linux-kernel - Re: [PATCH 08/17] blkcg: shoot down blkio

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Message-ID: <20120123203312.GL12652@google.com>
Date:	Mon, 23 Jan 2012 12:33:12 -0800
From:	Tejun Heo <tj@...nel.org>
To:	Vivek Goyal <vgoyal@...hat.com>
Cc:	axboe@...nel.dk, ctalbott@...gle.com, rni@...gle.com,
	linux-kernel@...r.kernel.org,
	Lennart Poettering <mzxreary@...inter.de>
Subject: Re: [PATCH 08/17] blkcg: shoot down blkio_groups on elevator switch

On Mon, Jan 23, 2012 at 02:57:17PM -0500, Vivek Goyal wrote:
> It would be good if you add one more part to your series (say part4) to
> make it happen. We probably don't want to get into mess that from kernel
> version A to B we had x behavior, from B to C we broke changed it to y
> and in kernel version D we restored it back to x. User space now go
> figure what kernel version you are running and behave appropriately. For
> distributions supporting these different kernels will become a mess.
> 
> So IMHO, if you can keep pol-specific clearing part a separate series
> which gets committed in the same kernel version, would help a lot.

Sure, we're at the beginning of this devel window.  I'm fairly sure
we'll have enough time to sort it out before the next merge window.

-- 
tejun
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