linux-kernel - Re: [git pull] drm fixes

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Date:	Tue, 8 Jun 2010 01:30:15 +0100
From:	Al Viro <viro@...IV.linux.org.uk>
To:	David Woodhouse <dwmw2@...radead.org>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Dave Airlie <airlied@...ux.ie>,
	dri-devel@...ts.freedesktop.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [git pull] drm fixes

On Mon, Jun 07, 2010 at 10:39:28PM +0100, David Woodhouse wrote:
> On Mon, 2010-06-07 at 14:17 -0700, Linus Torvalds wrote:
> > and that changelog doesn't really explain it either ("fix leak"? Ok, I can 
> > see the iput() fixing the leak - but you also did that jffs2_clear_inode() 
> > change, and that has no explanation what-so-ever.
> 
> jffs2_clear_inode() is the file system's ->clear_inode method, so it
> gets called from the VFS when the inode is destroyed, after iput().
> 
> I suppose that ought to have been a clue, right from the very beginning,
> that we should never have been calling it directly on our error paths.

Yep.  The other place that directly called its ->clear_inode() also had
been bogus, BTW - logfs had been playing rather sick games with special
inodes and ended up open-coding just about everything on new_inode/iput
paths for those.  They needed that stuff evicted after all normal inodes,
but before the second call of invalidate_inodes() would scream about
surviving busy inodes.  I.e. that should've been happening in ->put_super();
no need to deal with handcrafted inodes that would sit outside of inode
list...
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