Date: Sun, 19 Mar 2017 20:09:42 +0000
From: Mel Gorman <mgorman@techsingularity.net>
To: J?r?me Glisse <jglisse@redhat.com>
Cc: akpm@linux-foundation.org, linux-kernel@vger.kernel.org,
        linux-mm@kvack.org, John Hubbard <jhubbard@nvidia.com>,
        Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>,
        David Nellans <dnellans@nvidia.com>,
        Evgeny Baskakov <ebaskakov@nvidia.com>,
        Mark Hairgrove <mhairgrove@nvidia.com>,
        Sherry Cheung <SCheung@nvidia.com>, Subhash Gutti <sgutti@nvidia.com>
Subject: Re: [HMM 11/16] mm/hmm/mirror: helper to snapshot CPU page table v2
Message-ID: <20170319200942.GI2774@techsingularity.net>
References: <1489680335-6594-1-git-send-email-jglisse@redhat.com>
 <1489680335-6594-12-git-send-email-jglisse@redhat.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=iso-8859-15
Content-Disposition: inline
In-Reply-To: <1489680335-6594-12-git-send-email-jglisse@redhat.com>
User-Agent: Mutt/1.5.24 (2015-08-30)
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 414
Lines: 11

On Thu, Mar 16, 2017 at 12:05:30PM -0400, J?r?me Glisse wrote:
> This does not use existing page table walker because we want to share
> same code for our page fault handler.
> 
> Changes since v1:
>   - Use spinlock instead of rcu synchronized list traversal
> 

Didn't look too closely here because pagetable walking code tends to have
few surprises but presumably there will be some 5-level page table
updates.