From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lb0-f177.google.com (mail-lb0-f177.google.com [209.85.217.177]) by kanga.kvack.org (Postfix) with ESMTP id EAC2E6B0036 for ; Thu, 22 May 2014 01:32:50 -0400 (EDT) Received: by mail-lb0-f177.google.com with SMTP id s7so2246363lbd.36 for ; Wed, 21 May 2014 22:32:50 -0700 (PDT) Received: from mail-la0-x235.google.com (mail-la0-x235.google.com [2a00:1450:4010:c03::235]) by mx.google.com with ESMTPS id kv5si22399616lac.74.2014.05.21.22.32.48 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Wed, 21 May 2014 22:32:49 -0700 (PDT) Received: by mail-la0-f53.google.com with SMTP id ty20so701385lab.40 for ; Wed, 21 May 2014 22:32:48 -0700 (PDT) Date: Thu, 22 May 2014 09:32:47 +0400 From: Cyrill Gorcunov 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> Sender: owner-linux-mm@kvack.org List-ID: To: "Kirill A. Shutemov" Cc: Andrew Morton , Pavel Emelyanov , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Andrea Arcangeli , Dave Hansen , Naoya Horiguchi 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 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org