From: Dave Chinner <[email protected]>
To: Hao Xu <[email protected]>
Cc: [email protected], Jens Axboe <[email protected]>,
Dominique Martinet <[email protected]>,
Pavel Begunkov <[email protected]>,
Christian Brauner <[email protected]>,
Alexander Viro <[email protected]>,
Stefan Roesch <[email protected]>, Clay Harris <[email protected]>,
"Darrick J . Wong" <[email protected]>,
[email protected], [email protected],
[email protected], Wanpeng Li <[email protected]>
Subject: Re: [PATCH 1/7] iomap: merge iomap_seek_hole() and iomap_seek_data()
Date: Thu, 27 Jul 2023 07:50:43 +1000 [thread overview]
Message-ID: <ZMGVM/[email protected]> (raw)
In-Reply-To: <[email protected]>
On Wed, Jul 26, 2023 at 06:25:57PM +0800, Hao Xu wrote:
> From: Hao Xu <[email protected]>
>
> The two functions share almost same code, merge them together.
> No functional change in this patch.
No, please don't. seek data and seek hole have subtly different
semantics and return values, and we've explicitly kept them separate
because it's much easier to maintain them as separate functions with
separate semantics than combine them into a single function with
lots of non-obvious conditional behaviour.
The fact that the new iomap_seek() API requires a boolean "SEEK_DATA
or SEEK_HOLE" field to indicate that the caller wants makes it clear
that this isn't actually an improvement over explicit
iomap_seek_data() and iomap_seek_hole() API calls.
-Dave.
--
Dave Chinner
[email protected]
next prev parent reply other threads:[~2023-07-26 21:50 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-07-26 10:25 [RFC 0/7] io_uring lseek Hao Xu
2023-07-26 10:25 ` [PATCH 1/7] iomap: merge iomap_seek_hole() and iomap_seek_data() Hao Xu
2023-07-26 21:50 ` Dave Chinner [this message]
2023-07-27 12:10 ` Hao Xu
2023-07-26 10:25 ` [PATCH 2/7] xfs: add nowait support for xfs_seek_iomap_begin() Hao Xu
2023-07-26 21:55 ` Dave Chinner
2023-07-26 22:14 ` Darrick J. Wong
2023-07-27 12:17 ` Hao Xu
2023-07-26 10:25 ` [PATCH 3/7] add nowait parameter for iomap_seek() Hao Xu
2023-07-26 22:01 ` Dave Chinner
2023-07-26 10:26 ` [PATCH 4/7] add llseek_nowait() for struct file_operations Hao Xu
2023-07-27 13:25 ` Matthew Wilcox
2023-07-26 10:26 ` [PATCH 5/7] add llseek_nowait support for xfs Hao Xu
2023-07-26 22:14 ` Dave Chinner
2023-07-27 12:26 ` Hao Xu
2023-07-26 10:26 ` [PATCH 6/7] add vfs_lseek_nowait() Hao Xu
2023-07-26 10:26 ` [PATCH 7/7] add lseek for io_uring Hao Xu
2023-07-26 13:22 ` [RFC 0/7] io_uring lseek Christian Brauner
2023-07-27 12:30 ` Hao Xu
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