From: Christoph Hellwig <hch@lst.de>
To: Jens Axboe <axboe@kernel.dk>
Cc: Jeff Moyer <jmoyer@redhat.com>,
linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org,
linux-aio@kvack.org, hch@lst.de
Subject: Re: [PATCH 03/26] block: wire up block device iopoll method
Date: Thu, 6 Dec 2018 20:15:27 +0100 [thread overview]
Message-ID: <20181206191527.GA30806@lst.de> (raw)
In-Reply-To: <72b6acc7-5017-a72c-3fb0-90e5ad95ebb7@kernel.dk>
On Thu, Dec 06, 2018 at 12:14:29PM -0700, Jens Axboe wrote:
> On 12/6/18 12:11 PM, Jeff Moyer wrote:
> > Jens Axboe <axboe@kernel.dk> writes:
> >
> >> From: Christoph Hellwig <hch@lst.de>
> >>
> >> Just call blk_poll on the iocb cookie, we can derive the block device
> >> from the inode trivially.
> >
> > Does this work for multi-device file systems?
>
> It should, that's the whole purpose of having fops->iopoll. You should
> be able to derive it from inode + cookie.
It still assumes the whole I/O will got to a single device. For
XFS this is always tree, but for btrfs this might mean I/O could
need splitting if ->iopoll was to be supported there.
next prev parent reply other threads:[~2018-12-06 19:15 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-04 23:37 [PATCHSET v5] Support for polled aio Jens Axboe
2018-12-04 23:37 ` [PATCH 01/26] fs: add an iopoll method to struct file_operations Jens Axboe
2018-12-06 19:16 ` Jeff Moyer
2018-12-04 23:37 ` [PATCH 02/26] block: add REQ_HIPRI_ASYNC Jens Axboe
2018-12-04 23:37 ` [PATCH 03/26] block: wire up block device iopoll method Jens Axboe
2018-12-06 19:11 ` Jeff Moyer
2018-12-06 19:14 ` Jens Axboe
2018-12-06 19:15 ` Christoph Hellwig [this message]
2018-12-06 19:25 ` Jens Axboe
2018-12-04 23:37 ` [PATCH 04/26] block: use REQ_HIPRI_ASYNC for non-sync polled IO Jens Axboe
2018-12-04 23:37 ` [PATCH 05/26] iomap: wire up the iopoll method Jens Axboe
2018-12-04 23:37 ` [PATCH 06/26] aio: use assigned completion handler Jens Axboe
2018-12-04 23:37 ` [PATCH 07/26] aio: separate out ring reservation from req allocation Jens Axboe
2018-12-04 23:37 ` [PATCH 08/26] aio: don't zero entire aio_kiocb aio_get_req() Jens Axboe
2018-12-06 19:27 ` Jeff Moyer
2018-12-06 19:28 ` Jens Axboe
2018-12-06 19:38 ` Jeff Moyer
2018-12-06 19:42 ` Jens Axboe
2018-12-04 23:37 ` [PATCH 09/26] aio: only use blk plugs for > 2 depth submissions Jens Axboe
2018-12-06 19:29 ` Jeff Moyer
2018-12-06 19:31 ` Jens Axboe
2018-12-04 23:37 ` [PATCH 10/26] aio: use iocb_put() instead of open coding it Jens Axboe
2018-12-04 23:37 ` [PATCH 11/26] aio: split out iocb copy from io_submit_one() Jens Axboe
2018-12-04 23:37 ` [PATCH 12/26] aio: abstract out io_event filler helper Jens Axboe
2018-12-04 23:37 ` [PATCH 13/26] aio: add io_setup2() system call Jens Axboe
2018-12-04 23:37 ` [PATCH 14/26] aio: add support for having user mapped iocbs Jens Axboe
2018-12-04 23:37 ` [PATCH 15/26] aio: support for IO polling Jens Axboe
2018-12-05 9:56 ` Benny Halevy
2018-12-05 13:10 ` Jens Axboe
2018-12-06 9:04 ` Benny Halevy
2018-12-04 23:37 ` [PATCH 16/26] aio: add submission side request cache Jens Axboe
2018-12-04 23:37 ` [PATCH 17/26] fs: add fget_many() and fput_many() Jens Axboe
2018-12-04 23:37 ` [PATCH 18/26] aio: use fget/fput_many() for file references Jens Axboe
2018-12-04 23:37 ` [PATCH 19/26] aio: split iocb init from allocation Jens Axboe
2018-12-04 23:37 ` [PATCH 20/26] aio: batch aio_kiocb allocation Jens Axboe
2018-12-04 23:37 ` [PATCH 21/26] block: add BIO_HOLD_PAGES flag Jens Axboe
2018-12-04 23:37 ` [PATCH 22/26] block: implement bio helper to add iter bvec pages to bio Jens Axboe
2018-12-04 23:37 ` [PATCH 23/26] fs: add support for mapping an ITER_BVEC for O_DIRECT Jens Axboe
2018-12-04 23:37 ` [PATCH 24/26] aio: add support for pre-mapped user IO buffers Jens Axboe
2018-12-04 23:37 ` [PATCH 25/26] aio: split old ring complete out from aio_complete() Jens Axboe
2018-12-04 23:37 ` [PATCH 26/26] aio: add support for submission/completion rings Jens Axboe
2018-12-07 18:48 ` [PATCHSET v5] Support for polled aio Jeff Moyer
2018-12-07 18:52 ` Jens Axboe
2018-12-07 18:55 ` Jens Axboe
2018-12-07 19:34 ` Jeff Moyer
2018-12-07 19:35 ` Jens Axboe
2018-12-07 21:58 ` Jens Axboe
2018-12-07 21:59 ` Jens Axboe
2018-12-07 22:00 ` Jens Axboe
2018-12-07 22:06 ` Jens Axboe
-- strict thread matches above, loose matches on Subject: below --
2018-12-07 22:19 [PATCHSET v6] Support for polled aio (and more) Jens Axboe
2018-12-07 22:19 ` [PATCH 03/26] block: wire up block device iopoll method Jens Axboe
2018-12-13 17:56 [PATCHSET v8] Support for polled and buffered aio (and more) Jens Axboe
2018-12-13 17:56 ` [PATCH 03/26] block: wire up block device iopoll method Jens Axboe
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