From patchwork Tue Jul 17 22:47:45 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alex Williamson X-Patchwork-Id: 945397 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=nongnu.org (client-ip=2001:4830:134:3::11; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=redhat.com Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 41Vb6Z3Lg5z9s0w for ; Wed, 18 Jul 2018 08:48:38 +1000 (AEST) Received: from localhost ([::1]:33754 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ffYlo-0005W1-2n for incoming@patchwork.ozlabs.org; Tue, 17 Jul 2018 18:48:36 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:49414) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ffYl6-0005Uf-07 for qemu-devel@nongnu.org; Tue, 17 Jul 2018 18:47:53 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ffYl1-0000oU-6e for qemu-devel@nongnu.org; Tue, 17 Jul 2018 18:47:52 -0400 Received: from mx1.redhat.com ([209.132.183.28]:36534) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1ffYl0-0000o7-V9 for qemu-devel@nongnu.org; Tue, 17 Jul 2018 18:47:47 -0400 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id F15275F7A0; Tue, 17 Jul 2018 22:47:45 +0000 (UTC) Received: from gimli.home (ovpn-116-29.phx2.redhat.com [10.3.116.29]) by smtp.corp.redhat.com (Postfix) with ESMTP id 9ABC01992A; Tue, 17 Jul 2018 22:47:45 +0000 (UTC) From: Alex Williamson To: qemu-devel@nongnu.org Date: Tue, 17 Jul 2018 16:47:45 -0600 Message-ID: <20180717224745.14019.33974.stgit@gimli.home> In-Reply-To: <20180717222721.14019.27548.stgit@gimli.home> References: <20180717222721.14019.27548.stgit@gimli.home> User-Agent: StGit/0.18-102-gdf9f MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.39]); Tue, 17 Jul 2018 22:47:46 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [RFC PATCH 2/3] kvm: Use inhibit to prevent ballooning without synchronous mmu X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kvm@vger.kernel.org Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Remove KVM specific tests in balloon_page(), instead marking ballooning as inhibited without KVM_CAP_SYNC_MMU support. Signed-off-by: Alex Williamson --- accel/kvm/kvm-all.c | 4 ++++ hw/virtio/virtio-balloon.c | 4 +--- 2 files changed, 5 insertions(+), 3 deletions(-) diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c index eb7db92a5e3b..38f468d8e2b1 100644 --- a/accel/kvm/kvm-all.c +++ b/accel/kvm/kvm-all.c @@ -39,6 +39,7 @@ #include "trace.h" #include "hw/irq.h" #include "sysemu/sev.h" +#include "sysemu/balloon.h" #include "hw/boards.h" @@ -1698,6 +1699,9 @@ static int kvm_init(MachineState *ms) s->many_ioeventfds = kvm_check_many_ioeventfds(); s->sync_mmu = !!kvm_vm_check_extension(kvm_state, KVM_CAP_SYNC_MMU); + if (!s->sync_mmu) { + qemu_balloon_inhibit(true); + } return 0; diff --git a/hw/virtio/virtio-balloon.c b/hw/virtio/virtio-balloon.c index 1f7a87f09429..b5425080c5fb 100644 --- a/hw/virtio/virtio-balloon.c +++ b/hw/virtio/virtio-balloon.c @@ -21,7 +21,6 @@ #include "hw/mem/pc-dimm.h" #include "sysemu/balloon.h" #include "hw/virtio/virtio-balloon.h" -#include "sysemu/kvm.h" #include "exec/address-spaces.h" #include "qapi/error.h" #include "qapi/qapi-events-misc.h" @@ -36,8 +35,7 @@ static void balloon_page(void *addr, int deflate) { - if (!qemu_balloon_is_inhibited() && (!kvm_enabled() || - kvm_has_sync_mmu())) { + if (!qemu_balloon_is_inhibited()) { qemu_madvise(addr, BALLOON_PAGE_SIZE, deflate ? QEMU_MADV_WILLNEED : QEMU_MADV_DONTNEED); }