From: Weiping Zhang <zhangweiping@didiglobal.com>
To: <axboe@kernel.dk>, <tom.leiming@gmail.com>, <bvanassche@acm.org>
Cc: <linux-block@vger.kernel.org>
Subject: [PATCH v5 2/5] block: save previous hardware queue count before udpate
Date: Tue, 5 May 2020 14:43:28 +0800 [thread overview]
Message-ID: <360dd293fa245d612b85a338a0f6577a9b5dcee8.1588660550.git.zhangweiping@didiglobal.com> (raw)
In-Reply-To: <cover.1588660550.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>
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:
--
2.18.1
next prev parent reply other threads:[~2020-05-05 6:43 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-05 6:43 [PATCH v5 0/5] Fix potential kernel panic when increase hardware queue Weiping Zhang
2020-05-05 6:43 ` [PATCH v5 1/5] block: free both rq_map and request Weiping Zhang
2020-05-07 6:10 ` Christoph Hellwig
2020-05-05 6:43 ` Weiping Zhang [this message]
2020-05-07 6:11 ` [PATCH v5 2/5] block: save previous hardware queue count before udpate Christoph Hellwig
2020-05-05 6:45 ` [PATCH v5 4/5] block: rename __blk_mq_alloc_rq_map Weiping Zhang
2020-05-07 6:11 ` Christoph Hellwig
2020-05-07 12:59 ` Weiping Zhang
2020-05-05 6:46 ` [PATCH v5 5/5] block: rename blk_mq_alloc_rq_maps Weiping Zhang
2020-05-07 6:11 ` Christoph Hellwig
2020-05-05 7:02 ` [PATCH v5 3/5] block: alloc map and request for new hardware queue Weiping Zhang
2020-05-05 7:38 ` [RESEND PATCH " Weiping Zhang
2020-05-07 6:13 ` [PATCH " Christoph Hellwig
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