linux-kernel - Re: remove zero_page (was Re: -mm merge plans for 2.6.24)

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Date:	Wed, 10 Oct 2007 05:06:18 +0100 (BST)
From:	Hugh Dickins <hugh@...itas.com>
To:	Nick Piggin <nickpiggin@...oo.com.au>
cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: remove zero_page (was Re: -mm merge plans for 2.6.24)

On Tue, 9 Oct 2007, Nick Piggin wrote:
> by it ;) To prove my point: the *first* approach I posted to fix this
> problem was exactly a patch to special-case the zero_page refcounting
> which was removed with my PageReserved patch. Neither Hugh nor yourself
> liked it one bit!

True (speaking for me; I forget whether Linus ever got to see it).

I apologize to you, Nick, for getting you into this position of
fighting for something which wasn't your choice in the first place.

If I thought we'd have a better kernel by dropping this patch and
going back to one that just avoids the refcounting, I'd say do it.
No, I still think it's worth trying this one first.

But best have your avoid-the-refcounting patch ready and reviewed
for emergency use if regression does show up somewhere.

Thanks,
Hugh

[My mails out are at present getting randomly delayed by six hours or
so, which makes it extra hard for me to engage usefully in any thread.]
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