa347a6d6897a94cc6ed0302ae83c4f;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git workqueue: make sure MAYDAY_INITIAL_TIMEOUT is at least 2 jiffies long MAYDAY_INITIAL_TIMEOUT is defined as HZ / 100 and depending on configuration may end up 0 or 1. Even when it's 1, depending on when the mayday timer is added in the current jiffy interval, it may expire way before a jiffy has passed. Make sure MAYDAY_INITIAL_TIMEOUT is at least two to guarantee that at least a full jiffy has passed before calling rescuers. Signed-off-by: Tejun Heo Reported-by: Ray Jui Cc: stable@kernel.org --- diff --git a/kernel/workqueue.c b/kernel/workqueue.c index 88a3e34f51f6..ee6578b578ad 100644 --- a/kernel/workqueue.c +++ b/kernel/workqueue.c @@ -79,7 +79,9 @@ enum { MAX_IDLE_WORKERS_RATIO = 4, /* 1/4 of busy can be idle */ IDLE_WORKER_TIMEOUT = 300 * HZ, /* keep idle ones for 5 mins */ - MAYDAY_INITIAL_TIMEOUT = HZ / 100, /* call for help after 10ms */ + MAYDAY_INITIAL_TIMEOUT = HZ / 100 >= 2 ? HZ / 100 : 2, + /* call for help after 10ms + (min two ticks) */ MAYDAY_INTERVAL = HZ / 10, /* and then every 100ms */ CREATE_COOLDOWN = HZ, /* time to breath after fail */ TRUSTEE_COOLDOWN = HZ / 10, /* for trustee draining */