From: Weiping Zhang <zhangweiping@didiglobal.com>
To: <axboe@kernel.dk>, <tom.leiming@gmail.com>, <bvanassche@acm.org>,
<hch@infradead.org>
Cc: <linux-block@vger.kernel.org>
Subject: [PATCH v6 2/5] block: save previous hardware queue count before udpate
Date: Thu, 7 May 2020 21:03:56 +0800 [thread overview]
Message-ID: <ada06eff50f5a9efb821210ad514df39d6868bd7.1588856361.git.zhangweiping@didiglobal.com> (raw)
In-Reply-To: <cover.1588856361.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.
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
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 f789b3e1b3ab..a79afbe60ca6 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -3347,11 +3347,11 @@ 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:
--
2.18.2
next prev parent reply other threads:[~2020-05-07 13:04 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-07 13:03 [PATCH v6 0/5] Fix potential kernel panic when increase hardware queue Weiping Zhang
2020-05-07 13:03 ` [PATCH v6 1/5] block: free both rq_map and request Weiping Zhang
2020-05-07 15:09 ` Hannes Reinecke
2020-05-07 13:03 ` Weiping Zhang [this message]
2020-05-07 15:09 ` [PATCH v6 2/5] block: save previous hardware queue count before udpate Hannes Reinecke
2020-05-07 13:04 ` [PATCH v6 3/5] block: alloc map and request for new hardware queue Weiping Zhang
2020-05-07 15:11 ` Hannes Reinecke
2020-05-07 13:04 ` [PATCH v6 4/5] block: rename __blk_mq_alloc_rq_map Weiping Zhang
2020-05-07 15:12 ` Hannes Reinecke
2020-05-07 13:04 ` [PATCH v6 5/5] block: rename blk_mq_alloc_rq_maps Weiping Zhang
2020-05-07 15:12 ` Hannes Reinecke
2020-05-07 13:43 ` [PATCH v6 0/5] Fix potential kernel panic when increase hardware queue Christoph Hellwig
2020-05-07 18:31 ` Jens Axboe
2020-05-12 1:30 ` Bart Van Assche
2020-05-12 12:09 ` Weiping Zhang
2020-05-12 12:20 ` Weiping Zhang
2020-05-12 23:08 ` Bart Van Assche
2020-05-13 0:43 ` Weiping Zhang
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=ada06eff50f5a9efb821210ad514df39d6868bd7.1588856361.git.zhangweiping@didiglobal.com \
--to=zhangweiping@didiglobal.com \
--cc=axboe@kernel.dk \
--cc=bvanassche@acm.org \
--cc=hch@infradead.org \
--cc=linux-block@vger.kernel.org \
--cc=tom.leiming@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).