linux-kernel - Re: [PATCH 0/3] Virtual huge zero page

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Message-ID: <20121001180500.GF18051@redhat.com>
Date:	Mon, 1 Oct 2012 20:05:00 +0200
From:	Andrea Arcangeli <aarcange@...hat.com>
To:	"H. Peter Anvin" <hpa@...ux.intel.com>
Cc:	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
	Andi Kleen <ak@...ux.intel.com>, linux-kernel@...r.kernel.org,
	"Kirill A. Shutemov" <kirill@...temov.name>,
	Arnd Bergmann <arnd@...db.de>, Ingo Molnar <mingo@...nel.org>,
	linux-arch@...r.kernel.org
Subject: Re: [PATCH 0/3] Virtual huge zero page

On Mon, Oct 01, 2012 at 10:33:12AM -0700, H. Peter Anvin wrote:
> ... and I think it would be worthwhile to know which effect dominates
> (or neither, in which case it doesn't matter).
> 
> Overall, I'm okay with either as long as we don't lock down 2 MB when
> there isn't a huge zero page in use.

Same here.

I agree the cmpxchg idea to free the 2M zero page, was a very nice
addition to the physical zero page patchset.
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