linux-kernel - Re: [PATCH v4 0/3] random: convert to using iters, for Al Viro

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Message-ID: <Yoey+FOYO69lS5qP@zx2c4.com>
Date:   Fri, 20 May 2022 17:25:44 +0200
From:   "Jason A. Donenfeld" <Jason@...c4.com>
To:     Jens Axboe <axboe@...nel.dk>, Theodore Ts'o <tytso@....edu>,
        Christoph Hellwig <hch@....de>,
        LKML <linux-kernel@...r.kernel.org>,
        Al Viro <viro@...iv.linux.org.uk>
Subject: Re: [PATCH v4 0/3] random: convert to using iters, for Al Viro

Hi Jens,

On Fri, May 20, 2022 at 11:44:56AM +0200, Jason A. Donenfeld wrote:
> Jens Axboe (3):
>   random: convert to using fops->read_iter()
>   random: convert to using fops->write_iter()
>   random: wire up fops->splice_{read,write}_iter()

FYI, this series makes reads from /dev/urandom slower, from around 616
MiB/s to 598 MiB/s on my system. That seems rather unfortunate.

Are we sure we really want to do this and need to do this?

Jason