From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp-out1.suse.de (smtp-out1.suse.de [195.135.223.130]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3B4C72837B for ; Thu, 12 Sep 2024 14:30:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=195.135.223.130 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726151422; cv=none; b=d+WU4kdmjNJAVMjhnSxNwpUkUWBqTRtM4esUHXk4ik+PxOnmlM4A4JUNiXagwiVSrLXi2sR0dgd3UPyF/UXKXTI36AG70wAwUA41/R5WtsSi4GzkFztBNxFEJgJ3Evi6euCwz5Lt4HVio3xrl1yyA0vOXo6rQq6kc//p48RgLhQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726151422; c=relaxed/simple; bh=UC3lMubzbPDpKJQjNX8t1MIoec/d268RF96jy3oWT+4=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=gbDmolY+A952QMuaF67GkWdqShqDg6clTI1spfqI5gOdcKICcob/jHv19i8rIxMR4DBENIBSdB4wUT0cpW6h+x/wr3ltOygdEcoX64meiA4SV2gEJEG/+4UPe7nP5wl6ebCFyIszkORhwoGpZ4JHsA7AXwwGICsxTtHpCn1iR7M= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=suse.cz; spf=pass smtp.mailfrom=suse.cz; arc=none smtp.client-ip=195.135.223.130 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=suse.cz Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=suse.cz Received: from imap1.dmz-prg2.suse.org (imap1.dmz-prg2.suse.org [IPv6:2a07:de40:b281:104:10:150:64:97]) (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-out1.suse.de (Postfix) with ESMTPS id A390221B09; Thu, 12 Sep 2024 14:30:19 +0000 (UTC) Authentication-Results: smtp-out1.suse.de; none Received: from imap1.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 imap1.dmz-prg2.suse.org (Postfix) with ESMTPS id 8344113AD8; Thu, 12 Sep 2024 14:30:19 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id Z+LBD/v64maDBQAAD6G6ig (envelope-from ); Thu, 12 Sep 2024 14:30:19 +0000 Date: Thu, 12 Sep 2024 16:29:13 +0200 From: Cyril Hrubis To: kernel test robot Cc: Chao Yu , lkp@intel.com, linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, oe-lkp@lists.linux.dev, Jaegeuk Kim , ltp@lists.linux.it Subject: Re: [LTP] [linus:master] [f2fs] 9f0f6bf427: ltp.ADSP069.fail Message-ID: References: <202409122103.e45aa13b-oliver.sang@intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <202409122103.e45aa13b-oliver.sang@intel.com> X-Rspamd-Pre-Result: action=no action; module=replies; Message is reply to one we originated X-Spam-Level: X-Spamd-Result: default: False [-4.00 / 50.00]; REPLY(-4.00)[] X-Spam-Score: -4.00 X-Spam-Flag: NO X-Rspamd-Queue-Id: A390221B09 X-Rspamd-Pre-Result: action=no action; module=replies; Message is reply to one we originated X-Rspamd-Action: no action X-Rspamd-Server: rspamd2.dmz-prg2.suse.org Hi! So what the test does is: - creates a sparse file (truncates an empty file to non-zero size) - starts N child processes that open the file and read it in chunks while they expect zeros to be read - starts a single writer child that opens the file with O_DIRECT and writes zeros to the file starting at some offset And if the test fails it means that at some point one of the reader children have seen inconsistent state. -- Cyril Hrubis chrubis@suse.cz