From: Matthew Wilcox <willy@infradead.org>
To: Steve French <smfrench@gmail.com>
Cc: CIFS <linux-cifs@vger.kernel.org>,
Jeff Layton <jlayton@redhat.com>,
David Howells <dhowells@redhat.com>
Subject: Re: [PATCH] smb3: add rasize mount parameter to improve performance of readahead
Date: Sun, 25 Apr 2021 03:09:46 +0100 [thread overview]
Message-ID: <20210425020946.GG235567@casper.infradead.org> (raw)
In-Reply-To: <CAH2r5mvfMfgGimkmC9nQxvOMt=2E7S1=dA33MJaszy5NHE2zxQ@mail.gmail.com>
On Sat, Apr 24, 2021 at 02:27:11PM -0500, Steve French wrote:
> Using the buildbot test systems, this resulted in an average improvement
> of 14% to the Windows server test target for the first 12 tests I
> tried (no multichannel)
> changing to 12MB rasize (read ahead size). Similarly increasing the
> rasize to 12MB to Azure (this time with multichannel, 4 channels)
> improved performance 37%
>
> Note that Ceph had already introduced a mount parameter "rasize" to
> allow controlling this. Add mount parameter "rasize" to cifs.ko to
> allow control of read ahead (rasize defaults to 4MB which is typically
> what it used to default to to the many servers whose rsize was that).
I think something was missing from this patch -- I see you parse it and
set it in the mount context, but I don't see where it then gets used to
actually affect readahead.
next prev parent reply other threads:[~2021-04-25 2:10 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-24 19:27 [PATCH] smb3: add rasize mount parameter to improve performance of readahead Steve French
2021-04-24 20:08 ` Steve French
2021-04-25 2:09 ` Matthew Wilcox [this message]
2021-04-25 2:36 ` Steve French
2021-04-25 16:50 ` Steve French
2021-04-26 4:52 ` Shyam Prasad N
2021-04-26 11:54 ` Matthew Wilcox
2021-04-27 2:23 ` Steve French
2021-04-30 10:49 ` Shyam Prasad N
2021-04-30 11:59 ` Matthew Wilcox
2021-04-30 12:53 ` Shyam Prasad N
2021-04-30 19:22 ` Steve French
2021-05-01 18:35 ` Matthew Wilcox
2021-05-01 18:47 ` Steve French
2021-05-01 18:50 ` Steve French
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210425020946.GG235567@casper.infradead.org \
--to=willy@infradead.org \
--cc=dhowells@redhat.com \
--cc=jlayton@redhat.com \
--cc=linux-cifs@vger.kernel.org \
--cc=smfrench@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).