From patchwork Thu Jun 17 14:12:06 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Hyman Huang X-Patchwork-Id: 1493531 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 4G5P8n3FzVz9sWM for ; Fri, 18 Jun 2021 00:10:33 +1000 (AEST) Received: from localhost ([::1]:36254 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ltsj0-0006P5-Co for incoming@patchwork.ozlabs.org; Thu, 17 Jun 2021 10:10:31 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:59674) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ltsgw-0001BQ-1R for qemu-devel@nongnu.org; Thu, 17 Jun 2021 10:08:22 -0400 Received: from prt-mail.chinatelecom.cn ([42.123.76.223]:51748 helo=chinatelecom.cn) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ltsgs-0002lO-OV for qemu-devel@nongnu.org; Thu, 17 Jun 2021 10:08:21 -0400 HMM_SOURCE_IP: 172.18.0.48:48630.1962201350 HMM_ATTACHE_NUM: 0000 HMM_SOURCE_TYPE: SMTP Received: from clientip-202.80.192.38?logid-05d08ad9f51a4d9e834e1f4ae90155af (unknown [172.18.0.48]) by chinatelecom.cn (HERMES) with SMTP id 71F5B280029; Thu, 17 Jun 2021 22:08:18 +0800 (CST) X-189-SAVE-TO-SEND: +huangy81@chinatelecom.cn Received: from ([172.18.0.48]) by app0024 with ESMTP id e6a9d3b608ec43adb2d29b53d93591ea for qemu-devel@nongnu.org; Thu Jun 17 22:08:17 2021 X-Transaction-ID: e6a9d3b608ec43adb2d29b53d93591ea X-filter-score: filter<0> X-Real-From: huangy81@chinatelecom.cn X-Receive-IP: 172.18.0.48 X-MEDUSA-Status: 0 From: huangy81@chinatelecom.cn To: qemu-devel@nongnu.org Subject: [PATCH v7 5/7] migration/dirtyrate: adjust order of registering thread Date: Thu, 17 Jun 2021 22:12:06 +0800 Message-Id: <24a3d6e1546e6620ede9b6225b6c5cb605f67fc1.1623938622.git.huangy81@chinatelecom.cn> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: References: In-Reply-To: References: MIME-Version: 1.0 Received-SPF: pass client-ip=42.123.76.223; envelope-from=huangy81@chinatelecom.cn; helo=chinatelecom.cn X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Eduardo Habkost , Juan Quintela , Hyman , "Dr. David Alan Gilbert" , Peter Xu , Chuan Zheng , Paolo Bonzini Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" From: Hyman Huang(黄勇) registering get_dirtyrate thread in advance so that both page-sampling and dirty-ring mode can be covered. Signed-off-by: Hyman Huang(黄勇) --- migration/dirtyrate.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/migration/dirtyrate.c b/migration/dirtyrate.c index e0a27a9..a9bdd60 100644 --- a/migration/dirtyrate.c +++ b/migration/dirtyrate.c @@ -352,7 +352,6 @@ static void calculate_dirtyrate(struct DirtyRateConfig config) int64_t msec = 0; int64_t initial_time; - rcu_register_thread(); rcu_read_lock(); initial_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); if (!record_ramblock_hash_info(&block_dinfo, config, &block_count)) { @@ -375,7 +374,6 @@ static void calculate_dirtyrate(struct DirtyRateConfig config) out: rcu_read_unlock(); free_ramblock_dirty_info(block_dinfo, block_count); - rcu_unregister_thread(); } void *get_dirtyrate_thread(void *arg) @@ -383,6 +381,7 @@ void *get_dirtyrate_thread(void *arg) struct DirtyRateConfig config = *(struct DirtyRateConfig *)arg; int ret; int64_t start_time; + rcu_register_thread(); ret = dirtyrate_set_state(&CalculatingState, DIRTY_RATE_STATUS_UNSTARTED, DIRTY_RATE_STATUS_MEASURING); @@ -401,6 +400,8 @@ void *get_dirtyrate_thread(void *arg) if (ret == -1) { error_report("change dirtyrate state failed."); } + + rcu_unregister_thread(); return NULL; }