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| author | Nick Piggin <nickpiggin@yahoo.com.au> | 2007-05-08 00:26:34 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-08 11:15:03 -0700 |
| commit | c6a632a2b610c1bc123f1d258d688e8fe5cc70dd (patch) | |
| tree | b43e9dffcc1ad012955483f22141676f199f6930 /block | |
| parent | e97cb3e28ce2fdd3b06a65f67d00462d86929008 (diff) | |
| download | lwn-c6a632a2b610c1bc123f1d258d688e8fe5cc70dd.tar.gz lwn-c6a632a2b610c1bc123f1d258d688e8fe5cc70dd.zip | |
as: fix antic_expire check
Fix units mismatch (jiffies vs msecs) in as-iosched.c, spotted by Xiaoning
Ding <dingxn@cse.ohio-state.edu>.
Signed-off-by: Nick Piggin <npiggin@suse.de>
Cc: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'block')
| -rw-r--r-- | block/as-iosched.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/block/as-iosched.c b/block/as-iosched.c index ef126277b4b3..640aa839d63f 100644 --- a/block/as-iosched.c +++ b/block/as-iosched.c @@ -569,7 +569,7 @@ static void as_update_iohist(struct as_data *ad, struct as_io_context *aic, static int as_close_req(struct as_data *ad, struct as_io_context *aic, struct request *rq) { - unsigned long delay; /* milliseconds */ + unsigned long delay; /* jiffies */ sector_t last = ad->last_sector[ad->batch_data_dir]; sector_t next = rq->sector; sector_t delta; /* acceptable close offset (in sectors) */ @@ -578,11 +578,11 @@ static int as_close_req(struct as_data *ad, struct as_io_context *aic, if (ad->antic_status == ANTIC_OFF || !ad->ioc_finished) delay = 0; else - delay = ((jiffies - ad->antic_start) * 1000) / HZ; + delay = jiffies - ad->antic_start; if (delay == 0) delta = 8192; - else if (delay <= 20 && delay <= ad->antic_expire) + else if (delay <= (20 * HZ / 1000) && delay <= ad->antic_expire) delta = 8192 << delay; else return 1; |