From owner-freebsd-xen@freebsd.org Mon Jan 11 17:32:46 2016 Return-Path: Delivered-To: freebsd-xen@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 3C0BDA65CBB for ; Mon, 11 Jan 2016 17:32:46 +0000 (UTC) (envelope-from royger@gmail.com) Received: from mail-wm0-x22d.google.com (mail-wm0-x22d.google.com [IPv6:2a00:1450:400c:c09::22d]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id CE5A81CDE; Mon, 11 Jan 2016 17:32:45 +0000 (UTC) (envelope-from royger@gmail.com) Received: by mail-wm0-x22d.google.com with SMTP id f206so221131019wmf.0; Mon, 11 Jan 2016 09:32:45 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=sender:subject:to:references:cc:from:message-id:date:user-agent :mime-version:in-reply-to:content-type:content-transfer-encoding; bh=FyR+9h0cr8lbA489PvxduCTXfGBBPUDWmjol78S4/Ss=; b=xmAX2tWEJAay2/Oe5OWbQ984mRAPuwGaMP3eQpcQQTTLoRReURZUDedVgHvY6aHXqf R6Ga4Ipg9la5yjW/Z7lGj0nBOr8u/OI4d+afBTQt7h0R+wcEnymiDrkvIiN8bCYGfH/P X7US+beY+hkGooIsJOvsZ6XVMlFDjJ1pElJ18xRRdWUqGX+De2nYtPQQzdgvn89rD69u x2aQwTNh/jTuOe5l1vN1GtMNqZhpHlY9qIi9IcoEQuZCVlTvJY7kM2fY7Z/4b2RvvDoJ UAozXcsDeH8GWx6Xz+tk5w2P8y9bdtX+VUDxRx4B3kGt11s+2IQTpMfp6UIoO4pchbM5 Z1aw== X-Received: by 10.194.175.170 with SMTP id cb10mr159394927wjc.36.1452533564373; Mon, 11 Jan 2016 09:32:44 -0800 (PST) Received: from [172.16.1.30] (178.Red-79-152-19.dynamicIP.rima-tde.net. [79.152.19.178]) by smtp.gmail.com with ESMTPSA id q75sm13812390wmd.6.2016.01.11.09.32.42 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 11 Jan 2016 09:32:43 -0800 (PST) Sender: =?UTF-8?Q?Roger_Pau_Monn=C3=A9?= Subject: Re: recent disk-related breakage To: Colin Percival , freebsd-xen@freebsd.org References: <56934B8F.8050503@freebsd.org> <5693501F.9060008@freebsd.org> Cc: hps@freebsd.org, kib@freebsd.org From: =?UTF-8?Q?Roger_Pau_Monn=c3=a9?= Message-ID: <5693E739.5030103@FreeBSD.org> Date: Mon, 11 Jan 2016 18:32:41 +0100 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:38.0) Gecko/20100101 Thunderbird/38.5.0 MIME-Version: 1.0 In-Reply-To: <5693501F.9060008@freebsd.org> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-xen@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Discussion of the freebsd port to xen - implementation and usage List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 11 Jan 2016 17:32:46 -0000 El 11/01/16 a les 7.47, Colin Percival ha escrit: > I'm rather suspicious of r292255 here -- royger, hps, kib, can any of you > comment on whether it would be responsible for making non-page-aligned I/Os > no longer get split on page boundaries? The commit message is suggestive, > but I don't know the code very well. Hello, This is caused by r291716, which re-introduced the broken mechanism found in bus_dmamap_load_ma_triv. I've already notified ken about it, and I have a patch that should solve it by reverting to the usage of _bus_dmamap_load_ma in order to load an unmapped bio: https://lists.freebsd.org/pipermail/svn-src-all/2016-January/116629.html Roger.