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, URIBL_BLOCKED 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 0F8BAC4338F for ; Tue, 17 Aug 2021 15:55:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E96D060FD9 for ; Tue, 17 Aug 2021 15:55:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240936AbhHQPzh (ORCPT ); Tue, 17 Aug 2021 11:55:37 -0400 Received: from out01.mta.xmission.com ([166.70.13.231]:45980 "EHLO out01.mta.xmission.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240280AbhHQPtC (ORCPT ); Tue, 17 Aug 2021 11:49:02 -0400 Received: from in01.mta.xmission.com ([166.70.13.51]:38074) by out01.mta.xmission.com with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.93) (envelope-from ) id 1mG1Js-00DpJe-Qv; Tue, 17 Aug 2021 09:48:04 -0600 Received: from ip68-227-160-95.om.om.cox.net ([68.227.160.95]:51836 helo=email.xmission.com) by in01.mta.xmission.com with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.93) (envelope-from ) id 1mG1Jq-008gTq-AD; Tue, 17 Aug 2021 09:48:04 -0600 From: ebiederm@xmission.com (Eric W. Biederman) To: "Ma\, XinjianX" Cc: "legion\@kernel.org" , "linux-kselftest\@vger.kernel.org" , lkp , "akpm\@linux-foundation.org" , "axboe\@kernel.dk" , "christian.brauner\@ubuntu.com" , "containers\@lists.linux-foundation.org" , "jannh\@google.com" , "keescook\@chromium.org" , "kernel-hardening\@lists.openwall.com" , "linux-kernel\@vger.kernel.org" , "linux-mm\@kvack.org" , "oleg\@redhat.com" , "torvalds\@linux-foundation.org" References: Date: Tue, 17 Aug 2021 10:47:14 -0500 In-Reply-To: (XinjianX Ma's message of "Tue, 17 Aug 2021 04:03:50 +0000") Message-ID: <87a6lgysxp.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=1mG1Jq-008gTq-AD;;;mid=<87a6lgysxp.fsf@disp2133>;;;hst=in01.mta.xmission.com;;;ip=68.227.160.95;;;frm=ebiederm@xmission.com;;;spf=neutral X-XM-AID: U2FsdGVkX1+YR/Sxbe0UH84qAcIuO7Yi3l0O0ew6ZBk= X-SA-Exim-Connect-IP: 68.227.160.95 X-SA-Exim-Mail-From: ebiederm@xmission.com Subject: Re: [PATCH v11 5/9] Reimplement RLIMIT_MSGQUEUE on top of ucounts X-SA-Exim-Version: 4.2.1 (built Sat, 08 Feb 2020 21:53:50 +0000) X-SA-Exim-Scanned: Yes (on in01.mta.xmission.com) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org "Ma, XinjianX" writes: > Hi Alexey, > > When lkp team run kernel selftests, we found after these series of patches, testcase mqueue: mq_perf_tests > in kselftest failed with following message. Which kernel was this run against? Where can the mq_perf_tests that you ran and had problems with be found? During your run were you using user namespaces as part of your test environment? The error message too many files corresponds to the error code EMFILES which is the error code that is returned when the rlimit is reached. One possibility is that your test environment was run in a user namespace and so you wound up limited by rlimit of the user who created the user namespace at the point of user namespace creation. At this point if you can give us enough information to look into this and attempt to reproduce it that would be appreciated. > If you confirm and fix the issue, kindly add following tag as appropriate > Reported-by: kernel test robot lkp@intel.com > > ``` > # selftests: mqueue: mq_perf_tests > # > # Initial system state: > # Using queue path: /mq_perf_tests > # RLIMIT_MSGQUEUE(soft): 819200 > # RLIMIT_MSGQUEUE(hard): 819200 > # Maximum Message Size: 8192 > # Maximum Queue Size: 10 > # Nice value: 0 > # > # Adjusted system state for testing: > # RLIMIT_MSGQUEUE(soft): (unlimited) > # RLIMIT_MSGQUEUE(hard): (unlimited) > # Maximum Message Size: 16777216 > # Maximum Queue Size: 65530 > # Nice value: -20 > # Continuous mode: (disabled) > # CPUs to pin: 3 > # ./mq_perf_tests: mq_open() at 296: Too many open files > not ok 2 selftests: mqueue: mq_perf_tests # exit=1 > ``` > > Test env: > rootfs: debian-10 > gcc version: 9 > > ------ > Thanks > Ma Xinjian Eric