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=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 88BBCC11F67 for ; Tue, 29 Jun 2021 15:52:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5AFA761D72 for ; Tue, 29 Jun 2021 15:52:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234152AbhF2Pyf (ORCPT ); Tue, 29 Jun 2021 11:54:35 -0400 Received: from out02.mta.xmission.com ([166.70.13.232]:46354 "EHLO out02.mta.xmission.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232929AbhF2Pyd (ORCPT ); Tue, 29 Jun 2021 11:54:33 -0400 Received: from in02.mta.xmission.com ([166.70.13.52]) by out02.mta.xmission.com with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.93) (envelope-from ) id 1lyG1t-007HkF-AW; Tue, 29 Jun 2021 09:52:05 -0600 Received: from ip68-227-160-95.om.om.cox.net ([68.227.160.95]:59472 helo=email.xmission.com) by in02.mta.xmission.com with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.93) (envelope-from ) id 1lyG1s-001hct-9Q; Tue, 29 Jun 2021 09:52:04 -0600 From: ebiederm@xmission.com (Eric W. Biederman) To: Linus Torvalds Cc: Alexey Gladkov , Linux Kernel Mailing List , Linux Containers References: <87fsx1vcr9.fsf@disp2133> Date: Tue, 29 Jun 2021 10:51:57 -0500 In-Reply-To: (Linus Torvalds's message of "Mon, 28 Jun 2021 20:47:12 -0700") Message-ID: <87czs4u0rm.fsf@disp2133> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-XM-SPF: eid=1lyG1s-001hct-9Q;;;mid=<87czs4u0rm.fsf@disp2133>;;;hst=in02.mta.xmission.com;;;ip=68.227.160.95;;;frm=ebiederm@xmission.com;;;spf=neutral X-XM-AID: U2FsdGVkX1/CH09AIniFLWzy282KwTH+6uGeoCx45RM= X-SA-Exim-Connect-IP: 68.227.160.95 X-SA-Exim-Mail-From: ebiederm@xmission.com Subject: Re: [GIT PULL] ucounts: Count rlimits in each user namespace X-SA-Exim-Version: 4.2.1 (built Sat, 08 Feb 2020 21:53:50 +0000) X-SA-Exim-Scanned: Yes (on in02.mta.xmission.com) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Linus Torvalds writes: > Why the "sigpending < LONG_MAX" test in that > > if (override_rlimit || (sigpending < LONG_MAX && sigpending <= > task_rlimit(t, RLIMIT_SIGPENDING))) { > thing? On second look that sigpending < LONG_MAX check is necessary. When inc_rlimit_ucounts detects a problem it returns LONG_MAX. So the check for LONG_MAX is the condensed check to see if there is a problem in any other levels of the ucount hierarchy. Eric