diff options
| author | Christoph Hellwig <hch@lst.de> | 2014-05-28 08:08:02 -0600 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2014-05-28 08:08:02 -0600 |
| commit | 6fca6a611c27f1f0d90fbe1cc3c229dbf8c09e48 (patch) | |
| tree | d3348f3ab1169db9b5a1fca67a8fd2164152530c /include/linux/blk-mq.h | |
| parent | 7738dac4f697ffbd0ed4c4aeb69a714ef9d876da (diff) | |
| download | blackbird-op-linux-6fca6a611c27f1f0d90fbe1cc3c229dbf8c09e48.tar.gz blackbird-op-linux-6fca6a611c27f1f0d90fbe1cc3c229dbf8c09e48.zip | |
blk-mq: add helper to insert requests from irq context
Both the cache flush state machine and the SCSI midlayer want to submit
requests from irq context, and the current per-request requeue_work
unfortunately causes corruption due to sharing with the csd field for
flushes. Replace them with a per-request_queue list of requests to
be requeued.
Based on an earlier test by Ming Lei.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reported-by: Ming Lei <tom.leiming@gmail.com>
Tested-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'include/linux/blk-mq.h')
| -rw-r--r-- | include/linux/blk-mq.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h index 5b171fbe95c5..b9a74a386dbc 100644 --- a/include/linux/blk-mq.h +++ b/include/linux/blk-mq.h @@ -172,6 +172,8 @@ void blk_mq_end_io(struct request *rq, int error); void __blk_mq_end_io(struct request *rq, int error); void blk_mq_requeue_request(struct request *rq); +void blk_mq_add_to_requeue_list(struct request *rq, bool at_head); +void blk_mq_kick_requeue_list(struct request_queue *q); void blk_mq_complete_request(struct request *rq); void blk_mq_stop_hw_queue(struct blk_mq_hw_ctx *hctx); |
