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Fix congestion_wait() sync/async vs read/write confusion

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Commit 1faa16d228 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>
This commit is contained in:
Jens Axboe 2009-07-09 14:52:32 +02:00 • committed by Jens Axboe
parent c2cc49a2f8
commit 8aa7e847d8
16 changed files with 43 additions and 40 deletions
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8
include/linux/blkdev.h
View file

@ -779,18 +779,18 @@ extern int sg_scsi_ioctl(struct request_queue *, struct gendisk *, fmode_t,
* congested queues, and wake up anyone who was waiting for requests to be
* put back.
*/
static inline void blk_clear_queue_congested(struct request_queue *q, int rw)
static inline void blk_clear_queue_congested(struct request_queue *q, int sync)
{
clear_bdi_congested(&q->backing_dev_info, rw);
clear_bdi_congested(&q->backing_dev_info, sync);
}
/*
* A queue has just entered congestion. Flag that in the queue's VM-visible
* state flags and increment the global gounter of congested queues.
*/
static inline void blk_set_queue_congested(struct request_queue *q, int rw)
static inline void blk_set_queue_congested(struct request_queue *q, int sync)
{
set_bdi_congested(&q->backing_dev_info, rw);
set_bdi_congested(&q->backing_dev_info, sync);
}
extern void blk_start_queue(struct request_queue *q);