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Date:	Fri, 27 Apr 2012 19:54:12 -0500
From:	Steve French <>
To:	Dave Chinner <>
Cc:	Andreas Dilger <>,
	David Howells <>,,,,,,,,
Subject: Re: [PATCH 0/6] Extended file stat system call

On Fri, Apr 27, 2012 at 7:38 PM, Dave Chinner <> 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



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