From: Jens Axboe <[email protected]>
To: Pavel Begunkov <[email protected]>,
Arnd Bergmann <[email protected]>,
Greg Kroah-Hartman <[email protected]>,
[email protected]
Cc: [email protected]
Subject: Re: [PATCH v2] /dev/mem: nowait zero/null ops
Date: Wed, 8 Sep 2021 13:15:27 -0600 [thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <f11090f97ddc2b2ce49ea1211258658ddfbc5563.1631127867.git.asml.silence@gmail.com>
On 9/8/21 1:10 PM, Pavel Begunkov wrote:
> Make read_iter_zero() to honor IOCB_NOWAIT, so /dev/zero can be
> advertised as FMODE_NOWAIT. It's useful for io_uring, which needs it to
> apply certain optimisations when doing I/O against the device.
>
> Set FMODE_NOWAIT for /dev/null as well, it never waits and therefore
> trivially meets the criteria.
Reviewed-by: Jens Axboe <[email protected]>
--
Jens Axboe
prev parent reply other threads:[~2021-09-08 19:15 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-08 19:10 [PATCH v2] /dev/mem: nowait zero/null ops Pavel Begunkov
2021-09-08 19:15 ` Jens Axboe [this message]
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