From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:51638) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VlKNt-0004TT-Fq for qemu-devel@nongnu.org; Tue, 26 Nov 2013 10:17:12 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1VlKNm-0005rP-4K for qemu-devel@nongnu.org; Tue, 26 Nov 2013 10:17:05 -0500 Received: from smtp.codeaurora.org ([198.145.11.231]:47164) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VlKNl-0005r5-Tx for qemu-devel@nongnu.org; Tue, 26 Nov 2013 10:16:58 -0500 Message-ID: <5294BB66.3060608@codeaurora.org> Date: Tue, 26 Nov 2013 10:16:54 -0500 From: Christopher Covington MIME-Version: 1.0 References: <5293718E.4090508@gentoo.org> <5293C622.4070304@gentoo.org> In-Reply-To: <5293C622.4070304@gentoo.org> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] QEMU dies on any attempt to load a Linux kernel module when using a 9P rootfs List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Richard Yao Cc: kernel@gentoo.org, v9fs-developer@lists.sourceforge.net, qemu-devel@nongnu.org, virtualization@lists.linux-foundation.org Hi Richard, On 11/25/2013 04:50 PM, Richard Yao wrote: > I figured out the problem. There is zerocopy IO is being done via DMA to > a buffer allocated with valloc(). Right now, I am running a hack-fix > locally so I can get some other stuff done first. I will propose a > proper fix to the list in a few days. I've also encountered this issue on a non-QEMU simulator and have been carrying a disable-zero-copy hack for a few months. Let me know if there's anything I can help with. Christopher -- Employee of Qualcomm Innovation Center, Inc. Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by the Linux Foundation.