Date: Mon, 1 Oct 2012 20:05:00 +0200
From: Andrea Arcangeli <aarcange@redhat.com>
To: "H. Peter Anvin" <hpa@linux.intel.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
        Andrew Morton <akpm@linux-foundation.org>, linux-mm@kvack.org,
        Andi Kleen <ak@linux.intel.com>, linux-kernel@vger.kernel.org,
        "Kirill A. Shutemov" <kirill@shutemov.name>,
        Arnd Bergmann <arnd@arndb.de>, Ingo Molnar <mingo@kernel.org>,
        linux-arch@vger.kernel.org
Subject: Re: [PATCH 0/3] Virtual huge zero page
Message-ID: <20121001180500.GF18051@redhat.com>
References: <1348875441-19561-1-git-send-email-kirill.shutemov@linux.intel.com>
 <20120929134811.GC26989@redhat.com>
 <5069B804.6040902@linux.intel.com>
 <20121001163118.GC18051@redhat.com>
 <5069CCF9.7040309@linux.intel.com>
 <20121001172624.GD18051@redhat.com>
 <5069D3D8.9070805@linux.intel.com>
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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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