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Message-ID: <CAH2r5ms2b=5zOFA0+E+Nf9oot+5Q3Ye42ET62_P6hnrD8HTt7w@mail.gmail.com>
Date: Fri, 27 Apr 2012 19:54:12 -0500
From: Steve French <smfrench@...il.com>
To: Dave Chinner <david@...morbit.com>
Cc: Andreas Dilger <adilger@...mcloud.com>,
David Howells <dhowells@...hat.com>,
linux-fsdevel@...r.kernel.org, linux-nfs@...r.kernel.org,
linux-cifs@...r.kernel.org, samba-technical@...ts.samba.org,
linux-ext4@...r.kernel.org, wine-devel@...ehq.org,
linux-api@...r.kernel.org, libc-alpha@...rceware.org
Subject: Re: [PATCH 0/6] Extended file stat system call
On Fri, Apr 27, 2012 at 7:38 PM, Dave Chinner <david@...morbit.com> wrote:
> preferred minimum IO size (mp->m_readio_log/mp->m_writeio_log)
This discussion about i/o sizes is very interesting. For network
file system (at least for SMB2 to all known servers, and
for cifs mounts to Samba, but probably for recent NFS), ideal i/o
sizes are often well over a megabyte ... but how to indicate that to
the application...
> That's why I'd prefer specific optimal IO hints - we don't have to
> overload st_blksize with lots of meanings to pass what is relatively
> trivial information back to the application.
>
> Cheers,
>
> Dave.
> --
> Dave Chinner
Yes.
--
Thanks,
Steve
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