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Re: [PATCH 3/4] simplify xfs_vn_getattr

To: Lachlan McIlroy <lachlan@xxxxxxx>
Subject: Re: [PATCH 3/4] simplify xfs_vn_getattr
From: Christoph Hellwig <hch@xxxxxx>
Date: Wed, 19 Sep 2007 13:04:38 +0200
Cc: Christoph Hellwig <hch@xxxxxx>, xfs@xxxxxxxxxxx
In-reply-to: <46F08F98.9070102@xxxxxxx>
References: <20070914162757.GD7110@xxxxxx> <46F08F98.9070102@xxxxxxx>
Sender: xfs-bounce@xxxxxxxxxxx
User-agent: Mutt/1.3.28i
On Wed, Sep 19, 2007 at 12:55:20PM +1000, Lachlan McIlroy wrote:
> Why do we copy the atime from the inode and not the xfs_inode?
> 
> I think I see what's the deal here - the atime in the inode is
> the authoritative atime.  It gets updated from various places and
> we synchronise it to the xfs inode before flushing the xfs inode
> to disk.  This means we shouldn't be using the atime in the
> xfs_inode because it will be stale - is this correct?

Yes.   atime is updated by the vfs without callouts to the filesystem
in various places unfortunately.


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