From: Ming Lei <ming.lei@redhat.com>
To: Christoph Hellwig <hch@lst.de>
Cc: Jens Axboe <axboe@kernel.dk>,
linux-block@vger.kernel.org, ming.lei@redhat.com
Subject: Re: [PATCH 8/8] ublk: defer disk allocation
Date: Thu, 21 Jul 2022 15:55:20 +0800 [thread overview]
Message-ID: <YtkGaEpNXdlek3Lz@T590> (raw)
In-Reply-To: <20220721051632.1676890-9-hch@lst.de>
On Thu, Jul 21, 2022 at 07:16:32AM +0200, Christoph Hellwig wrote:
> Defer allocating the gendisk and request_queue until UBLK_CMD_START_DEV
> is called. This avoids funky life times where a disk is allocated
> and then can be added and removed multiple times, which has never been
> supported by the block layer.
As commented in last patch, tagset can be allocated once for retrieving
affinity reliably from tagset's map instead of building it via
blk_mq_map_queues() before allocating tagset, meantime the code gets
simplified.
Then you can still allocate queue/disk together.
Thanks,
Ming
next prev parent reply other threads:[~2022-07-21 7:55 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-21 5:16 ublk fixups Christoph Hellwig
2022-07-21 5:16 ` [PATCH 1/8] ublk: add a MAINTAINERS entry Christoph Hellwig
2022-07-21 7:11 ` Ming Lei
2022-07-21 5:16 ` [PATCH 2/8] ublk: remove UBLK_IO_F_PREFLUSH Christoph Hellwig
2022-07-21 7:13 ` Ming Lei
2022-07-21 5:16 ` [PATCH 3/8] ublk: remove the empty open and release block device operations Christoph Hellwig
2022-07-21 7:13 ` Ming Lei
2022-07-21 5:16 ` [PATCH 4/8] ublk: simplify ublk_ch_open and ublk_ch_release Christoph Hellwig
2022-07-21 7:15 ` Ming Lei
2022-07-21 5:16 ` [PATCH 5/8] ublk: cleanup ublk_ctrl_uring_cmd Christoph Hellwig
2022-07-21 7:19 ` Ziyang Zhang
2022-07-21 12:12 ` Ming Lei
2022-07-21 5:16 ` [PATCH 6/8] ublk: fold __ublk_create_dev into ublk_ctrl_add_dev Christoph Hellwig
2022-07-21 7:33 ` Ziyang Zhang
2022-07-21 7:35 ` Ming Lei
2022-07-21 5:16 ` [PATCH 7/8] ublk: rewrite ublk_ctrl_get_queue_affinity to not rely on hctx->cpumask Christoph Hellwig
2022-07-21 7:38 ` Ming Lei
2022-07-21 5:16 ` [PATCH 8/8] ublk: defer disk allocation Christoph Hellwig
2022-07-21 7:55 ` Ming Lei [this message]
-- strict thread matches above, loose matches on Subject: below --
2022-07-21 13:09 ublk fixups v2 Christoph Hellwig
2022-07-21 13:09 ` [PATCH 8/8] ublk: defer disk allocation Christoph Hellwig
2022-07-21 14:29 ` Ming Lei
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