linux-kernel - Re: [PATCH v2] Support for write stream IDs

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Date:	Tue, 5 May 2015 13:20:45 -0700
From:	Christoph Hellwig <hch@...radead.org>
To:	Jens Axboe <axboe@...com>
Cc:	Christoph Hellwig <hch@...radead.org>,
	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	adilger@...ger.ca, david@...morbit.com
Subject: Re: [PATCH v2] Support for write stream IDs

On Tue, May 05, 2015 at 02:12:01PM -0600, Jens Axboe wrote:
> We can't merge the NVMe bits until the proposal is included/finalized. But
> this is a problem. I don't want to add this to the Facebook kernel until we
> know the API is stable, while I have no problem adding experimental NVMe
> changes since those can be easily updated without impacting applications.
> The latter is not true for the user interface.

They might never be finalized, and even if they are mere mortals might
never get this hardware.  Merging infrastructure without any users is a
bad idea in general, and merging infrastructure with no user that
exposes untestable user interface and bloats core data structures is
even worse.  I don't think this has any merit at all at this point.
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