From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754356Ab2GYKE2 (ORCPT ); Wed, 25 Jul 2012 06:04:28 -0400 Received: from mail.sf-mail.de ([62.27.20.61]:39702 "EHLO mail.sf-mail.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752619Ab2GYKE0 (ORCPT ); Wed, 25 Jul 2012 06:04:26 -0400 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Date: Wed, 25 Jul 2012 12:04:33 +0200 From: Rolf Eike Beer To: Wang Sen Cc: , , , , , Subject: Re: [PATCH] scsi: virtio-scsi: Fix address translation failure of HighMem pages used by sg list In-Reply-To: <1343204966-23560-1-git-send-email-senwang@linux.vnet.ibm.com> References: <1343204966-23560-1-git-send-email-senwang@linux.vnet.ibm.com> Message-ID: User-Agent: Roundcube Webmail/0.7.2 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Am 25.07.2012 10:29, schrieb Wang Sen: > When using the commands below to write some data to a virtio-scsi LUN > of the > QEMU guest(32-bit) with 1G physical memory(qemu -m 1024), the qemu > will crash. > > # sudo mkfs.ext4 /dev/sdb (/dev/sdb is the virtio-scsi LUN.) > # sudo mount /dev/sdb /mnt > # dd if=/dev/zero of=/mnt/file bs=1M count=1024 > > In current implementation, sg_set_buf is called to add buffers to sg > list which > is put into the virtqueue eventually. The next sentence is somehow broken: > But there are some HighMem pages in > table->sgl can not get virtual address by sg_virt. Maybe something like "But _if_ there are ... _you_ can not get ..."? Eike