diff options
| author |   Bart Van Assche <bvanassche@acm.org> | 2019-07-01 08:47:29 -0700 |
|---|---|---|
| committer |   Jens Axboe <axboe@kernel.dk> | 2019-07-02 21:03:27 -0600 |
| commit | c05f42206f4de12b6807270fc669b45472f1bdb7 (patch) | |
| tree | 82aaf5161958336f8ef635f9f7a8daaeddad7f64 /block/blk-mq-sched.c | |
| parent | sbitmap: Replace cmpxchg with xchg (diff) | |
| download | linux-dev-c05f42206f4de12b6807270fc669b45472f1bdb7.tar.xz linux-dev-c05f42206f4de12b6807270fc669b45472f1bdb7.zip | |
blk-mq: remove blk_mq_put_ctx()
No code that occurs between blk_mq_get_ctx() and blk_mq_put_ctx() depends
on preemption being disabled for its correctness. Since removing the CPU
preemption calls does not measurably affect performance, simplify the
blk-mq code by removing the blk_mq_put_ctx() function and also by not
disabling preemption in blk_mq_get_ctx().
Cc: Hannes Reinecke <hare@suse.com>
Cc: Omar Sandoval <osandov@fb.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-mq-sched.c')
| -rw-r--r-- | block/blk-mq-sched.c | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/block/blk-mq-sched.c b/block/blk-mq-sched.c index 956a7aa9a637..c9d183d6c499 100644 --- a/block/blk-mq-sched.c +++ b/block/blk-mq-sched.c @@ -330,10 +330,8 @@ bool __blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio, bool ret = false; enum hctx_type type; - if (e && e->type->ops.bio_merge) { - blk_mq_put_ctx(ctx); + if (e && e->type->ops.bio_merge) return e->type->ops.bio_merge(hctx, bio, nr_segs); - } type = hctx->type; if ((hctx->flags & BLK_MQ_F_SHOULD_MERGE) && @@ -344,7 +342,6 @@ bool __blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio, spin_unlock(&ctx->lock); } - blk_mq_put_ctx(ctx); return ret; } |