linux-kernel - Re: [PATCH 15/18] fs: introduce a per-cpu last

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Message-ID: <1286533247.2959.129.camel@edumazet-laptop>
Date:	Fri, 08 Oct 2010 12:20:47 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Al Viro <viro@...IV.linux.org.uk>
Cc:	Andi Kleen <andi@...stfloor.org>,
	Dave Chinner <david@...morbit.com>,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 15/18] fs: introduce a per-cpu last_ino allocator

Le vendredi 08 octobre 2010 à 11:19 +0100, Al Viro a écrit :
> On Fri, Oct 08, 2010 at 12:09:44PM +0200, Andi Kleen wrote:
> 
> > > Can be done if you bother to add ->getattr() for those, but you'll need
> > > to do some kind of lazy allocation of inumbers for those; fstat() _will_
> > > want st_ino.
> > 
> > Why not just put 0 in st_ino for sockets/pipes/etc. ? 
> 
> Because it's a userland-visible change; right now you can compare
> i_ino for sockets...

lsof for example uses i_ino



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