From 793597a6a95675f4f85671cf747c1d92e7dbc295 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Tue, 27 May 2014 20:59:49 +0200 Subject: [PATCH] blk-mq: do not use blk_mq_alloc_request_pinned in blk_mq_map_request We already do a non-blocking allocation in blk_mq_map_request, no need to repeat it. Just call __blk_mq_alloc_request to wait directly. Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe --- block/blk-mq.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/block/blk-mq.c b/block/blk-mq.c index 3224888d329a..43f0c8ffa92a 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -1179,12 +1179,14 @@ static struct request *blk_mq_map_request(struct request_queue *q, trace_block_getrq(q, bio, rw); rq = __blk_mq_alloc_request(q, hctx, ctx, rw, GFP_ATOMIC, false); if (unlikely(!rq)) { + __blk_mq_run_hw_queue(hctx); blk_mq_put_ctx(ctx); trace_block_sleeprq(q, bio, rw); - rq = blk_mq_alloc_request_pinned(q, rw, __GFP_WAIT|GFP_ATOMIC, - false); - ctx = rq->mq_ctx; + + ctx = blk_mq_get_ctx(q); hctx = q->mq_ops->map_queue(q, ctx->cpu); + rq = __blk_mq_alloc_request(q, hctx, ctx, rw, + __GFP_WAIT|GFP_ATOMIC, false); } hctx->queued++; -- 2.30.2