From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-11.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6F8CEC3A5A1 for ; Wed, 28 Aug 2019 10:17:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4D5F3217F5 for ; Wed, 28 Aug 2019 10:17:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727373AbfH1KRq (ORCPT ); Wed, 28 Aug 2019 06:17:46 -0400 Received: from Galois.linutronix.de ([193.142.43.55]:46446 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726866AbfH1KQj (ORCPT ); Wed, 28 Aug 2019 06:16:39 -0400 Received: from [5.158.153.53] (helo=tip-bot2.lab.linutronix.de) by Galois.linutronix.de with esmtpsa (TLS1.2:DHE_RSA_AES_256_CBC_SHA256:256) (Exim 4.80) (envelope-from ) id 1i2v0G-0000LP-IJ; Wed, 28 Aug 2019 12:16:36 +0200 Received: from [127.0.1.1] (localhost [IPv6:::1]) by tip-bot2.lab.linutronix.de (Postfix) with ESMTP id 99A2A1C0DE3; Wed, 28 Aug 2019 12:16:32 +0200 (CEST) Date: Wed, 28 Aug 2019 10:16:32 -0000 From: "tip-bot2 for Thomas Gleixner" Reply-to: linux-kernel@vger.kernel.org To: linux-tip-commits@vger.kernel.org Subject: [tip: timers/core] posix-cpu-timers: Respect INFINITY for hard RTTIME limit Cc: Thomas Gleixner , Frederic Weisbecker , Ingo Molnar , Borislav Petkov , linux-kernel@vger.kernel.org In-Reply-To: <20190821192922.078293002@linutronix.de> References: <20190821192922.078293002@linutronix.de> MIME-Version: 1.0 Message-ID: <156698739240.5777.15500414280182979993.tip-bot2@tip-bot2> X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The following commit has been merged into the timers/core branch of tip: Commit-ID: fe0517f893d36636de20d0a809fc0c788ca0cade Gitweb: https://git.kernel.org/tip/fe0517f893d36636de20d0a809fc0c788ca0cade Author: Thomas Gleixner AuthorDate: Wed, 21 Aug 2019 21:09:17 +02:00 Committer: Thomas Gleixner CommitterDate: Wed, 28 Aug 2019 11:50:39 +02:00 posix-cpu-timers: Respect INFINITY for hard RTTIME limit The RTIME limit expiry code does not check the hard RTTIME limit for INFINITY, i.e. being disabled. Add it. While this could be considered an ABI breakage if something would depend on this behaviour. Though it's highly unlikely to have an effect because RLIM_INFINITY is at minimum INT_MAX and the RTTIME limit is in seconds, so the timer would fire after ~68 years. Adding this obvious correct limit check also allows further consolidation of that code and is a prerequisite for cleaning up the 0 based checks and the rlimit setter code. Signed-off-by: Thomas Gleixner Reviewed-by: Frederic Weisbecker Link: https://lkml.kernel.org/r/20190821192922.078293002@linutronix.de --- kernel/time/posix-cpu-timers.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/time/posix-cpu-timers.c b/kernel/time/posix-cpu-timers.c index e62139a..a738d76 100644 --- a/kernel/time/posix-cpu-timers.c +++ b/kernel/time/posix-cpu-timers.c @@ -921,7 +921,7 @@ static void check_process_timers(struct task_struct *tsk, unsigned long hard = task_rlimit_max(tsk, RLIMIT_CPU); unsigned long psecs = div_u64(ptime, NSEC_PER_SEC); - if (psecs >= hard) { + if (hard != RLIM_INFINITY && psecs >= hard) { /* * At the hard limit, we just die. * No need to calculate anything else now.