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| author | Alan Stern <stern@rowland.harvard.edu> | 2008-11-06 08:42:49 +0100 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2008-11-06 08:42:49 +0100 |
| commit | 7838c15b8dd18e78a523513749e5b54bda07b0cb (patch) | |
| tree | 7fa295ce51f263c55756d3693f5f5ed7beb68a87 /block | |
| parent | 9c133c469d38043d5aadaa03f2fb840d88d1cf4f (diff) | |
| download | linux-7838c15b8dd18e78a523513749e5b54bda07b0cb.tar.bz2 | |
Block: use round_jiffies_up()
This patch (as1159b) changes the timeout routines in the block core to
use round_jiffies_up(). There's no point in rounding the timer
deadline down, since if it expires too early we will have to restart
it.
The patch also removes some unnecessary tests when a request is
removed from the queue's timer list.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'block')
| -rw-r--r-- | block/blk-timeout.c | 20 |
1 files changed, 3 insertions, 17 deletions
diff --git a/block/blk-timeout.c b/block/blk-timeout.c index 972a63f848fb..69185ea9fae2 100644 --- a/block/blk-timeout.c +++ b/block/blk-timeout.c @@ -75,14 +75,7 @@ void blk_delete_timer(struct request *req) { struct request_queue *q = req->q; - /* - * Nothing to detach - */ - if (!q->rq_timed_out_fn || !req->deadline) - return; - list_del_init(&req->timeout_list); - if (list_empty(&q->timeout_list)) del_timer(&q->timeout); } @@ -142,7 +135,7 @@ void blk_rq_timed_out_timer(unsigned long data) } if (next_set && !list_empty(&q->timeout_list)) - mod_timer(&q->timeout, round_jiffies(next)); + mod_timer(&q->timeout, round_jiffies_up(next)); spin_unlock_irqrestore(q->queue_lock, flags); } @@ -198,17 +191,10 @@ void blk_add_timer(struct request *req) /* * If the timer isn't already pending or this timeout is earlier - * than an existing one, modify the timer. Round to next nearest + * than an existing one, modify the timer. Round up to next nearest * second. */ - expiry = round_jiffies(req->deadline); - - /* - * We use ->deadline == 0 to detect whether a timer was added or - * not, so just increase to next jiffy for that specific case - */ - if (unlikely(!req->deadline)) - req->deadline = 1; + expiry = round_jiffies_up(req->deadline); if (!timer_pending(&q->timeout) || time_before(expiry, q->timeout.expires)) |