From: Weiping Zhang <zhangweiping@didiglobal.com>
To: <axboe@kernel.dk>, <bvanassche@acm.org>
Cc: <linux-block@vger.kernel.org>
Subject: [PATCH v3 5/7] block: save previous hardware queue count before udpate
Date: Tue, 7 Apr 2020 03:37:04 +0800 [thread overview]
Message-ID: <59933060f4b91d5cacd7b5ef1ac937b06c53b442.1586199103.git.zhangweiping@didiglobal.com> (raw)
In-Reply-To: <cover.1586199103.git.zhangweiping@didiglobal.com>
blk_mq_realloc_tag_set_tags will update set->nr_hw_queues, so
save old set->nr_hw_queues before call this function.
Signed-off-by: Weiping Zhang <zhangweiping@didiglobal.com>
---
block/blk-mq.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 406df9ce9b55..df243c19a158 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -3342,11 +3342,11 @@ static void __blk_mq_update_nr_hw_queues(struct blk_mq_tag_set *set,
blk_mq_sysfs_unregister(q);
}
+ prev_nr_hw_queues = set->nr_hw_queues;
if (blk_mq_realloc_tag_set_tags(set, set->nr_hw_queues, nr_hw_queues) <
0)
goto reregister;
- prev_nr_hw_queues = set->nr_hw_queues;
set->nr_hw_queues = nr_hw_queues;
blk_mq_update_queue_map(set);
fallback:
--
2.18.1
next prev parent reply other threads:[~2020-04-06 19:37 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-06 19:35 [PATCH v3 0/7] Fix potential kernel panic when increase hardware queue Weiping Zhang
2020-04-06 19:36 ` [PATCH v3 1/7] block: rename __blk_mq_alloc_rq_map Weiping Zhang
2020-04-20 20:41 ` Bart Van Assche
2020-04-21 1:25 ` Ming Lei
2020-04-21 13:17 ` weiping zhang
2020-04-06 19:36 ` [PATCH v3 2/7] block: rename __blk_mq_alloc_rq_maps Weiping Zhang
2020-04-20 20:46 ` Bart Van Assche
2020-04-06 19:36 ` [PATCH v3 3/7] block: rename blk_mq_alloc_rq_maps Weiping Zhang
2020-04-20 20:47 ` Bart Van Assche
2020-04-06 19:36 ` [PATCH v3 4/7] block: free both map and request Weiping Zhang
2020-04-20 20:58 ` Bart Van Assche
2020-04-21 13:15 ` weiping zhang
2020-04-06 19:37 ` Weiping Zhang [this message]
2020-04-20 21:00 ` [PATCH v3 5/7] block: save previous hardware queue count before udpate Bart Van Assche
2020-04-06 19:37 ` [PATCH v3 6/7] block: refactor __blk_mq_alloc_rq_map_and_requests Weiping Zhang
2020-04-20 21:07 ` Bart Van Assche
2020-04-21 13:24 ` weiping zhang
2020-04-06 19:37 ` [PATCH v3 7/7] block: alloc map and request for new hardware queue Weiping Zhang
2020-04-08 12:25 ` [PATCH v3 0/7] Fix potential kernel panic when increase " Weiping Zhang
2020-04-20 11:15 ` Weiping Zhang
2020-04-20 19:30 ` Jens Axboe
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