linux-kernel - Re: [Q] missing unused dentry in prune

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Date:	Fri, 27 Oct 2006 13:11:21 +0100
From:	David Howells <dhowells@...hat.com>
To:	Vasily Averin <vvs@...ru>
Cc:	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: [Q] missing unused dentry in prune_dcache()? 

Vasily Averin <vvs@...ru> wrote:

> > Vasily Averin <vvs@...ru> wrote:
> >> Therefore I believe that my patch is optimal solution.
> > I'm not sure that prune_dcache() is particularly optimal.
> 
> I means that my patch is optimal for problem in subject.

I didn't say it wasn't.

> I would like to ask you to approve it and we will go to next issue.

I did ack it didn't I?  I must fix my mail client so that it doesn't
automatically remove my email address from the To/Cc fields when I'm replying
to a message:-/

> We have seen that umount (and remount) can work very slowly, it was cycled
> inside shrink_dcache_sb() up to several hours with taken s_umount semaphore.

umount at least should be fixed as that should no longer use
shrink_dcache_sb().

> We are trying to resolve this issue by using per-sb lru list. I'm preparing
> the patch for 2.6.19-rc3 right now and going to send it soon.

That sounds tricky; you have to check all your LRU lists to find the LRU
dentry.

David
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