From: Christoph Hellwig <[email protected]>
To: Pavel Begunkov <[email protected]>
Cc: [email protected], Jens Axboe <[email protected]>,
Christoph Hellwig <[email protected]>,
Matthew Wilcox <[email protected]>,
Ming Lei <[email protected]>,
Johannes Weiner <[email protected]>,
Alexander Viro <[email protected]>,
"Darrick J . Wong" <[email protected]>,
"Martin K . Petersen" <[email protected]>,
Jonathan Corbet <[email protected]>,
[email protected], [email protected],
[email protected], [email protected],
[email protected], [email protected],
[email protected]
Subject: Re: [PATCH v2 2/7] bvec/iter: disallow zero-length segment bvecs
Date: Mon, 4 Jan 2021 16:18:27 +0000 [thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <b46b8c1943bbefcb90ea5c4dd9beaad8bbc15448.1609461359.git.asml.silence@gmail.com>
On Sat, Jan 02, 2021 at 03:17:34PM +0000, Pavel Begunkov wrote:
> zero-length bvec segments are allowed in general, but not handled by bio
> and down the block layer so filtered out. This inconsistency may be
> confusing and prevent from optimisations. As zero-length segments are
> useless and places that were generating them are patched, declare them
> not allowed.
Looks good,
Reviewed-by: Christoph Hellwig <[email protected]>
next prev parent reply other threads:[~2021-01-04 16:20 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-02 15:17 [PATCH v2 0/7] no-copy bvec Pavel Begunkov
2021-01-02 15:17 ` [PATCH v2 1/7] splice: don't generate zero-len segement bvecs Pavel Begunkov
2021-01-04 16:17 ` Christoph Hellwig
2021-01-04 16:54 ` Pavel Begunkov
2021-01-02 15:17 ` [PATCH v2 2/7] bvec/iter: disallow zero-length segment bvecs Pavel Begunkov
2021-01-04 16:18 ` Christoph Hellwig [this message]
2021-01-04 16:37 ` Matthew Wilcox
2021-01-04 17:23 ` Pavel Begunkov
2021-01-02 15:17 ` [PATCH v2 3/7] block/psi: remove PSI annotations from direct IO Pavel Begunkov
2021-01-04 16:45 ` Christoph Hellwig
2021-01-02 15:17 ` [PATCH v2 4/7] target/file: allocate the bvec array as part of struct target_core_file_cmd Pavel Begunkov
2021-01-02 15:17 ` [PATCH v2 5/7] iov_iter: optimise bvec iov_iter_advance() Pavel Begunkov
2021-01-02 15:17 ` [PATCH v2 6/7] bio: add a helper calculating nr segments to alloc Pavel Begunkov
2021-01-02 15:17 ` [PATCH v2 7/7] bio: don't copy bvec for direct IO Pavel Begunkov
2021-01-04 16:20 ` Christoph Hellwig
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