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Re: 2.6.24-rc2 XFS nfsd hang

To: "J. Bruce Fields" <bfields@xxxxxxxxxxxx>
Subject: Re: 2.6.24-rc2 XFS nfsd hang
From: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Date: Wed, 21 Nov 2007 15:07:46 +0000
Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx>, Chris Wedgwood <cw@xxxxxxxx>, linux-xfs@xxxxxxxxxxx, LKML <linux-kernel@xxxxxxxxxxxxxxx>
In-reply-to: <20071114180838.GE14254@fieldses.org>
References: <20071114070400.GA25708@puku.stupidest.org> <20071114152952.GA4210@infradead.org> <20071114173922.GC14254@fieldses.org> <20071114174419.GA15271@infradead.org> <20071114175322.GD14254@fieldses.org> <20071114180241.GA16656@infradead.org> <20071114180838.GE14254@fieldses.org>
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On Wed, Nov 14, 2007 at 01:08:38PM -0500, J. Bruce Fields wrote:
> > Personally I'd prefer it to only grow a struct stat or rather it's members
> > But the nfsd code currently expects a dentry so this might require some
> > major refactoring.
> 
> Well, we need to check for mountpoints, for example, so I don't see any
> way out of needing a dentry.  What's the drawback?

You're right - we'd probably need the dentry.  The drawback is that
we need to always get it in the dcache.  Which might be a good thing
depending on the workload.


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