netdev - Re: [patch 18/21] Filesystem: Socket inode defragmentation

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Message-ID: <Pine.LNX.4.64.0805151039060.18708@schroedinger.engr.sgi.com>
Date:	Thu, 15 May 2008 10:40:11 -0700 (PDT)
From:	Christoph Lameter <clameter@....com>
To:	Evgeniy Polyakov <johnpol@....mipt.ru>
cc:	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	Mel Gorman <mel@...net.ie>, andi@...stfloor.org,
	Rik van Riel <riel@...hat.com>,
	Pekka Enberg <penberg@...helsinki.fi>, mpm@...enic.com
Subject: Re: [patch 18/21] Filesystem: Socket inode defragmentation

On Tue, 13 May 2008, Evgeniy Polyakov wrote:

> Out of curiosity, how can you drop socket inode, since it is always
> attached to socket which is removed automatically when connection is
> closed. Any force of dropping socket inode can only result in connection
> drop, i.e. there are no inodes, which are placed in cache and are not
> yet freed, if there are no attached sockets.
> 
> So question is how does it work for sockets?

All inodes are inactivated and put on a lru before they are freed. Those 
could be reclaimed by inode defrag. Socket inode defrag is not that 
important. Just shows that this can be applied in a general way.


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