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Date: Mon, 10 Feb 2014 12:03:51 -0500
From: Chris Mason <clm@fb.com>
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To: David Sterba <dsterba@suse.cz>, <linux-btrfs@vger.kernel.org>
CC: Jeff Mahoney <jeffm@suse.com>, Josef Bacik <jbacik@fb.com>
Subject: Re: [PATCH 3/4][RFC] btrfs: export global block reserve size as space_info
References: <cover.1391779611.git.dsterba@suse.cz> <21dfbfe3b1361092ad1dc286f636c1fff4a2a4f6.1391779611.git.dsterba@suse.cz>
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On 02/07/2014 08:34 AM, David Sterba wrote:
> Introduce a block group type bit for a global reserve and fill the space
> info for SPACE_INFO ioctl. This should replace the newly added ioctl
> (01e219e8069516cdb98594d417b8bb8d906ed30d) to get just the 'size' part
> of the global reserve, while the actual usage can be now visible in the
> 'btrfs fi df' output during ENOSPC stress.
>
> The unpatched userspace tools will show the blockgroup as 'unknown'.
>

This wasn't in my rc2 pull because I wanted to sync up with Jeff on it. 
  I like the idea of combining this into SPACE_INFO, any objections?

-chris