From patchwork Wed Oct 19 22:46:58 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Paul E. McKenney" X-Patchwork-Id: 13012451 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 73D1AC433FE for ; Wed, 19 Oct 2022 22:47:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230481AbiJSWrK (ORCPT ); Wed, 19 Oct 2022 18:47:10 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36168 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230368AbiJSWrF (ORCPT ); Wed, 19 Oct 2022 18:47:05 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0B1E6188107; Wed, 19 Oct 2022 15:47:04 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id B8D70B8261B; Wed, 19 Oct 2022 22:47:02 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 505A7C43148; Wed, 19 Oct 2022 22:47:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1666219621; bh=IeaAKnXCrTJxEtb/hM2Q5kn1ssJ75eQ9FsOhFMTira4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=s2eRhzIvlTeDSe1B8OI9k7XhSR+HrCnEujCmMR1fA0ltBZ3oeJzvsdkc2x8DaEYo6 vip4yyk3uBScrCJ2kpln3iH9pg39A/8gA4spvtnSP5RsmBB6WdCboK04Lo+doYVmeF sfAVQs7GcyBG7/mXI324vwx0aN7ztx59oUdwFoYECI7und9aTWpjb+OvBu6aLg3jsE kbe+8LCQ6WxrFfgnMEdnfL4tH3furhSuBLAWGjrb50IEm/wOYENRcCYoJkwr+qaFYl 0VWesc45R5xRXk47xsq/OWFN/sqiKo2xtO0cwWgpzeW77txeSnyUIr0DJZexx8qx4z jss+1AKGZ7jvg== Received: by paulmck-ThinkPad-P17-Gen-1.home (Postfix, from userid 1000) id B11CC5C0AC5; Wed, 19 Oct 2022 15:47:00 -0700 (PDT) From: "Paul E. McKenney" To: rcu@vger.kernel.org Cc: linux-kernel@vger.kernel.org, kernel-team@fb.com, rostedt@goodmis.org, "Paul E. McKenney" , Alexei Starovoitov Subject: [PATCH rcu 7/8] rcu-tasks: Make grace-period-age message human-readable Date: Wed, 19 Oct 2022 15:46:58 -0700 Message-Id: <20221019224659.2499511-7-paulmck@kernel.org> X-Mailer: git-send-email 2.31.1.189.g2e36527f23 In-Reply-To: <20221019224652.GA2499358@paulmck-ThinkPad-P17-Gen-1> References: <20221019224652.GA2499358@paulmck-ThinkPad-P17-Gen-1> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: rcu@vger.kernel.org This commit adds a few words to the informative message that appears every ten seconds in RCU Tasks and RCU Tasks Trace grace periods. This message currently reads as follows: rcu_tasks_wait_gp: rcu_tasks grace period 1046 is 10088 jiffies old. After this change, it provides additional context, instead reading as follows: rcu_tasks_wait_gp: rcu_tasks grace period number 1046 (since boot) is 10088 jiffies old. Reported-by: Alexei Starovoitov Signed-off-by: Paul E. McKenney --- kernel/rcu/tasks.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/rcu/tasks.h b/kernel/rcu/tasks.h index f5bf6fb430dab..b0b885e071fa8 100644 --- a/kernel/rcu/tasks.h +++ b/kernel/rcu/tasks.h @@ -728,7 +728,7 @@ static void rcu_tasks_wait_gp(struct rcu_tasks *rtp) if (rtsi > 0 && !reported && time_after(j, lastinfo + rtsi)) { lastinfo = j; rtsi = rtsi * rcu_task_stall_info_mult; - pr_info("%s: %s grace period %lu is %lu jiffies old.\n", + pr_info("%s: %s grace period number %lu (since boot) is %lu jiffies old.\n", __func__, rtp->kname, rtp->tasks_gp_seq, j - rtp->gp_start); } }