nbd: skip queue freeze when setting size at device startup

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Commit 242a49e5c8 ("nbd: freeze the queue for queue limits updates")
added the freeze to keep in-flight commands from seeing
torn queue_limits.  But at startup the capacity is still 0
(invalidate_disk cleared it) and the write cache is off (the previous
patch cleared it on disconnect, and nbd_set_size sets it back only after
the commit), so submit_bio_noacct() rejects any bio before it reaches
the driver and no I/O is in flight.  Drop the freeze by checking
capacity and write cache state in nbd_set_size.

Reviewed-by: Yu Kuai <yukuai@fygo.io>
Signed-off-by: Yang Erkun <yangerkun@huawei.com>
Link: https://patch.msgid.link/20260805122930.57647-6-yangerkun@huawei.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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This commit is contained in:

Yang Erkun 2026-08-05 20:29:27 +08:00 • committed by Jens Axboe

parent 285908f554

commit db285268df

1 changed files with 5 additions and 1 deletions

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drivers/block/nbd.c

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