From owner-freebsd-xen@freebsd.org Mon Jan 11 20:44:50 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 7FD42A6CA73 for ; Mon, 11 Jan 2016 20:44:50 +0000 (UTC) (envelope-from bounces+73574-0602-freebsd-xen=freebsd.org@sendgrid.net) Received: from o3.shared.sendgrid.net (o3.shared.sendgrid.net [208.117.48.85]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 47D3315F0 for ; Mon, 11 Jan 2016 20:44:50 +0000 (UTC) (envelope-from bounces+73574-0602-freebsd-xen=freebsd.org@sendgrid.net) DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=sendgrid.info; h=subject:to:references:cc:from:mime-version:in-reply-to:content-type:content-transfer-encoding; s=smtpapi; bh=qeVWWm4eDEhaxbiWvMJCT1zSljE=; b=qipSfSH8GeORZZpCcM b53V6oKzdzzQLM4TZVk9wsax6j+mZUm5GUEYA0PMNymts9JT/301RWjFRaXo36RH kmZiJWGtz1LRwFGtV4wKJxaaZREJNys7wKmOtr5eyEleTrkj6kumUv9sWe0oVOsK Voc7gOmiIfSuDpMwQBFV9feQk= Received: by filter0590p1mdw1.sendgrid.net with SMTP id filter0590p1mdw1.22689.5694143EF 2016-01-11 20:44:46.162580074 +0000 UTC Received: from mail.tarsnap.com (ec2-54-86-246-204.compute-1.amazonaws.com [54.86.246.204]) by ismtpd0004p1iad1.sendgrid.net (SG) with ESMTP id l46bC7-oSuqTFwR7aLuH2w for ; Mon, 11 Jan 2016 20:44:46.255 +0000 (UTC) Received: (qmail 19317 invoked from network); 11 Jan 2016 20:42:23 -0000 Received: from unknown (HELO clamshell.daemonology.net) (127.0.0.1) by ec2-107-20-205-189.compute-1.amazonaws.com with ESMTP; 11 Jan 2016 20:42:23 -0000 Received: (qmail 78914 invoked from network); 11 Jan 2016 20:43:48 -0000 Received: from unknown (HELO clamshell.daemonology.net) (127.0.0.1) by clamshell.daemonology.net with SMTP; 11 Jan 2016 20:43:48 -0000 Subject: Re: recent disk-related breakage To: =?UTF-8?Q?Roger_Pau_Monn=c3=a9?= , freebsd-xen@freebsd.org References: <56934B8F.8050503@freebsd.org> <5693501F.9060008@freebsd.org> <5693E739.5030103@FreeBSD.org> Cc: hps@freebsd.org, kib@freebsd.org From: Colin Percival Message-ID: <56941404.90805@freebsd.org> Date: Mon, 11 Jan 2016 12:43:48 -0800 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:38.0) Gecko/20100101 Thunderbird/38.4.0 MIME-Version: 1.0 In-Reply-To: <5693E739.5030103@FreeBSD.org> Content-Type: text/plain; charset=windows-1252 content-transfer-encoding: quoted-printable X-SG-EID: RUbAm5H8PjswBj/QH+sYVehaJogg3iBnZcyVi1bw/IzE0ZlDJDlSsm34HrBVp9cLkQtKebuEgasQ2L MrivY4ZwKKMps7OAi77ce1SgpgaJh6/2HJOxg8a/aAHvPmbokoJvRxprtSRZquXS5cU9w6INS0ngsK EsK/K+bJauwoiDisVVnGeq7YfvYfCEKOt8c8lM7RTHpJbOOiCzeE82BiyXtjhtCvzogNrtWgTM16GY g= 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 20:44:50 -0000 On 01/11/16 09:32, Roger Pau Monn=E9 wrote:=0D > El 11/01/16 a les 7.47, Colin Percival ha escrit:=0D >> I'm rather suspicious of r292255 here -- royger, hps, kib, can any of yo= u=0D >> comment on whether it would be responsible for making non-page-aligned I= /Os=0D >> no longer get split on page boundaries? The commit message is suggestiv= e,=0D >> but I don't know the code very well.=0D > =0D > This is caused by r291716=0D =0D Agreed. Sorry for pointing at the wrong busdma change.=0D =0D > which re-introduced the broken mechanism=0D > found in bus_dmamap_load_ma_triv. I've already notified ken about it,=0D > and I have a patch that should solve it by reverting to the usage of=0D > _bus_dmamap_load_ma in order to load an unmapped bio:=0D > =0D > https://lists.freebsd.org/pipermail/svn-src-all/2016-January/116629.html= =0D =0D Ken replied shortly after the Europe -> North America "shift change", so I= =0D took the liberty of committing this fix (after doing further testing myself= )=0D as r293698.=0D =0D Thank you!=0D =0D -- =0D Colin Percival=0D Security Officer Emeritus, FreeBSD | The power to serve=0D Founder, Tarsnap | www.tarsnap.com | Online backups for the truly paranoid