linux-kernel - Re: [PATCH 2.6.19-rc3] VFS: per-sb dentry lru list

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Message-ID: <20061030042419.GW8394166@melbourne.sgi.com>
Date:	Mon, 30 Oct 2006 15:24:19 +1100
From:	David Chinner <dgc@....com>
To:	Vasily Averin <vvs@...ru>
Cc:	David Howells <dhowells@...hat.com>, Neil Brown <neilb@...e.de>,
	Jan Blunck <jblunck@...e.de>, Olaf Hering <olh@...e.de>,
	Balbir Singh <balbir@...ibm.com>,
	Kirill Korotaev <dev@...nvz.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	devel@...nvz.org, Andrew Morton <akpm@...l.org>
Subject: Re: [PATCH 2.6.19-rc3] VFS: per-sb dentry lru list

On Fri, Oct 27, 2006 at 06:05:50PM +0400, Vasily Averin wrote:
> 
> The proposed fix prevents this issue by using per-sb dentry LRU list. It
> provides very quickly search for the unused dentries for given super block thus
> forcing shrinking always making good progress.

We've been down this path before:

http://marc.theaimsgroup.com/?l=linux-kernel&m=114861109717260&w=2

A lot of comments on per-sb unused dentry lists were made in
the threads associated with the above. other solutions were
found to the problem that the above patch addressed, but I don't
think any of them have made it to mainline yet. You might want
to have a bit of a read of these threads first...

Cheers,

Dave.
-- 
Dave Chinner
Principal Engineer
SGI Australian Software Group
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