linux-kernel - Re: [PATCH] fuse: enable larger read buffers for readdir.

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Message-ID: <CAJfpegtaxHu2RCqStSFyGzEUrQx-cpuQaCCxiB-F6YmBEvNiJw@mail.gmail.com>
Date:   Thu, 27 Jul 2023 21:21:18 +0200
From:   Miklos Szeredi <miklos@...redi.hu>
To:     Jaco Kroon <jaco@....co.za>
Cc:     Antonio SJ Musumeci <trapexit@...wn.link>,
        Bernd Schubert <bernd.schubert@...tmail.fm>,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] fuse: enable larger read buffers for readdir.

On Wed, 26 Jul 2023 at 20:40, Jaco Kroon <jaco@....co.za> wrote:

> Will look into FUSE_INIT.  The FUSE_INIT as I understand from what I've
> read has some expansion constraints or the structure is somehow
> negotiated.  Older clients in other words that's not aware of the option
> will follow some default.  For backwards compatibility that default
> should probably be 1 page.  For performance reasons it makes sense that
> this limit be larger.

Yes, might need this for backward compatibility.  But perhaps a
feature flag is enough and the readdir buf can be limited to
fc->max_read.

Thanks,
Miklos