linux-kernel - Re: btrfs: compression breaks cp and cross-FS mv, FS_IOC

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Message-ID: <20110213161329.GL19533@dhcp231-156.rdu.redhat.com>
Date:	Sun, 13 Feb 2011 11:13:30 -0500
From:	Josef Bacik <josef@...hat.com>
To:	Marti Raudsepp <marti@...fo.org>
Cc:	Josef Bacik <josef@...hat.com>,
	btrfs hackers <linux-btrfs@...r.kernel.org>,
	Kernel hackers <linux-kernel@...r.kernel.org>
Subject: Re: btrfs: compression breaks cp and cross-FS mv, FS_IOC_FIEMAP
	bug?

On Sun, Feb 13, 2011 at 06:07:36PM +0200, Marti Raudsepp wrote:
> On Sun, Feb 13, 2011 at 17:57, Josef Bacik <josef@...hat.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 
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