From: Ming Lei <ming.lei@redhat.com>
To: Jens Axboe <axboe@fb.com>,
linux-block@vger.kernel.org,
Christoph Hellwig <hch@infradead.org>
Cc: Bart Van Assche <bart.vanassche@sandisk.com>,
Ming Lei <ming.lei@redhat.com>
Subject: [PATCH v2 2/8] block: introduce flag of QUEUE_FLAG_QUIESCED
Date: Sat, 27 May 2017 22:21:20 +0800 [thread overview]
Message-ID: <20170527142126.26079-3-ming.lei@redhat.com> (raw)
In-Reply-To: <20170527142126.26079-1-ming.lei@redhat.com>
This flag is introduced for fixing & improving the quiescing code.
Signed-off-by: Ming Lei <ming.lei@redhat.com>
---
include/linux/blkdev.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 41291be82ac4..60967797f4f6 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -618,6 +618,7 @@ struct request_queue {
#define QUEUE_FLAG_STATS 27 /* track rq completion times */
#define QUEUE_FLAG_POLL_STATS 28 /* collecting stats for hybrid polling */
#define QUEUE_FLAG_REGISTERED 29 /* queue has been registered to a disk */
+#define QUEUE_FLAG_QUIESCED 30 /* queue has been quiesced */
#define QUEUE_FLAG_DEFAULT ((1 << QUEUE_FLAG_IO_STAT) | \
(1 << QUEUE_FLAG_STACKABLE) | \
@@ -712,6 +713,7 @@ static inline void queue_flag_clear(unsigned int flag, struct request_queue *q)
#define blk_noretry_request(rq) \
((rq)->cmd_flags & (REQ_FAILFAST_DEV|REQ_FAILFAST_TRANSPORT| \
REQ_FAILFAST_DRIVER))
+#define blk_queue_quiesced(q) test_bit(QUEUE_FLAG_QUIESCED, &(q)->queue_flags)
static inline bool blk_account_rq(struct request *rq)
{
--
2.9.4
next prev parent reply other threads:[~2017-05-27 14:22 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-27 14:21 [PATCH v2 0/8] blk-mq: fix & improve queue quiescing Ming Lei
2017-05-27 14:21 ` [PATCH v2 1/8] blk-mq: introduce blk_mq_unquiesce_queue Ming Lei
2017-05-30 15:09 ` Bart Van Assche
2017-05-27 14:21 ` Ming Lei [this message]
2017-05-30 15:11 ` [PATCH v2 2/8] block: introduce flag of QUEUE_FLAG_QUIESCED Bart Van Assche
2017-05-27 14:21 ` [PATCH v2 3/8] blk-mq: use the introduced blk_mq_unquiesce_queue() Ming Lei
2017-05-27 14:21 ` Ming Lei
2017-05-30 15:12 ` Bart Van Assche
2017-05-30 15:12 ` Bart Van Assche
2017-05-30 15:12 ` Bart Van Assche
2017-05-31 2:29 ` Ming Lei
2017-05-31 2:29 ` Ming Lei
2017-05-30 19:04 ` Eduardo Valentin
2017-05-30 19:04 ` Eduardo Valentin
2017-05-30 19:04 ` Eduardo Valentin
2017-05-31 2:28 ` Ming Lei
2017-05-31 2:28 ` Ming Lei
2017-05-27 14:21 ` [PATCH v2 4/8] blk-mq: fix blk_mq_quiesce_queue Ming Lei
2017-05-27 21:46 ` Bart Van Assche
2017-05-28 10:44 ` Ming Lei
2017-05-28 16:10 ` Bart Van Assche
2017-05-30 0:22 ` Ming Lei
2017-05-30 16:54 ` Bart Van Assche
2017-05-31 2:38 ` Ming Lei
2017-05-30 19:23 ` Bart Van Assche
2017-05-31 2:52 ` Ming Lei
2017-05-27 14:21 ` [PATCH v2 5/8] blk-mq: update comments on blk_mq_quiesce_queue() Ming Lei
2017-05-30 17:14 ` Bart Van Assche
2017-05-31 9:51 ` Ming Lei
2017-05-27 14:21 ` [PATCH v2 6/8] blk-mq: don't stop queue for quiescing Ming Lei
2017-05-27 21:49 ` Bart Van Assche
2017-05-28 10:50 ` Ming Lei
2017-05-28 16:03 ` Bart Van Assche
2017-05-30 0:27 ` Ming Lei
2017-05-30 17:02 ` Bart Van Assche
2017-05-31 2:55 ` Ming Lei
2017-05-27 14:21 ` [PATCH v2 7/8] blk-mq: clarify dispatch may not be drained/blocked by stopping queue Ming Lei
2017-05-27 14:21 ` [PATCH v2 8/8] Revert "blk-mq: don't use sync workqueue flushing from drivers" Ming Lei
2017-05-27 21:32 ` [PATCH v2 0/8] blk-mq: fix & improve queue quiescing Bart Van Assche
2017-05-28 11:11 ` Ming Lei
2017-05-28 16:01 ` Bart Van Assche
2017-05-30 0:34 ` Ming Lei
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