- Subject: Re: Extended file stat: Splitting file- and fs-specific info?
- From: Andreas Dilger <adilger@xxxxxxxxx>
- Date: Thu, 10 May 2012 10:05:28 -0600
- Cc: Andreas Dilger <aedilger@xxxxxxxxx>, Dave Chinner <david@xxxxxxxxxxxxx>, "bfields@xxxxxxxxxxxx" <bfields@xxxxxxxxxxxx>, "smfrench@xxxxxxxxx" <smfrench@xxxxxxxxx>, "ben@xxxxxxxxxxxxxxx" <ben@xxxxxxxxxxxxxxx>, "Trond.Myklebust@xxxxxxxxxx" <Trond.Myklebust@xxxxxxxxxx>, "roland@xxxxxxxxxxxxx" <roland@xxxxxxxxxxxxx>, "linux-fsdevel@xxxxxxxxxxxxxxx" <linux-fsdevel@xxxxxxxxxxxxxxx>, "linux-nfs@xxxxxxxxxxxxxxx" <linux-nfs@xxxxxxxxxxxxxxx>, "linux-cifs@xxxxxxxxxxxxxxx" <linux-cifs@xxxxxxxxxxxxxxx>, "samba-technical@xxxxxxxxxxxxxxx" <samba-technical@xxxxxxxxxxxxxxx>, "linux-ext4@xxxxxxxxxxxxxxx" <linux-ext4@xxxxxxxxxxxxxxx>, "linux-api@xxxxxxxxxxxxxxx" <linux-api@xxxxxxxxxxxxxxx>, "libc-alpha@xxxxxxxxxxxxxx" <libc-alpha@xxxxxxxxxxxxxx>
- In-reply-to: <14477.1336641794@redhat.com>
- References: <73759631-F1E4-4352-9FE6-E9F576F793FB@gmail.com> <20120419140558.17272.74360.stgit@warthog.procyon.org.uk> <16281.1336508382@redhat.com> <20120509002420.GL5091@dastard> <14477.1336641794@redhat.com>
On 2012-05-10, at 3:23 AM, David Howells wrote:
> Andreas Dilger <aedilger@xxxxxxxxx> wrote:
>> The main question I have about these fields is what the difference is
>> between st_blksize and st_alloc_blksize?
>
> I would assume that st_blksize is some ideal I/O size, not the
> allocation block size.
But there are several optimal IO sizes, so unless there is a clear
description of what each of these fields is intended to be used for,
it doesn't make sense to add them in.
> Dave Chinner might be able to answer better as he suggested these
> I/O information fields.
>
> David
Cheers, Andreas
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