From: "Darrick J. Wong" <djwong@kernel.org>
To: Jens Axboe <axboe@kernel.dk>
Cc: io-uring@vger.kernel.org, linux-xfs@vger.kernel.org, hch@lst.de,
andres@anarazel.de, david@fromorbit.com
Subject: Re: [PATCH 2/8] iomap: add IOMAP_DIO_INLINE_COMP
Date: Fri, 21 Jul 2023 08:16:04 -0700 [thread overview]
Message-ID: <20230721151604.GL11352@frogsfrogsfrogs> (raw)
In-Reply-To: <20230720181310.71589-3-axboe@kernel.dk>
On Thu, Jul 20, 2023 at 12:13:04PM -0600, Jens Axboe wrote:
> Rather than gate whether or not we need to punt a dio completion to a
> workqueue on whether the IO is a write or not, add an explicit flag for
> it. For now we treat them the same, reads always set the flags and async
> writes do not.
>
> No functional changes in this patch.
>
> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Looks good,
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
--D
> ---
> fs/iomap/direct-io.c | 10 ++++++++--
> 1 file changed, 8 insertions(+), 2 deletions(-)
>
> diff --git a/fs/iomap/direct-io.c b/fs/iomap/direct-io.c
> index 0ce60e80c901..c654612b24e5 100644
> --- a/fs/iomap/direct-io.c
> +++ b/fs/iomap/direct-io.c
> @@ -20,6 +20,7 @@
> * Private flags for iomap_dio, must not overlap with the public ones in
> * iomap.h:
> */
> +#define IOMAP_DIO_INLINE_COMP (1 << 27)
> #define IOMAP_DIO_WRITE_FUA (1 << 28)
> #define IOMAP_DIO_NEED_SYNC (1 << 29)
> #define IOMAP_DIO_WRITE (1 << 30)
> @@ -171,8 +172,10 @@ void iomap_dio_bio_end_io(struct bio *bio)
> goto release_bio;
> }
>
> - /* Read completion can always complete inline. */
> - if (!(dio->flags & IOMAP_DIO_WRITE)) {
> + /*
> + * Flagged with IOMAP_DIO_INLINE_COMP, we can complete it inline
> + */
> + if (dio->flags & IOMAP_DIO_INLINE_COMP) {
> WRITE_ONCE(iocb->private, NULL);
> iomap_dio_complete_work(&dio->aio.work);
> goto release_bio;
> @@ -527,6 +530,9 @@ __iomap_dio_rw(struct kiocb *iocb, struct iov_iter *iter,
> iomi.flags |= IOMAP_NOWAIT;
>
> if (iov_iter_rw(iter) == READ) {
> + /* reads can always complete inline */
> + dio->flags |= IOMAP_DIO_INLINE_COMP;
> +
> if (iomi.pos >= dio->i_size)
> goto out_free_dio;
>
> --
> 2.40.1
>
next prev parent reply other threads:[~2023-07-21 15:16 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-07-20 18:13 [PATCHSET v4 0/8] Improve async iomap DIO performance Jens Axboe
2023-07-20 18:13 ` [PATCH 1/8] iomap: cleanup up iomap_dio_bio_end_io() Jens Axboe
2023-07-21 6:14 ` Christoph Hellwig
2023-07-21 15:13 ` Darrick J. Wong
2023-07-20 18:13 ` [PATCH 2/8] iomap: add IOMAP_DIO_INLINE_COMP Jens Axboe
2023-07-21 6:14 ` Christoph Hellwig
2023-07-21 15:16 ` Darrick J. Wong [this message]
2023-07-20 18:13 ` [PATCH 3/8] iomap: treat a write through cache the same as FUA Jens Axboe
2023-07-21 6:15 ` Christoph Hellwig
2023-07-21 14:04 ` Jens Axboe
2023-07-21 15:55 ` Darrick J. Wong
2023-07-21 16:03 ` Jens Axboe
2023-07-20 18:13 ` [PATCH 4/8] iomap: completed polled IO inline Jens Axboe
2023-07-21 6:16 ` Christoph Hellwig
2023-07-21 15:19 ` Darrick J. Wong
2023-07-21 21:43 ` Dave Chinner
2023-07-22 3:10 ` Jens Axboe
2023-07-22 23:05 ` Dave Chinner
2023-07-24 22:35 ` Jens Axboe
2023-07-22 16:54 ` Jens Axboe
2023-07-20 18:13 ` [PATCH 5/8] iomap: only set iocb->private for polled bio Jens Axboe
2023-07-21 6:18 ` Christoph Hellwig
2023-07-21 15:35 ` Darrick J. Wong
2023-07-21 15:37 ` Jens Axboe
2023-07-20 18:13 ` [PATCH 6/8] fs: add IOCB flags related to passing back dio completions Jens Axboe
2023-07-21 6:18 ` Christoph Hellwig
2023-07-21 15:48 ` Darrick J. Wong
2023-07-21 15:53 ` Jens Axboe
2023-07-20 18:13 ` [PATCH 7/8] io_uring/rw: add write support for IOCB_DIO_DEFER Jens Axboe
2023-07-21 6:19 ` Christoph Hellwig
2023-07-21 15:50 ` Darrick J. Wong
2023-07-21 15:53 ` Jens Axboe
2023-07-20 18:13 ` [PATCH 8/8] iomap: support IOCB_DIO_DEFER Jens Axboe
2023-07-21 6:19 ` Christoph Hellwig
2023-07-21 16:01 ` Darrick J. Wong
2023-07-21 16:30 ` Jens Axboe
2023-07-21 22:05 ` Dave Chinner
2023-07-22 3:12 ` Jens Axboe
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