linux-kernel - Re: 2.6.21-git10/11: files getting truncated on xfs? or maybe an nlink problem?

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Message-ID: <20070509224423.GL11115@waste.org>
Date:	Wed, 9 May 2007 17:44:23 -0500
From:	Matt Mackall <mpm@...enic.com>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	David Chinner <dgc@....com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: 2.6.21-git10/11: files getting truncated on xfs? or maybe an nlink problem?

On Wed, May 09, 2007 at 03:17:58PM -0700, Jeremy Fitzhardinge wrote:
> Matt Mackall wrote:
> >> Mercurial uses a strictly append-only model for updating its repo files,
> >> but it looks like maybe an append operation didn't stick.
> >>     
> >
> > (Unless you're using the mq extension, which regularly truncates
> > files. But you're definitely the first person to run into this sort of
> > thing in any case.)
> >   
> 
> Which I am, extensively, but not on the repo that got damaged.  That's
> why I was wondering about the nlink issues.  If I qpop a bunch of
> patches after just pushing them, won't it simply truncate the file?

Yep. But it will break links before doing that. Basically all opens go
through a function that breaks links.

-- 
Mathematics is the supreme nostalgia of our time.
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