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drbd: Do not mod_timer() with a past time

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In case we can not find out why the request takes too long
(happens e.g. when IO got suspended on DRBD level). rearm
the timer with a reasonable value.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
This commit is contained in:
Philipp Reisner 2011-07-15 13:53:06 +02:00
parent 3fb4746d8d
commit 3b03ad5929
1 changed files with 3 additions and 2 deletions
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5
drivers/block/drbd/drbd_req.c
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@ -1083,7 +1083,7 @@ void request_timer_fn(unsigned long data)
struct drbd_request *req; /* oldest request */
struct list_head *le;
struct net_conf *nc;
unsigned long ent = 0, dt = 0, et; /* effective timeout = ko_count * timeout */
unsigned long ent = 0, dt = 0, et, nt; /* effective timeout = ko_count * timeout */
rcu_read_lock();
nc = rcu_dereference(tconn->net_conf);
@ -1122,6 +1122,7 @@ void request_timer_fn(unsigned long data)
__drbd_chk_io_error(mdev, 1);
}
}
nt = (time_is_before_eq_jiffies(req->start_time + et) ? jiffies : req->start_time) + et;
spin_unlock_irq(&tconn->req_lock);
mod_timer(&mdev->request_timer, req->start_time + et);
mod_timer(&mdev->request_timer, nt);
}