linux-ext4 - Re: [PATCH 0/6] Extended file stat system call

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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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