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From: Christoph Hellwig <hch@infradead.org>
Subject: Re: [PATCH v2] Support for write stream IDs
Date: Tue, 5 May 2015 13:50:41 -0700
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Cc: Christoph Hellwig <hch@infradead.org>,
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To: Jens Axboe <axboe@fb.com>
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On Tue, May 05, 2015 at 02:31:34PM -0600, Jens Axboe wrote:
> There is a user, we are using it. And there's no data structure bloating,
> both the file and inode additions are filling existing holes.

FYI, they do increase the size on any 32-bit architecture, which is
where it hurts most.