From: Jens Axboe <axboe@kernel.dk>
To: Pavel Begunkov <asml.silence@gmail.com>, io-uring@vger.kernel.org
Subject: Re: [PATCH] io_uring: flip if handling after io_setup_async_rw
Date: Sat, 1 Aug 2020 11:03:37 -0600 [thread overview]
Message-ID: <90fc3c0d-054f-4abf-ad5d-623609335a34@kernel.dk> (raw)
In-Reply-To: <b5a869f3f739854a0458cc32be9af96e79b62dbc.1596275586.git.asml.silence@gmail.com>
On 8/1/20 4:50 AM, Pavel Begunkov wrote:
> As recently done with with send/recv, flip the if after
> rw_verify_aread() in io_{read,write}() and tabulise left bits left.
> This removes mispredicted by a compiler jump on the success/fast path.
Applied, thanks.
--
Jens Axboe
prev parent reply other threads:[~2020-08-01 17:03 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-01 10:50 [PATCH] io_uring: flip if handling after io_setup_async_rw Pavel Begunkov
2020-08-01 17:03 ` Jens Axboe [this message]
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