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authorJens Axboe <jens.axboe@oracle.com>2009-07-09 14:52:32 +0200
committerJens Axboe <axboe@carl.(none)>2009-07-10 20:31:53 +0200
commit8aa7e847d834ed937a9ad37a0f2ad5b8584c1ab0 (patch)
tree76c8b4f1362a928d426f2201790ab5d128f57724 /drivers
parentc2cc49a2f8a479dde96a599646d30b6cc9dbed78 (diff)
downloadlinux-8aa7e847d834ed937a9ad37a0f2ad5b8584c1ab0.tar.bz2
Fix congestion_wait() sync/async vs read/write confusion
Commit 1faa16d22877f4839bd433547d770c676d1d964c accidentally broke the bdi congestion wait queue logic, causing us to wait on congestion for WRITE (== 1) when we really wanted BLK_RW_ASYNC (== 0) instead. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/block/pktcdvd.c10
-rw-r--r--drivers/md/dm-crypt.c2
2 files changed, 7 insertions, 5 deletions
diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c
index 83650e00632d..99a506f619b7 100644
--- a/drivers/block/pktcdvd.c
+++ b/drivers/block/pktcdvd.c
@@ -1372,8 +1372,10 @@ try_next_bio:
wakeup = (pd->write_congestion_on > 0
&& pd->bio_queue_size <= pd->write_congestion_off);
spin_unlock(&pd->lock);
- if (wakeup)
- clear_bdi_congested(&pd->disk->queue->backing_dev_info, WRITE);
+ if (wakeup) {
+ clear_bdi_congested(&pd->disk->queue->backing_dev_info,
+ BLK_RW_ASYNC);
+ }
pkt->sleep_time = max(PACKET_WAIT_TIME, 1);
pkt_set_state(pkt, PACKET_WAITING_STATE);
@@ -2592,10 +2594,10 @@ static int pkt_make_request(struct request_queue *q, struct bio *bio)
spin_lock(&pd->lock);
if (pd->write_congestion_on > 0
&& pd->bio_queue_size >= pd->write_congestion_on) {
- set_bdi_congested(&q->backing_dev_info, WRITE);
+ set_bdi_congested(&q->backing_dev_info, BLK_RW_ASYNC);
do {
spin_unlock(&pd->lock);
- congestion_wait(WRITE, HZ);
+ congestion_wait(BLK_RW_ASYNC, HZ);
spin_lock(&pd->lock);
} while(pd->bio_queue_size > pd->write_congestion_off);
}
diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index 9933eb861c71..529e2ba505c3 100644
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -776,7 +776,7 @@ static void kcryptd_crypt_write_convert(struct dm_crypt_io *io)
* But don't wait if split was due to the io size restriction
*/
if (unlikely(out_of_pages))
- congestion_wait(WRITE, HZ/100);
+ congestion_wait(BLK_RW_ASYNC, HZ/100);
/*
* With async crypto it is unsafe to share the crypto context