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 Received: from picard.linux.it (picard.linux.it [213.254.12.146]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 886B5C47DDB for ; Mon, 29 Jan 2024 17:36:25 +0000 (UTC) Received: from picard.linux.it (localhost [IPv6:::1]) by picard.linux.it (Postfix) with ESMTP id D5BE93CF9BC for ; Mon, 29 Jan 2024 18:36:23 +0100 (CET) Received: from in-6.smtp.seeweb.it (in-6.smtp.seeweb.it [217.194.8.6]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (secp384r1) server-digest SHA384) (No client certificate requested) by picard.linux.it (Postfix) with ESMTPS id C52DB3CF9AE for ; Mon, 29 Jan 2024 18:36:08 +0100 (CET) Authentication-Results: in-6.smtp.seeweb.it; spf=pass (sender SPF authorized) smtp.mailfrom=suse.cz (client-ip=2a07:de40:b251:101:10:150:64:2; helo=smtp-out2.suse.de; envelope-from=pvorel@suse.cz; receiver=lists.linux.it) Received: from smtp-out2.suse.de (smtp-out2.suse.de [IPv6:2a07:de40:b251:101:10:150:64:2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by in-6.smtp.seeweb.it (Postfix) with ESMTPS id 20D6F1400E51 for ; Mon, 29 Jan 2024 18:36:07 +0100 (CET) Received: from imap2.dmz-prg2.suse.org (imap2.dmz-prg2.suse.org [IPv6:2a07:de40:b281:104:10:150:64:98]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id 44DDF1F7F8; Mon, 29 Jan 2024 17:36:07 +0000 (UTC) Received: from imap2.dmz-prg2.suse.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by imap2.dmz-prg2.suse.org (Postfix) with ESMTPS id DCD3A13911; Mon, 29 Jan 2024 17:36:06 +0000 (UTC) Received: from dovecot-director2.suse.de ([10.150.64.162]) by imap2.dmz-prg2.suse.org with ESMTPSA id BJf1MQbit2XZOAAAn2gu4w (envelope-from ); Mon, 29 Jan 2024 17:36:06 +0000 Date: Mon, 29 Jan 2024 18:36:04 +0100 From: Petr Vorel To: Andrea Cervesato Message-ID: <20240129173604.GA621069@pevik> References: <20240129101448.14463-1-andrea.cervesato@suse.de> <76d62bc7-ce36-45d6-8f8a-bb6602e3e27b@suse.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <76d62bc7-ce36-45d6-8f8a-bb6602e3e27b@suse.com> Authentication-Results: smtp-out2.suse.de; none X-Spamd-Result: default: False [-4.00 / 50.00]; REPLY(-4.00)[] X-Rspamd-Server: rspamd1.dmz-prg2.suse.org X-Rspamd-Queue-Id: 44DDF1F7F8 X-Virus-Scanned: clamav-milter 1.0.3 at in-6.smtp.seeweb.it X-Virus-Status: Clean Subject: Re: [LTP] [PATCH v1] Fix synchronization problem with dio tests X-BeenThere: ltp@lists.linux.it X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux Test Project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Petr Vorel Cc: ltp@lists.linux.it Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ltp-bounces+ltp=archiver.kernel.org@lists.linux.it Sender: "ltp" > Hi! > On 1/29/24 16:01, Cyril Hrubis wrote: > > Hi! > > > When system is really fast processing I/O syscalls, multiple childrean > > > running I/O operations might lock the parent, causing > > > tst_reap_childrean() to stuck. By adding a small usleep at the > > > end of the reading I/O operations, which are used by dio_append and > > > dio_read tests, we ensure that system has enough breath to end tests > > > correctly and to process children exit. > > This does smell like a kernel bug to be honest. > I thought the same at first, but I didn't find issues in the kernel. We can > take a look deeper for sure. > > Which test is this? How to reproduce? FYI It's ADI000 => dio_append (without params), which is failing on s39Ox on SLE 15-SP6. It runs pretty quickly on other common archs. Kind regards, Petr -- Mailing list info: https://lists.linux.it/listinfo/ltp