From: "Martin K. Petersen" <martin.petersen@oracle.com>
To: Pavel Begunkov <asml.silence@gmail.com>
Cc: "Martin K . Petersen" <martin.petersen@oracle.com>,
linux-scsi@vger.kernel.org, target-devel@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] target/file: don't zero iter before iov_iter_bvec
Date: Wed, 13 Jan 2021 00:34:03 -0500 [thread overview]
Message-ID: <yq11rep2yey.fsf@ca-mkp.ca.oracle.com> (raw)
In-Reply-To: <34cd22d6cec046e3adf402accb1453cc255b9042.1610207523.git.asml.silence@gmail.com> (Pavel Begunkov's message of "Sat, 9 Jan 2021 15:53:27 +0000")
Pavel,
> iov_iter_bvec() initialises iterators well, no need to pre-zero it
> beforehand as done in fd_execute_rw_aio(). Compilers can't optimise it
> out and generate extra code for that (confirmed with assembly).
Applied to 5.12/scsi-staging, thanks!
--
Martin K. Petersen Oracle Linux Engineering
next prev parent reply other threads:[~2021-01-13 5:35 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-09 15:53 [PATCH] target/file: don't zero iter before iov_iter_bvec Pavel Begunkov
2021-01-09 20:09 ` Chaitanya Kulkarni
2021-01-09 20:37 ` Pavel Begunkov
2021-01-09 20:52 ` Chaitanya Kulkarni
2021-01-09 21:25 ` Pavel Begunkov
2021-01-11 2:06 ` Chaitanya Kulkarni
2021-01-11 2:28 ` Pavel Begunkov
2021-01-11 5:23 ` Chaitanya Kulkarni
2021-01-11 5:31 ` Pavel Begunkov
2021-01-11 2:49 ` Bart Van Assche
2021-01-13 5:34 ` Martin K. Petersen [this message]
2021-01-15 4:08 ` Martin K. Petersen
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