From: Christoph Hellwig <hch@lst.de>
To: Ming Lei <ming.lei@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>, Jens Axboe <axboe@kernel.dk>,
"Martin K . Petersen" <martin.petersen@oracle.com>,
linux-block@vger.kernel.org, linux-nvme@lists.infradead.org,
linux-scsi@vger.kernel.org, Bart Van Assche <bvanassche@acm.org>
Subject: Re: [PATCH V2 09/13] scsi: force unfreezing queue into atomic mode
Date: Mon, 24 Jan 2022 14:15:16 +0100 [thread overview]
Message-ID: <20220124131516.GH27269@lst.de> (raw)
In-Reply-To: <20220122111054.1126146-10-ming.lei@redhat.com>
On Sat, Jan 22, 2022 at 07:10:50PM +0800, Ming Lei wrote:
> In scsi_disk_release() request queue is frozen for clearing
> disk->private_data, and there can't be any FS IO issued to
> this queue, and only private passthrough request will be handled, so
> force unfreezing queue into atomic mode.
>
> Signed-off-by: Ming Lei <ming.lei@redhat.com>
> ---
> drivers/scsi/sd.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
> index 0e73c3f2f381..27f04c860f00 100644
> --- a/drivers/scsi/sd.c
> +++ b/drivers/scsi/sd.c
> @@ -3670,7 +3670,7 @@ static void scsi_disk_release(struct device *dev)
> * in case multiple processes open a /dev/sd... node concurrently.
> */
> blk_mq_freeze_queue(q);
> - blk_mq_unfreeze_queue(q);
> + __blk_mq_unfreeze_queue(q, true);
I think the right thing here is to drop the freeze/unfreeze pair.
Now that del_gendisk properly freezes the queue, we don't need this
protection as the issue that Bart fixed with it can't happen any more.
next prev parent reply other threads:[~2022-01-24 13:15 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-22 11:10 [PATCH V2 00/13] block: don't drain file system I/O on del_gendisk Ming Lei
2022-01-22 11:10 ` [PATCH V2 01/13] block: declare blkcg_[init|exit]_queue in private header Ming Lei
2022-01-24 12:59 ` Christoph Hellwig
2022-01-22 11:10 ` [PATCH V2 02/13] block: move initialization of q->blkg_list into blkcg_init_queue Ming Lei
2022-01-24 13:00 ` Christoph Hellwig
2022-01-24 18:32 ` Bart Van Assche
2022-01-22 11:10 ` [PATCH V2 03/13] block: move blkcg initialization/destroy into disk allocation/release handler Ming Lei
2022-01-24 13:02 ` Christoph Hellwig
2022-01-22 11:10 ` [PATCH V2 04/13] block/wbt: fix negative inflight counter when remove scsi device Ming Lei
2022-02-17 7:45 ` Christoph Hellwig
2022-02-17 14:53 ` Jens Axboe
2022-01-22 11:10 ` [PATCH V2 05/13] block: only account passthrough IO from userspace Ming Lei
2022-01-24 13:05 ` Christoph Hellwig
2022-01-24 23:09 ` Ming Lei
2022-01-25 6:16 ` Christoph Hellwig
2022-01-25 7:19 ` Christoph Hellwig
2022-01-25 8:35 ` Ming Lei
2022-01-25 9:09 ` Ming Lei
2022-01-26 5:50 ` Christoph Hellwig
2022-01-26 7:21 ` Ming Lei
2022-01-26 8:10 ` Christoph Hellwig
2022-01-26 8:33 ` Ming Lei
2022-01-26 8:49 ` Christoph Hellwig
2022-01-26 9:59 ` Ming Lei
2022-01-26 16:37 ` Christoph Hellwig
2022-01-22 11:10 ` [PATCH V2 06/13] block: don't remove hctx debugfs dir from blk_mq_exit_queue Ming Lei
2022-01-24 13:06 ` Christoph Hellwig
2022-01-22 11:10 ` [PATCH V2 07/13] block: move q_usage_counter release into blk_queue_release Ming Lei
2022-01-24 13:09 ` Christoph Hellwig
2022-01-24 19:06 ` Bart Van Assche
2022-01-22 11:10 ` [PATCH V2 08/13] block: export __blk_mq_unfreeze_queue Ming Lei
2022-01-24 13:11 ` Christoph Hellwig
2022-01-22 11:10 ` [PATCH V2 09/13] scsi: force unfreezing queue into atomic mode Ming Lei
2022-01-24 13:15 ` Christoph Hellwig [this message]
2022-01-24 23:21 ` Ming Lei
2022-01-25 7:27 ` Christoph Hellwig
2022-01-25 8:54 ` Ming Lei
2022-01-26 8:15 ` Christoph Hellwig
2022-01-22 11:10 ` [PATCH V2 10/13] block: add helper of disk_release_queue for release queue data for disk Ming Lei
2022-01-24 13:16 ` Christoph Hellwig
2022-01-24 23:27 ` Ming Lei
2022-01-25 6:17 ` Christoph Hellwig
2022-01-22 11:10 ` [PATCH V2 11/13] block: move blk_exit_queue into disk_release Ming Lei
2022-01-24 13:22 ` Christoph Hellwig
2022-01-24 23:38 ` Ming Lei
2022-01-22 11:10 ` [PATCH V2 12/13] block: move rq_qos_exit() into disk_release() Ming Lei
2022-01-24 13:28 ` Christoph Hellwig
2022-01-22 11:10 ` [PATCH V2 13/13] block: don't drain file system I/O on del_gendisk Ming Lei
2022-01-24 13:39 ` Christoph Hellwig
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