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| author | Tejun Heo <tj@kernel.org> | 2011-02-16 20:10:19 +0300 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2011-02-16 20:10:19 +0300 |
| commit | 3233cdbd9fa347a6d6897a94cc6ed0302ae83c4f (patch) | |
| tree | 053948a81cb40a37d3afbd0f6ca8f3a106523c73 | |
| parent | 58a69cb47ec6991bf006a3e5d202e8571b0327a4 (diff) | |
| download | linux-3233cdbd9fa347a6d6897a94cc6ed0302ae83c4f.tar.xz | |
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 <tj@kernel.org>
Reported-by: Ray Jui <rjui@broadcom.com>
Cc: stable@kernel.org
| -rw-r--r-- | kernel/workqueue.c | 4 |
1 files changed, 3 insertions, 1 deletions
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 */ |