linux-kernel - Re: [git pull] vfs pile 3

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Message-ID: <20121013160455.GA32420@infradead.org>
Date:	Sat, 13 Oct 2012 12:04:55 -0400
From:	Christoph Hellwig <hch@...radead.org>
To:	Al Viro <viro@...IV.linux.org.uk>
Cc:	Christoph Hellwig <hch@...radead.org>,
	Marco Stornelli <marco.stornelli@...il.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: Re: [git pull] vfs pile 3

On Sat, Oct 13, 2012 at 05:01:15PM +0100, Al Viro wrote:
> You know, I'm in the middle of dealing with one such TODO.  Yours, as it
> were.  From six years ago.  kernel_thread() unexporting.  TODO comments
> of any form are routinely shat upon and ignored, especially when shuffled
> away into less read parts of the tree... ;-/
> 
> I'd rather see it done fs-by-fs.  Starting with something reasonably easy
> to test - minixfs would do nicely.  Don't get me wrong - I'm all for
> burying ->truncate(); what I'm worried about is that we'll end up burying
> the warning about the reasons why vmtruncate() was a bad idea, leaving the
> functionality exactly as it used to be...

As mentioned I agree with the concern in principle.  Let's start by
taking Marco's patches for filesystems that use vmtruncate but don't 
actually implement ->truncate.  There's a few I remember offhand, e.g.
procfs and ufs right now.  Then we can do the actual work required ones
piece by piece.
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