From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: linux-aio usable? Date: Tue, 09 Mar 2010 11:08:19 +0200 Message-ID: <4B961003.9010807@redhat.com> References: <4B94BF05.20609@redhat.com> <4B9559DA.8000407@msgid.tls.msk.ru> <4B955BD7.1010508@msgid.tls.msk.ru> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Bernhard Schmidt , kvm@vger.kernel.org To: Michael Tokarev Return-path: Received: from mx1.redhat.com ([209.132.183.28]:50376 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753618Ab0CIJIj (ORCPT ); Tue, 9 Mar 2010 04:08:39 -0500 In-Reply-To: <4B955BD7.1010508@msgid.tls.msk.ru> Sender: kvm-owner@vger.kernel.org List-ID: On 03/08/2010 10:19 PM, Michael Tokarev wrote: > Michael Tokarev wrote: > [] > >> Apparently that does not quite work. I just re-compiled kvm with >> --enable-linux-aio (actually I just installed libaio-dev on debian >> and qemu-kvm's configure picked it up automatically), and tried >> a guest. But any I/O fails. >> > It has nothing to do with kvm. It is compat_ioctl32 in the kernel > wrt aio calls. Historically I've a 64bit kernel with 32bit userland, > and tried 32bit kvm too, and that does not work. But 64bit kvm works > just fine with aio, and the performance numbers are indeed better. > > Can you elaborate? This sounds like a bug that wants to be fixed. -- error compiling committee.c: too many arguments to function