Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756279Ab3GCNCL (ORCPT ); Wed, 3 Jul 2013 09:02:11 -0400 Received: from e06smtp13.uk.ibm.com ([195.75.94.109]:41397 "EHLO e06smtp13.uk.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753053Ab3GCNCI (ORCPT ); Wed, 3 Jul 2013 09:02:08 -0400 From: Martin Schwidefsky To: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Andrew Morton , Mel Gorman , Nick Piggin , Hugh Dickins , Rik van Riel Cc: Martin Schwidefsky Subject: [RFC][PATCH 0/2] s390/kvm: add kvm support for guest page hinting Date: Wed, 3 Jul 2013 15:01:50 +0200 Message-Id: <1372856512-25710-1-git-send-email-schwidefsky@de.ibm.com> X-Mailer: git-send-email 1.7.9.5 X-TM-AS-MML: No X-Content-Scanned: Fidelis XPS MAILER x-cbid: 13070312-2966-0000-0000-0000080A81E8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1719 Lines: 40 Linux on s390 as a guest under z/VM has been using the guest page hinting interface (alias collaborative memory management) for a long time. The full version with volatile states has been deemed to be too complicated (see the old discussion about guest page hinting e.g. on http://marc.info/?l=linux-mm&m=123816662017742&w=2). What is currently implemented for the guest is the unused and stable states to mark unallocated pages as freely available to the host. This works just fine with z/VM as the host. The two patches in this series implement the guest page hinting interface for the unused and stable states in the KVM host. Most of the code specific to s390 but there is a common memory management part as well, see patch #1. The circus is back ;-) Konstantin Weitz (2): mm: add support for discard of unused ptes s390/kvm: support collaborative memory management arch/s390/include/asm/kvm_host.h | 8 +++- arch/s390/include/asm/pgtable.h | 24 ++++++++++++ arch/s390/kvm/kvm-s390.c | 24 ++++++++++++ arch/s390/kvm/kvm-s390.h | 2 + arch/s390/kvm/priv.c | 37 ++++++++++++++++++ arch/s390/mm/pgtable.c | 77 ++++++++++++++++++++++++++++++++++++++ include/asm-generic/pgtable.h | 13 +++++++ include/linux/rmap.h | 1 + mm/rmap.c | 28 +++++++++++++- mm/vmscan.c | 3 ++ 10 files changed, 214 insertions(+), 3 deletions(-) -- 1.7.9.5 -- 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/