From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752175AbaIGIjl (ORCPT ); Sun, 7 Sep 2014 04:39:41 -0400 Received: from mail-pd0-f178.google.com ([209.85.192.178]:53318 "EHLO mail-pd0-f178.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751951AbaIGIjg (ORCPT ); Sun, 7 Sep 2014 04:39:36 -0400 From: Ming Lei To: Jens Axboe , linux-kernel@vger.kernel.org Cc: linux-scsi@vger.kernel.org, Christoph Hellwig , Ming Lei Subject: [PATCH 1/6] blk-mq: allocate flush_rq in blk_mq_init_flush() Date: Sun, 7 Sep 2014 16:39:17 +0800 Message-Id: <1410079162-9872-2-git-send-email-ming.lei@canonical.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1410079162-9872-1-git-send-email-ming.lei@canonical.com> References: <1410079162-9872-1-git-send-email-ming.lei@canonical.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org It is reasonable to allocate flush req in blk_mq_init_flush(). Signed-off-by: Ming Lei --- block/blk-flush.c | 11 ++++++++++- block/blk-mq.c | 16 ++++++---------- block/blk-mq.h | 2 +- 3 files changed, 17 insertions(+), 12 deletions(-) diff --git a/block/blk-flush.c b/block/blk-flush.c index 3cb5e9e..75ca6cd0 100644 --- a/block/blk-flush.c +++ b/block/blk-flush.c @@ -474,7 +474,16 @@ int blkdev_issue_flush(struct block_device *bdev, gfp_t gfp_mask, } EXPORT_SYMBOL(blkdev_issue_flush); -void blk_mq_init_flush(struct request_queue *q) +int blk_mq_init_flush(struct request_queue *q) { + struct blk_mq_tag_set *set = q->tag_set; + spin_lock_init(&q->mq_flush_lock); + + q->flush_rq = kzalloc(round_up(sizeof(struct request) + + set->cmd_size, cache_line_size()), + GFP_KERNEL); + if (!q->flush_rq) + return -ENOMEM; + return 0; } diff --git a/block/blk-mq.c b/block/blk-mq.c index 4aac826..23386c0 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -1826,17 +1826,10 @@ struct request_queue *blk_mq_init_queue(struct blk_mq_tag_set *set) if (set->ops->complete) blk_queue_softirq_done(q, set->ops->complete); - blk_mq_init_flush(q); blk_mq_init_cpu_queues(q, set->nr_hw_queues); - q->flush_rq = kzalloc(round_up(sizeof(struct request) + - set->cmd_size, cache_line_size()), - GFP_KERNEL); - if (!q->flush_rq) - goto err_hw; - if (blk_mq_init_hw_queues(q, set)) - goto err_flush_rq; + goto err_hw; mutex_lock(&all_q_mutex); list_add_tail(&q->all_q_node, &all_q_list); @@ -1844,12 +1837,15 @@ struct request_queue *blk_mq_init_queue(struct blk_mq_tag_set *set) blk_mq_add_queue_tag_set(set, q); + if (blk_mq_init_flush(q)) + goto err_hw_queues; + blk_mq_map_swqueue(q); return q; -err_flush_rq: - kfree(q->flush_rq); +err_hw_queues: + blk_mq_exit_hw_queues(q, set, set->nr_hw_queues); err_hw: blk_cleanup_queue(q); err_hctxs: diff --git a/block/blk-mq.h b/block/blk-mq.h index ca4964a..b0bd9bc 100644 --- a/block/blk-mq.h +++ b/block/blk-mq.h @@ -27,7 +27,7 @@ struct blk_mq_ctx { void __blk_mq_complete_request(struct request *rq); void blk_mq_run_hw_queue(struct blk_mq_hw_ctx *hctx, bool async); -void blk_mq_init_flush(struct request_queue *q); +int blk_mq_init_flush(struct request_queue *q); void blk_mq_freeze_queue(struct request_queue *q); void blk_mq_free_queue(struct request_queue *q); void blk_mq_clone_flush_request(struct request *flush_rq, -- 1.7.9.5