Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751995AbaGGPby (ORCPT ); Mon, 7 Jul 2014 11:31:54 -0400 Received: from e06smtp10.uk.ibm.com ([195.75.94.106]:33835 "EHLO e06smtp10.uk.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750934AbaGGPbw (ORCPT ); Mon, 7 Jul 2014 11:31:52 -0400 Date: Mon, 7 Jul 2014 17:31:43 +0200 From: Gerald Schaefer To: Minchan Kim Cc: Andrew Morton , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Michael Kerrisk , Linux API , Hugh Dickins , Johannes Weiner , Rik van Riel , KOSAKI Motohiro , Mel Gorman , Jason Evans , Zhang Yanfei , "Kirill A. Shutemov" , Martin Schwidefsky , Heiko Carstens , Dominik Dingel , Christian Borntraeger , linux-s390@vger.kernel.org Subject: Re: [PATCH v10 5/7] s390: add pmd_[dirty|mkclean] for THP Message-ID: <20140707173143.271bbd52@thinkpad> In-Reply-To: <1404694438-10272-6-git-send-email-minchan@kernel.org> References: <1404694438-10272-1-git-send-email-minchan@kernel.org> <1404694438-10272-6-git-send-email-minchan@kernel.org> X-Mailer: Claws Mail 3.8.1 (GTK+ 2.24.13; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 14070715-4966-0000-0000-000000A3219E Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 7 Jul 2014 09:53:56 +0900 Minchan Kim wrote: > MADV_FREE needs pmd_dirty and pmd_mkclean for detecting recent > overwrite of the contents since MADV_FREE syscall is called for > THP page but for s390 pmds only referenced bit is available > because there is no free bit left in the pmd entry for the > software dirty bit so this patch adds dumb pmd_dirty which > returns always true by suggesting by Martin. > > They finally find a solution in future. > http://marc.info/?l=linux-api&m=140440328820808&w=2 > > Cc: Martin Schwidefsky > Cc: Heiko Carstens > Cc: Gerald Schaefer > Cc: Dominik Dingel > Cc: Christian Borntraeger > Cc: linux-s390@vger.kernel.org > Signed-off-by: Minchan Kim > --- > arch/s390/include/asm/pgtable.h | 12 ++++++++++++ > 1 file changed, 12 insertions(+) Acked-by: Gerald Schaefer -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/