From patchwork Wed Oct 21 16:37:43 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lan Tianyu X-Patchwork-Id: 533942 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id C39911402C2 for ; Thu, 22 Oct 2015 03:51:48 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756135AbbJUQt7 (ORCPT ); Wed, 21 Oct 2015 12:49:59 -0400 Received: from mga09.intel.com ([134.134.136.24]:2216 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755829AbbJUQt5 (ORCPT ); Wed, 21 Oct 2015 12:49:57 -0400 Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga102.jf.intel.com with ESMTP; 21 Oct 2015 09:49:56 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.17,712,1437462000"; d="scan'208";a="816283127" Received: from lantianyu-ws.sh.intel.com (HELO localhost) ([10.239.159.159]) by fmsmga001.fm.intel.com with ESMTP; 21 Oct 2015 09:49:53 -0700 From: Lan Tianyu To: bhelgaas@google.com, carolyn.wyborny@intel.com, donald.c.skidmore@intel.com, eddie.dong@intel.com, nrupal.jani@intel.com, yang.z.zhang@intel.com, agraf@suse.de, kvm@vger.kernel.org, pbonzini@redhat.com, qemu-devel@nongnu.org, emil.s.tantilov@intel.com, intel-wired-lan@lists.osuosl.org, jeffrey.t.kirsher@intel.com, jesse.brandeburg@intel.com, john.ronciak@intel.com, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, matthew.vick@intel.com, mitch.a.williams@intel.com, netdev@vger.kernel.org, shannon.nelson@intel.com Cc: Lan Tianyu Subject: [RFC Patch 11/12] IXGBEVF: Migrate VF statistic data Date: Thu, 22 Oct 2015 00:37:43 +0800 Message-Id: <1445445464-5056-12-git-send-email-tianyu.lan@intel.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1445445464-5056-1-git-send-email-tianyu.lan@intel.com> References: <1445445464-5056-1-git-send-email-tianyu.lan@intel.com> Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org VF statistic regs are read-only and can't be migrated via writing back directly. Currently, statistic data returned to user space by the driver is not equal to value of statistic regs. VF driver records value of statistic regs as base data when net interface is up or open, calculate increased count of regs during last period of online service and added it to saved_reset data. When user space collects statistic data, VF driver returns result of "current - base + saved_reset". "Current" is reg value at that point. Restoring net function after migration just likes net interface is up or open. Call existed function to update base and saved_reset data to keep statistic data continual during migration. Signed-off-by: Lan Tianyu --- drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c index 04b6ce7..d22160f 100644 --- a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c +++ b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c @@ -3005,6 +3005,7 @@ int ixgbevf_live_mg(struct ixgbevf_adapter *adapter) return 0; del_timer_sync(&adapter->service_timer); + ixgbevf_update_stats(adapter); pr_info("migration start\n"); migration_status = MIGRATION_IN_PROGRESS; @@ -3017,6 +3018,8 @@ int ixgbevf_live_mg(struct ixgbevf_adapter *adapter) return 1; ixgbevf_restore_state(adapter); + ixgbevf_save_reset_stats(adapter); + ixgbevf_init_last_counter_stats(adapter); migration_status = MIGRATION_COMPLETED; pr_info("migration end\n"); return 0;