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Date: Thu, 12 Nov 2015 14:09:01 +0100
From: David Sterba <dsterba@suse.cz>
To: Holger =?iso-8859-1?Q?Hoffst=E4tte?=
	<holger.hoffstaette@googlemail.com>,
        Stefan Priebe - Profihost AG <s.priebe@profihost.ag>,
        "linux-btrfs@vger.kernel.org" <linux-btrfs@vger.kernel.org>
Subject: Re: Regression in btrfs: properly set the termination value of
 ctx->pos in readdir
Message-ID: <20151112130901.GJ6445@suse.cz>
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On Thu, Nov 12, 2015 at 11:35:23AM +0100, David Sterba wrote:
> On Wed, Nov 11, 2015 at 01:22:19PM +0100, Holger Hoffstätte wrote:
> > > the patch btrfs: properly set the termination value of ctx->pos in
> > > readdir introduces a regression to me.
> > >
> > > A lot of stuff runs in "endless" or long running loops.
> > 
> > Just tested this and can confirm something is off.
> > In a directory with several files, create a new directory and move all
> > files into the new subdir.
> > 
> > An immediately following ls will hang. The problem goes away after a
> > manual sync.
> 
> I can reproduce the hang, thanks.

The hang was triggered by use of trace_printk and I'm seeing several
strange bugs caused by added debugging, so I can't say I can reproduce
it yet.