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| author | Christoph Hellwig <hch@lst.de> | 2015-11-26 09:13:05 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2015-12-01 10:53:59 -0700 |
| commit | 6f3b0e8bcf3cbb87a7459b3ed018d31d918df3f8 (patch) | |
| tree | 78520f9313db6743cb1ba6feb805120e80113a8d /block/blk-core.c | |
| parent | d7cf931dd9f18ce8ee7a0a9b7813a19fb2c8f5e9 (diff) | |
| download | lwn-6f3b0e8bcf3cbb87a7459b3ed018d31d918df3f8.tar.gz lwn-6f3b0e8bcf3cbb87a7459b3ed018d31d918df3f8.zip | |
blk-mq: add a flags parameter to blk_mq_alloc_request
We already have the reserved flag, and a nowait flag awkwardly encoded as
a gfp_t. Add a real flags argument to make the scheme more extensible and
allow for a nicer calling convention.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/blk-core.c')
| -rw-r--r-- | block/blk-core.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/block/blk-core.c b/block/blk-core.c index c88a946eca49..5ec996036e16 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -630,7 +630,7 @@ struct request_queue *blk_alloc_queue(gfp_t gfp_mask) } EXPORT_SYMBOL(blk_alloc_queue); -int blk_queue_enter(struct request_queue *q, gfp_t gfp) +int blk_queue_enter(struct request_queue *q, bool nowait) { while (true) { int ret; @@ -638,7 +638,7 @@ int blk_queue_enter(struct request_queue *q, gfp_t gfp) if (percpu_ref_tryget_live(&q->q_usage_counter)) return 0; - if (!gfpflags_allow_blocking(gfp)) + if (nowait) return -EBUSY; ret = wait_event_interruptible(q->mq_freeze_wq, @@ -1276,7 +1276,9 @@ static struct request *blk_old_get_request(struct request_queue *q, int rw, struct request *blk_get_request(struct request_queue *q, int rw, gfp_t gfp_mask) { if (q->mq_ops) - return blk_mq_alloc_request(q, rw, gfp_mask, false); + return blk_mq_alloc_request(q, rw, + (gfp_mask & __GFP_DIRECT_RECLAIM) ? + 0 : BLK_MQ_REQ_NOWAIT); else return blk_old_get_request(q, rw, gfp_mask); } @@ -2044,8 +2046,7 @@ blk_qc_t generic_make_request(struct bio *bio) do { struct request_queue *q = bdev_get_queue(bio->bi_bdev); - if (likely(blk_queue_enter(q, __GFP_DIRECT_RECLAIM) == 0)) { - + if (likely(blk_queue_enter(q, false) == 0)) { ret = q->make_request_fn(q, bio); blk_queue_exit(q); |