From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752834Ab0IPJqJ (ORCPT ); Thu, 16 Sep 2010 05:46:09 -0400 Received: from mx1.redhat.com ([209.132.183.28]:24314 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751818Ab0IPJqH (ORCPT ); Thu, 16 Sep 2010 05:46:07 -0400 Message-ID: <4C91E75B.6010704@redhat.com> Date: Thu, 16 Sep 2010 11:46:03 +0200 From: Avi Kivity User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.9) Gecko/20100907 Fedora/3.1.3-1.fc13 Lightning/1.0b3pre Thunderbird/3.1.3 MIME-Version: 1.0 To: Gleb Natapov CC: "Michael S. Tsirkin" , Marcelo Tosatti , kvm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH RFC] kvm: enable irq injection from interrupt context References: <20100915185417.GA3924@redhat.com> <20100916090256.GU3008@redhat.com> <20100916091054.GA20864@redhat.com> <20100916092553.GV3008@redhat.com> In-Reply-To: <20100916092553.GV3008@redhat.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 09/16/2010 11:25 AM, Gleb Natapov wrote: > > > > MSI only appeared in rhel6, older guests still use level interrupts. > So they are already slow for other reasons. > Exactly, for example they need to exit to userspace to ack the interrupt. That's far slower than the workqueue. -- error compiling committee.c: too many arguments to function