From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from list by lists.gnu.org with archive (Exim 4.71) id 1aMjDl-0007mc-QW for mharc-grub-devel@gnu.org; Fri, 22 Jan 2016 16:26:17 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:48200) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aMfle-0004re-PB for grub-devel@gnu.org; Fri, 22 Jan 2016 12:45:03 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aMfla-0000zY-07 for grub-devel@gnu.org; Fri, 22 Jan 2016 12:45:02 -0500 Received: from alva.zappa.cx ([88.131.107.253]:58195) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aMflZ-0000zM-Ky for grub-devel@gnu.org; Fri, 22 Jan 2016 12:44:57 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=zappa.cx; s=default; h=Content-Transfer-Encoding:Content-Type:In-Reply-To:MIME-Version:Date:Message-ID:From:Cc:References:To:Subject; bh=63MsoiyWEbW9P8LJIKwcraKi8OzLtYl0cX3F35lBJNc=; b=3HS5K8NO5WKIk361F2P/P8nANoJT7wzWZR1o7WJ5bOPCIxg18dBeIYunbAzEGl+R8SjlPct54nnYPWAOmyarqW12Vkdc2RMNLqjRkuj55GHAI65vqfDCYPuZgic3q3bc4UdNUhpAw4H6tWUGEbQUnKj0UTij2NI2cBA/uE+7V7E=; Received: from matrix.zappa.cx ([2001:16d8:ff9b:2:216:3eff:fe18:c6ed]) by alva.zappa.cx with esmtp (Exim 4.72) (envelope-from ) id 1aMflK-0000AT-2B; Fri, 22 Jan 2016 18:44:42 +0100 Received: from [IPv6:2001:16d8:ff9b:2:76d4:35ff:fe12:6c2c] (sunkan.zappa.cx [IPv6:2001:16d8:ff9b:2:76d4:35ff:fe12:6c2c] (may be forged)) by matrix.zappa.cx (8.14.4/8.14.4/Debian-8) with ESMTP id u0MHiYZw015987 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT); Fri, 22 Jan 2016 18:44:36 +0100 Subject: Re: [Xen-devel] [BUG] XEN domU crash when PV grub chainloads 32-bit domU grub To: "=?UTF-8?Q?Vladimir_'=cf=86-coder/phcoder'_Serbinenko?=" , Ian Campbell , grub-devel@gnu.org References: <5600628A.20202@zappa.cx> <1442912018.10338.118.camel@citrix.com> <56A226F8.3020301@gmail.com> From: Andreas Sundstrom Message-ID: <56A26A82.1070600@zappa.cx> Date: Fri, 22 Jan 2016 18:44:34 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Icedove/38.5.0 MIME-Version: 1.0 In-Reply-To: <56A226F8.3020301@gmail.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.11 (matrix.zappa.cx [IPv6:2001:16d8:ff9b:2:216:3eff:fe18:c6ed]); Fri, 22 Jan 2016 18:44:36 +0100 (CET) X-Scanned-By: MIMEDefang 2.75 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6.x X-Received-From: 88.131.107.253 X-Mailman-Approved-At: Fri, 22 Jan 2016 16:26:15 -0500 Cc: xen-devel@lists.xen.org X-BeenThere: grub-devel@gnu.org X-Mailman-Version: 2.1.14 Precedence: list Reply-To: The development of GNU GRUB List-Id: The development of GNU GRUB List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 22 Jan 2016 17:45:03 -0000 On 2016-01-22 13:56, Vladimir 'φ-coder/phcoder' Serbinenko wrote: > On 22.09.2015 10:53, Ian Campbell wrote: >> Hi Vladimir & grub-devel, >> >> Do you have any thoughts on this issue with i386 pv-grub2? >> > Is it still an issue? If so I'll try to replicate it. From stack dump I > see that it has jumped to NULL. GRUB has no threads so it's not a race > condition with itself but may be one with some Xen part. An altrnative > possibility is that grub forgets to flush cache at some point in boot > process. I can still reproduce the issue. I don't think much has changed in my setup since the report. I run the current version of Xen and GRUB from Debian stable. /Andreas