linux-kernel - Re: ext3: slow symlink corruption on umount...

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Message-Id: <200810312047.20306.nickpiggin@yahoo.com.au>
Date:	Fri, 31 Oct 2008 20:47:20 +1100
From:	Nick Piggin <nickpiggin@...oo.com.au>
To:	Eric Sandeen <sandeen@...hat.com>
Cc:	Theodore Tso <tytso@....edu>, Arthur Jones <ajones@...erbed.com>,
	"linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>,
	sct@...hat.com, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org
Subject: Re: ext3: slow symlink corruption on umount...

On Friday 31 October 2008 00:38, Eric Sandeen wrote:
> Theodore Tso wrote:
> > On Wed, Oct 29, 2008 at 03:36:33PM -0500, Eric Sandeen wrote:
> >> Sorry for the silence, this is a nice bug you've found :)
> >>
> >> I'll look into it ...
> >
> > You may want to take a quick look at this thread:
> >
> >     http://lkml.org/lkml/2008/10/28/413
> >
> > 					- Ted
>
> I thought about that, but at least at first glance I don't see how the
> gfp mask change would cause this behavior...?  At least, I don't think
> we're seeing recursion back into the filesystem... but I'll ponder that.

That's definitely a bug which I'll have to fix for 2.6.28, but
I agree it's unlikely to recurse frequently like this (would only
happen under high memory pressure, and only when writeout from
page reclaim happens).


> (Also, Arthur reports seeing this as long ago as 2.6.9...)

OK, well that would confirm it.
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