From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751640AbaEVFcv (ORCPT ); Thu, 22 May 2014 01:32:51 -0400 Received: from mail-lb0-f169.google.com ([209.85.217.169]:55092 "EHLO mail-lb0-f169.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751146AbaEVFcu (ORCPT ); Thu, 22 May 2014 01:32:50 -0400 Date: Thu, 22 May 2014 09:32:47 +0400 From: Cyrill Gorcunov To: "Kirill A. Shutemov" Cc: Andrew Morton , Pavel Emelyanov , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Andrea Arcangeli , Dave Hansen , Naoya Horiguchi Subject: Re: [PATCH] mm: /prom/pid/clear_refs: avoid split_huge_page() Message-ID: <20140522053247.GA8946@moon> References: <1400699062-20123-1-git-send-email-kirill.shutemov@linux.intel.com> <20140521123446.ae45fa676cae27fffbd96cfd@linux-foundation.org> <20140522011110.B0090E009B@blue.fi.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20140522011110.B0090E009B@blue.fi.intel.com> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, May 22, 2014 at 04:11:10AM +0300, Kirill A. Shutemov wrote: > Andrew Morton wrote: > > On Wed, 21 May 2014 22:04:22 +0300 "Kirill A. Shutemov" wrote: > > > > > Currently we split all THP pages on any clear_refs request. It's not > > > necessary. We can handle this on PMD level. > > > > > > One side effect is that soft dirty will potentially see more dirty > > > memory, since we will mark whole THP page dirty at once. > > > > This clashes pretty badly with > > http://ozlabs.org/~akpm/mmots/broken-out/clear_refs-redefine-callback-functions-for-page-table-walker.patch > > Hm.. For some reason CRIU memory-snapshotting test cases fail on current > linux-next. I didn't debug why. Mainline works. Folks? Thanks for noticing, Kirill! I don't test linux-test regulary will try and report the results. Cyrill