From owner-svn-src-head@freebsd.org  Mon Oct 26 12:41:45 2015
Return-Path: <owner-svn-src-head@freebsd.org>
Delivered-To: svn-src-head@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 BCAEF8A04;
 Mon, 26 Oct 2015 12:41:45 +0000 (UTC)
 (envelope-from royger@gmail.com)
Received: from mail-wi0-x231.google.com (mail-wi0-x231.google.com
 [IPv6:2a00:1450:400c:c05::231])
 (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 4C388122F;
 Mon, 26 Oct 2015 12:41:45 +0000 (UTC)
 (envelope-from royger@gmail.com)
Received: by wicfx6 with SMTP id fx6so112097935wic.1;
 Mon, 26 Oct 2015 05:41:43 -0700 (PDT)
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=cDoh7xz9JJuWpvs4S7lJxsCRs7a63P32mxaEkH7pZfw=;
 b=VauydF5EqimX0GfEPX7HSDMN8HGUo/LKyfVJMDuLBw35YR7qZdomu45uC4jNfEzfAC
 NMe8c8C+hbtyXf5HK6h4Ll3q7gKj99uBS50rqoCscz0yLo+0e6azA/glAEHj1jEizbcj
 /b4Vn4geSpUUQ/CsGdkUh52KTFPwhbLJUNaO2KtM0bCwRv6ZSvQcpBS59LkMGAJXqzhG
 5k6sgdtR1pVhLj0Hs22MTr9jV56+2w1wfGKa82OTorqNrXMStbHVSh2tyH4l1p3YpKXi
 fN6pBKQP9RmgvzgmnwPxfQ+Hz52q9RMUJqsDKnCZtflZSnk8dYaqGAESRGW7d1v3leu5
 YbKA==
X-Received: by 10.194.79.9 with SMTP id f9mr16675794wjx.130.1445863303462;
 Mon, 26 Oct 2015 05:41:43 -0700 (PDT)
Received: from [192.168.1.130] (43.Red-88-12-33.staticIP.rima-tde.net.
 [88.12.33.43])
 by smtp.gmail.com with ESMTPSA id xt1sm38816959wjb.32.2015.10.26.05.41.42
 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128);
 Mon, 26 Oct 2015 05:41:42 -0700 (PDT)
Sender: =?UTF-8?Q?Roger_Pau_Monn=C3=A9?= <royger@gmail.com>
Subject: Re: svn commit: r289834 - head/sys/x86/x86
To: Adrian Chadd <adrian.chadd@gmail.com>
References: <201510231539.t9NFdxPe018130@repo.freebsd.org>
 <562A564D.9080703@citrix.com>
 <CAJ-Vmok2WnSe2DA6jf6eLsL=OGsUD2_1LgLFRJi3LAhYk5aMwA@mail.gmail.com>
Cc: =?UTF-8?Q?Roger_Pau_Monn=c3=a9?= <royger@freebsd.org>,
 "src-committers@freebsd.org" <src-committers@freebsd.org>,
 "svn-src-all@freebsd.org" <svn-src-all@freebsd.org>,
 "svn-src-head@freebsd.org" <svn-src-head@freebsd.org>
From: =?UTF-8?Q?Roger_Pau_Monn=c3=a9?= <royger@FreeBSD.org>
Message-ID: <562E1F8F.3010304@FreeBSD.org>
Date: Mon, 26 Oct 2015 13:41:51 +0100
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:38.0)
 Gecko/20100101 Thunderbird/38.3.0
MIME-Version: 1.0
In-Reply-To: <CAJ-Vmok2WnSe2DA6jf6eLsL=OGsUD2_1LgLFRJi3LAhYk5aMwA@mail.gmail.com>
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit
X-BeenThere: svn-src-head@freebsd.org
X-Mailman-Version: 2.1.20
Precedence: list
List-Id: SVN commit messages for the src tree for head/-current
 <svn-src-head.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/svn-src-head>,
 <mailto:svn-src-head-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-head/>
List-Post: <mailto:svn-src-head@freebsd.org>
List-Help: <mailto:svn-src-head-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/svn-src-head>,
 <mailto:svn-src-head-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 26 Oct 2015 12:41:45 -0000

El 26/10/15 a les 13.24, Adrian Chadd ha escrit:
> Hi,
> 
> I've started seeing panics on -head with ATA code doing a dmamap load
> -> panic. I'll test by reverting this patch and see what happens, but
> when it /does/ happen I can't get a crashdump, so debugging will be
> less easy.
> 
> Has anyone else seen this?

I've got another report regarding ATA page-faults from Oliver Pinter.
The crash he was seeing was caused by bus_dmamap_load_ccb, but the calls
to the specific dma functions where optimized away. Can you figure out
which bounce_* function causes this specifically?

Thanks, Roger.