From: Liu Bo <bo.li.liu@oracle.com>
To: Josef Bacik <jbacik@fusionio.com>
Cc: linux-btrfs@vger.kernel.org, dsterba@suse.cz, jeff.liu@oracle.com
Subject: Re: [PATCH] Btrfs: export btrfs space shared info to userspace
Date: Fri, 20 Sep 2013 08:22:30 +0800 [thread overview]
Message-ID: <20130920002229.GA19110@localhost.localdomain> (raw)
In-Reply-To: <20130918205304.GA1615@localhost.localdomain>
On Wed, Sep 18, 2013 at 04:53:04PM -0400, Josef Bacik wrote:
> On Mon, Sep 16, 2013 at 03:40:12PM +0800, Liu Bo wrote:
> > Similar to ocfs2, btrfs also supports that extents can be shared by
> > different inodes, and there are some userspace tools requesting
> > for this kind of 'space shared infomation'.[1]
> >
> > ocfs2 uses flag FIEMAP_EXTENT_SHARED, so does btrfs.
> >
> > [1]: http://thr3ads.net/ocfs2-devel/2010/09/489052-PATCH-3-3-shared-du-using-fiemap-to-figure-up-the-shared-extents-per-file-and-the-footprint-in
> >
> > Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
> > ---
> > RFC->PATCH: use type 'unsigned long' instead of 'int', as David suggested.
>
> This broke any xfstest that used fiemap, so generic/255, generic/316 and
> shared/218. Thanks,
I'll look into it ASAP, thanks, Josef.
-liubo
prev parent reply other threads:[~2013-09-20 0:22 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-16 7:40 [PATCH] Btrfs: export btrfs space shared info to userspace Liu Bo
2013-09-18 20:53 ` Josef Bacik
2013-09-20 0:22 ` Liu Bo [this message]
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