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 1042BC53210 for ; Thu, 5 Jan 2023 15:38:35 +0000 (UTC) Received: from picard.linux.it (localhost [IPv6:::1]) by picard.linux.it (Postfix) with ESMTP id 9B37B3CB652 for ; Thu, 5 Jan 2023 16:38:33 +0100 (CET) Received: from in-6.smtp.seeweb.it (in-6.smtp.seeweb.it [IPv6:2001:4b78:1:20::6]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-384)) (No client certificate requested) by picard.linux.it (Postfix) with ESMTPS id 321303C84F2 for ; Thu, 5 Jan 2023 16:38:22 +0100 (CET) Received: from smtp-out2.suse.de (smtp-out2.suse.de [IPv6:2001:67c:2178:6::1d]) (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 EB7181400459 for ; Thu, 5 Jan 2023 16:38:20 +0100 (CET) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id 72A57247C5; Thu, 5 Jan 2023 15:38:15 +0000 (UTC) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id EF9B113338; Thu, 5 Jan 2023 15:38:14 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id ggJoMebutmNeLwAAMHmgww (envelope-from ); Thu, 05 Jan 2023 15:38:14 +0000 Date: Thu, 5 Jan 2023 16:38:06 +0100 From: Petr Vorel To: Martin Doucha Message-ID: References: <20230105134416.15853-1-mdoucha@suse.cz> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20230105134416.15853-1-mdoucha@suse.cz> Authentication-Results: smtp-out2.suse.de; none X-Spamd-Result: default: False [-3.30 / 50.00]; ARC_NA(0.00)[]; HAS_REPLYTO(0.30)[pvorel@suse.cz]; REPLYTO_EQ_FROM(0.00)[]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; TO_DN_SOME(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_GOOD(-0.10)[text/plain]; REPLY(-4.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; MID_RHS_NOT_FQDN(0.50)[]; RCVD_COUNT_TWO(0.00)[2]; RCVD_TLS_ALL(0.00)[] X-Virus-Scanned: clamav-milter 0.102.4 at in-6.smtp.seeweb.it X-Virus-Status: Clean Subject: Re: [LTP] [PATCH] ltp-aiodio.part4: Run DIT000 with only 1 reader process 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 Martin, > New changes in real-time kernel patchset give high priority to direct I/O > readers and may cause writes to block indefinitely if there are too many > reader processes running in parallel. Reduce the number of reader processes > in DIT000 to 1 which was the dio_truncate default before rewrite to new API. Correct, before 7a3741679d it was 1: -int main(void) +static void run(void) { - char filename[PATH_MAX]; - int pid[NUM_CHILDREN]; - int num_children = 1; + char *filename = "file"; + int filesize = FILE_SIZE; + int num_children = NUM_CHILDREN; > +++ b/runtest/ltp-aiodio.part4 > @@ -56,7 +56,7 @@ ADI007 dio_append > ADI008 dio_append > ADI009 dio_append > #Running dio_truncate > -DIT000 dio_truncate > +DIT000 dio_truncate -n 1 > DIT001 dio_truncate > DIT002 dio_truncate > #Running dio_read But I wonder why changing just the first dio_truncate will fix it (obviously not). Could we detect RT and force -n 1 for it? (utsname.version should have "PREEMPT RT"). Obviously only from version which got affected. Kind regards, Petr -- Mailing list info: https://lists.linux.it/listinfo/ltp