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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A6C04C001E0 for ; Thu, 13 Jul 2023 15:11:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233022AbjGMPLP (ORCPT ); Thu, 13 Jul 2023 11:11:15 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46096 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232955AbjGMPLO (ORCPT ); Thu, 13 Jul 2023 11:11:14 -0400 Received: from smtp-out1.suse.de (smtp-out1.suse.de [IPv6:2001:67c:2178:6::1c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 69825C1; Thu, 13 Jul 2023 08:11:12 -0700 (PDT) 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-out1.suse.de (Postfix) with ESMTPS id 2276322158; Thu, 13 Jul 2023 15:11:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_rsa; t=1689261071; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=wCLBmF2e2dRCNx7+d13fHc8+rkei0zsayK8x+eKdnGc=; b=qomcWisImhIgTGE3b4ZUEPF9NcyOW0hyDzZnyCPVzVgRuINKpG8MQbpCS13E9V1HBOrMO/ iAyUdkn6A+IJpPb5QvbPi4sRRNNjhjdXjokIMH8S4MUYkByXeu7CRlgjWvkVWDawXd8vHp 8AT5b9KhPS/AKO4mxgcaNhfFavUADcU= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_ed25519; t=1689261071; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=wCLBmF2e2dRCNx7+d13fHc8+rkei0zsayK8x+eKdnGc=; b=2D2YEL/BjKdkgcqnhmm74ZlNQAyBcVXYYRhOK4PSceT9B8FBt6yWbDy3bm5gYdZm5fpfJG MnQHKcIOISrEZ3Dw== 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 0AC70133D6; Thu, 13 Jul 2023 15:11:11 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id FtJUAg8UsGQOBwAAMHmgww (envelope-from ); Thu, 13 Jul 2023 15:11:11 +0000 Date: Thu, 13 Jul 2023 17:12:15 +0200 From: Cyril Hrubis To: kernel test robot Cc: Christoph Hellwig , "Darrick J. Wong" , Andreas Gruenbacher , Miklos Szeredi , Matthew Wilcox , cluster-devel@redhat.com, Ilya Dryomov , Miklos Szeredi , Chao Yu , linux-fsdevel@vger.kernel.org, Al Viro , Jaegeuk Kim , Xiubo Li , Trond Myklebust , ltp@lists.linux.it, lkp@intel.com, Jens Axboe , Christian Brauner , Theodore Ts'o , Johannes Thumshirn , linux-kernel@vger.kernel.org, linux-xfs@vger.kernel.org, Anna Schumaker , oe-lkp@lists.linux.dev, Andrew Morton , Hannes Reinecke Subject: Re: [LTP] [linus:master] [iomap] 219580eea1: ltp.writev07.fail Message-ID: References: <202307132107.2ce4ea2f-oliver.sang@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <202307132107.2ce4ea2f-oliver.sang@intel.com> Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Hi! The test description: Verify writev() behaviour with partially valid iovec list. Kernel <4.8 used to shorten write up to first bad invalid iovec. Starting with 4.8, a writev with short data (under page size) is likely to get shorten to 0 bytes and return EFAULT. This test doesn't make assumptions how much will write get shortened. It only tests that file content/offset after syscall corresponds to return value of writev(). See: [RFC] writev() semantics with invalid iovec in the middle https://marc.info/?l=linux-kernel&m=147388891614289&w=2 -- Cyril Hrubis chrubis@suse.cz