From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: [PATCH 10/12] kvm: enable smp > 1 Date: Wed, 19 May 2010 19:21:57 +0300 Message-ID: <4BF41025.9020107@redhat.com> References: <0af691d779965663abdd7bc708c2ad7bce2f6da0.1273699506.git.mtosatti@redhat.com> <659C91C0-E58A-43F6-A262-A15613E84FD3@suse.de> <4BED70B3.50202@redhat.com> <679AB14D-A9CC-437E-932F-AC13CAC26BA5@suse.de> <4BED7220.9060203@siemens.com> <4BF3B5F9.6020901@polarzone.de> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Cc: kvm@vger.kernel.org, qemu-devel@nongnu.org To: Udo Lembke Return-path: Received: from mx1.redhat.com ([209.132.183.28]:18845 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750943Ab0ESQWF (ORCPT ); Wed, 19 May 2010 12:22:05 -0400 In-Reply-To: <4BF3B5F9.6020901@polarzone.de> Sender: kvm-owner@vger.kernel.org List-ID: On 05/19/2010 12:57 PM, Udo Lembke wrote: > Jan Kiszka schrieb: >> ... >> --enable-io-thread? >> >> If you had it disabled, it would also answer my question if -smp works >> without problems without that feature. >> >> Jan >> > Hi, > i have a dumb question: what is the "--enable-io-thread"? Is this a > kvm-switch? It's a ./configure switch for upstream qemu (don't use with qemu-kvm yet). > My kvm 0.12.4 don't accept this switch. I'm know only "threads=n" as > smp-parameter and "aio=threads" as drive-parameter. > > Because i look for a solution for a better io-performance of > windows-guest with more than one cpu... Unrelated, what are your smp issues? -- Do not meddle in the internals of kernels, for they are subtle and quick to panic.