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Date: Sun, 13 Feb 2011 11:13:30 -0500
From: Josef Bacik <josef@redhat.com>
To: Marti Raudsepp <marti@juffo.org>
Cc: Josef Bacik <josef@redhat.com>,
        btrfs hackers <linux-btrfs@vger.kernel.org>,
        Kernel hackers <linux-kernel@vger.kernel.org>
Subject: Re: btrfs: compression breaks cp and cross-FS mv, FS_IOC_FIEMAP
	bug?
Message-ID: <20110213161329.GL19533@dhcp231-156.rdu.redhat.com>
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On Sun, Feb 13, 2011 at 06:07:36PM +0200, Marti Raudsepp wrote:
> On Sun, Feb 13, 2011 at 17:57, Josef Bacik <josef@redhat.com> wrote:
> > Does the same problem happen when you use cp --sparse=never?
> 
> You are right. cp --sparse=never does not cause data loss.
>

So fiemap probably isn't doing the right thing when compression is enabled,
which doesn't suprise me since we don't do the right thing with delalloc either.
I will try and get to this soon.  Thanks,

Josef