From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sam Subject: Will huge page have negative effect on guest vm in qemu enviroment? Date: Wed, 21 Jun 2017 11:32:45 +0800 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" To: dev@dpdk.org, users@dpdk.org, qemu-devel@nongnu.org, qemu-discuss@nongnu.org Return-path: List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Hi all, We plan to use DPDK on HP host machine with several core and big memory. We plan to use qemu-kvm enviroment. The host will carry 4 or more guest vm and 1 ovs. Ovs-dpdk is much faster then normal ovs, but to use ovs-dpdk, we have to enable huge page globally. My question is, will huge page enabled globally have negative effect on guest vm's memory orperate or something? If it is, how to prevent this, or could I enable huge page on some core or enable huge page for a part of memory? Thank you~ From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:41117) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dNWNs-00011x-Ow for qemu-devel@nongnu.org; Tue, 20 Jun 2017 23:32:49 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dNWNs-0000WY-1r for qemu-devel@nongnu.org; Tue, 20 Jun 2017 23:32:48 -0400 MIME-Version: 1.0 From: Sam Date: Wed, 21 Jun 2017 11:32:45 +0800 Message-ID: Content-Type: text/plain; charset="UTF-8" Subject: [Qemu-devel] Will huge page have negative effect on guest vm in qemu enviroment? List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: dev@dpdk.org, users@dpdk.org, qemu-devel@nongnu.org, qemu-discuss@nongnu.org Hi all, We plan to use DPDK on HP host machine with several core and big memory. We plan to use qemu-kvm enviroment. The host will carry 4 or more guest vm and 1 ovs. Ovs-dpdk is much faster then normal ovs, but to use ovs-dpdk, we have to enable huge page globally. My question is, will huge page enabled globally have negative effect on guest vm's memory orperate or something? If it is, how to prevent this, or could I enable huge page on some core or enable huge page for a part of memory? Thank you~