From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: FW: cgroup blkio.weight working, but not for KVM guests Date: Thu, 25 Oct 2012 19:13:27 +0200 Message-ID: <50897337.30902@redhat.com> References: <022401cdac8d$32565fa0$97031ee0$@ncsu.edu> <014201cdb05a$414e7b20$c3eb7160$@ncsu.edu> <20121023123502.GF19977@stefanha-thinkpad.redhat.com> <046b01cdb170$7c2b7a10$74826e30$@ncsu.edu> <20121024061056.GA2904@stefanha-thinkpad.redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: Ben Clay , kvm@vger.kernel.org To: Stefan Hajnoczi Return-path: Received: from mx1.redhat.com ([209.132.183.28]:17212 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757204Ab2JYRNe (ORCPT ); Thu, 25 Oct 2012 13:13:34 -0400 In-Reply-To: <20121024061056.GA2904@stefanha-thinkpad.redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: On 10/24/2012 08:10 AM, Stefan Hajnoczi wrote: > 1. For aio=native QEMU uses the Linux AIO API. I think this results in > kernel threads that process I/O on behalf of the userspace process. No, the request is submitted directly from io_submit(), and completion sets the eventfd from irq context. Usually no threads are involved. -- error compiling committee.c: too many arguments to function