From nobody Thu Nov 6 18:19:02 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=intel.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 154227875803365.61830417852264; Thu, 15 Nov 2018 02:45:58 -0800 (PST) Received: from localhost ([::1]:37988 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gNF9o-0007RN-U0 for importer@patchew.org; Thu, 15 Nov 2018 05:45:56 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:57652) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gNF5I-0003nF-Kz for qemu-devel@nongnu.org; Thu, 15 Nov 2018 05:41:17 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gNF5H-0000tw-JP for qemu-devel@nongnu.org; Thu, 15 Nov 2018 05:41:16 -0500 Received: from mga03.intel.com ([134.134.136.65]:14567) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gNF5H-0000oM-AE for qemu-devel@nongnu.org; Thu, 15 Nov 2018 05:41:15 -0500 Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 15 Nov 2018 02:41:15 -0800 Received: from devel-ww.sh.intel.com ([10.239.48.119]) by fmsmga004.fm.intel.com with ESMTP; 15 Nov 2018 02:41:13 -0800 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.56,236,1539673200"; d="scan'208";a="106467299" From: Wei Wang To: qemu-devel@nongnu.org, virtio-dev@lists.oasis-open.org, mst@redhat.com, quintela@redhat.com, dgilbert@redhat.com Date: Thu, 15 Nov 2018 18:08:02 +0800 Message-Id: <1542276484-25508-7-git-send-email-wei.w.wang@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1542276484-25508-1-git-send-email-wei.w.wang@intel.com> References: <1542276484-25508-1-git-send-email-wei.w.wang@intel.com> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 134.134.136.65 Subject: [Qemu-devel] [PATCH v9 6/8] migration/ram.c: add a function to disable the bulk stage 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: liliang.opensource@gmail.com, peterx@redhat.com, wei.w.wang@intel.com, pbonzini@redhat.com, nilal@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" This patch adds a function to enable a precopy notifier callback outside the migration subsystem to disable the bulk stage flag. This is needed by the free page optimization offered by virtio-balloon. Signed-off-by: Wei Wang CC: Dr. David Alan Gilbert CC: Juan Quintela CC: Michael S. Tsirkin CC: Peter Xu --- include/migration/misc.h | 1 + migration/ram.c | 9 +++++++++ 2 files changed, 10 insertions(+) diff --git a/include/migration/misc.h b/include/migration/misc.h index 0bac623..67cb275 100644 --- a/include/migration/misc.h +++ b/include/migration/misc.h @@ -30,6 +30,7 @@ typedef enum PrecopyNotifyReason { void precopy_infrastructure_init(void); void precopy_add_notifier(Notifier *n); void precopy_remove_notifier(Notifier *n); +void precopy_disable_bulk_stage(void); =20 void ram_mig_init(void); void qemu_guest_free_page_hint(void *addr, size_t len); diff --git a/migration/ram.c b/migration/ram.c index 65b1223..8745ca3 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -352,6 +352,15 @@ static void precopy_notify(PrecopyNotifyReason reason) notifier_list_notify(&precopy_notifier_list, &reason); } =20 +void precopy_disable_bulk_stage(void) +{ + if (!ram_state) { + return; + } + + ram_state->ram_bulk_stage =3D false; +} + uint64_t ram_bytes_remaining(void) { return ram_state ? (ram_state->migration_dirty_pages * TARGET_PAGE_SIZ= E) : --=20 1.8.3.1