linux-kernel - Re: [PATCH 4/4] fs: remove inode_lock from iput_final and prune

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Message-ID: <1288154866.2652.84.camel@edumazet-laptop>
Date:	Wed, 27 Oct 2010 06:47:46 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Al Viro <viro@...IV.linux.org.uk>
Cc:	Dave Chinner <david@...morbit.com>, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/4] fs: remove inode_lock from iput_final and
 prune_icache

Le mercredi 27 octobre 2010 à 05:40 +0100, Al Viro a écrit :
> On Wed, Oct 27, 2010 at 03:23:04PM +1100, Dave Chinner wrote:
> > From: Dave Chinner <dchinner@...hat.com>
> > 
> > Now that inode state changes are protected by the inode->i_lock and
> > the inode LRU manipulations by the inode_lru_lock, we can remove the
> > inode_lock from prune_icache and the initial part of iput_final().
> > 
> > instead of using the inode_lock to protect the inode during
> > iput_final, use the inode->i_lock instead. This protects the inode
> > against new references being taken while we change the inode state
> > to I_FREEING, as well as preventing prune_icache from grabbing the
> > inode while we are manipulating it. Hence we no longer need the
> > i???ode_lock in iput_final prior to setting I_FREEING on the inode.
>   ^^^^^^^^^^^^
> 
> ... the hell?  There's more such damage elsewhere in the thread; what's
> going on?
> --

Maybe its on your side, no problem here on my copy.


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