From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christoph Hellwig <hch@infradead.org>
Subject: Re: [PATCH][RESEND] vfs: allow /proc/PID/maps to get device from stat
Date: Thu, 8 Aug 2013 06:48:05 -0700
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Cc: Christoph Hellwig <hch@infradead.org>,
	Mark Fasheh <mfasheh@suse.de>, viro@ZenIV.linux.org.uk,
	linux-fsdevel@vger.kernel.org, linux-btrfs@vger.kernel.org,
	Chris Mason <chris.mason@fusionio.com>,
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To: Josef Bacik <jbacik@fusionio.com>
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On Thu, Aug 08, 2013 at 09:02:07AM -0400, Josef Bacik wrote:
> This won't work, try having 10000 subvolumes with dirty inodes and do sync then
> go skiing, you'll have time :).  Thanks,

Why would the dirty inodes make any difference?  If you share the bdi
between the subvolumes the sync workflow should be exactly the same
still.