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Date:	Wed, 11 Jul 2012 13:17:10 -0400
From:	Ted Ts'o <tytso@....edu>
To:	Dmitry Monakhov <dmonakhov@...nvz.org>
Cc:	linux-ext4@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	jack@...e.cz
Subject: Re: [PATCH 2/3] ext4: Implement subtree ID support for ext4
 filesystem

On Wed, Jul 11, 2012 at 07:26:25PM +0400, Dmitry Monakhov wrote:
> Yes this looks reasonable, the only thing that we should aware of is id
> collision. We have to reserve pool numbers to quota group id's.
> This can be easily solved by changing disk structure of quota-file
> to use u64 on uid.

How many pool id's are you anticipating?  Is 32-bits really not
enough?  I'll note that uid_t and gid_t is only 32-bits today, and
part of my goal is to try to preserve compatibility with the existing
quota infrastructure.

							- Ted
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