From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:42270) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Xib4X-0002Ah-4c for qemu-devel@nongnu.org; Sun, 26 Oct 2014 23:34:27 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Xib4Q-0004mH-Vu for qemu-devel@nongnu.org; Sun, 26 Oct 2014 23:34:21 -0400 Received: from mx1.redhat.com ([209.132.183.28]:56751) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Xib4Q-0004m6-Oa for qemu-devel@nongnu.org; Sun, 26 Oct 2014 23:34:14 -0400 Message-ID: <544DBD31.50906@redhat.com> Date: Mon, 27 Oct 2014 04:34:09 +0100 From: Michal Privoznik MIME-Version: 1.0 References: <544A0C29.5050506@huawei.com> In-Reply-To: <544A0C29.5050506@huawei.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] is qemu-2.1 support 1G hugepage List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Linhaifeng , qemu-devel@nongnu.org Cc: liuyongan@huawei.com, lilijun On 24.10.2014 10:22, Linhaifeng wrote: > Hi, > > I run qemu2.1 with 1G hugepage and found that VM can't start (too slowly?) but can start with 2M hugepage quickly. > > kernel version:3.10.0-123.6.3.el7.x86_64 > > command:qemu-kvm -name vm1 -enable-kvm -smp 2 -m 2048 -object memory-backend-file,id=mem,size=2048M,mem-path=/dev/hugepages,share=on -numa node,memdev=mem \ > -chardev socket,id=chr0,path=/path/socket -netdev type=vhost-user,id=net0,chardev=chr0 -device virtio-net-pci,netdev=net0,mac=00:00:00:00:00:01 > -drive file=/mnt/sdb/imgs/vm1.img -vnc :0 > What's the error message you're seeing? What's the filesystem mounted on /dev/hugepages? Moreover, 1GB hugepages can't be allocated at runtime currently, so do you allocate them on the host boot up process? Michal