From: Ming Lei <ming.lei@redhat.com>
To: Christoph Hellwig <hch@lst.de>
Cc: 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
Subject: Re: [PATCH V2 05/13] block: only account passthrough IO from userspace
Date: Wed, 26 Jan 2022 15:21:04 +0800 [thread overview]
Message-ID: <YfD2YNRf+lhe5BcU@T590> (raw)
In-Reply-To: <20220126055003.GA21089@lst.de>
On Wed, Jan 26, 2022 at 06:50:03AM +0100, Christoph Hellwig wrote:
> On Tue, Jan 25, 2022 at 05:09:42PM +0800, Ming Lei wrote:
> > Follows another simple way by accounting all request with bio attached,
> > except for requests with kernel buffer.
>
> > - else if (rq->q->disk)
> > + else if (rq->q->disk && rq->bio)
> > rq->part = rq->q->disk->part0;
>
> Most passthrough requests will have a bio, so you'll still use e.g.
> the sd gendisk for sg request here.
>
> I think the right way would be to just remove this branch entirely.
> This means we only account bios with a block_device, which implies
> they have a gendisk.
That will not account userspace IO, and people may complain.
We can just account passthrough request from userspace by the patch
in my last email.
Thanks,
Ming
next prev parent reply other threads:[~2022-01-26 7:21 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 [this message]
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
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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