GNU bug report logs - #8001
cp (8.10) sparse handling fails on compressed btrfs (cp/fiemap-2)

Previous Next

Full log

Message #20 received at 8001 <at> debbugs.gnu.org (full text, mbox):

From: Pádraig Brady <P <at> draigBrady.com>
To: Mike Frysinger <vapier <at> gentoo.org>
Cc: BTRFS MAILING LIST <linux-btrfs <at> vger.kernel.org>, 8001 <at> debbugs.gnu.org
Subject: Re: bug#8001: cp (8.10) sparse handling fails on compressed btrfs
	(cp/fiemap-2)
Date: Sat, 19 Feb 2011 23:22:15 +0000

On 19/02/11 18:28, Mike Frysinger wrote:
> based on other threads (which i havent been following too closely), did we 
> settle on this being a btrfs bug ?
> -mike

Nope, cp 8.10 is not absolved yet.
It may be btrfs not honoring FIEMAP_FLAG_SYNC,
and/or it may be cp needing to handle FIEMAP_EXTENT_ENCODED
specially.

It would help if you ran `sync` before the copy,
to exclude that as a possible issue.

Also `filefrag -v` output for the file on
the compressed BTRFS file system would be helpful.

thanks,
Pádraig.

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.