From: Avi Kivity Subject: Re: [PATCH RFC] kvm: enable irq injection from interrupt context Date: Thu, 16 Sep 2010 11:46:03 +0200 Message-ID: <4C91E75B.6010704@redhat.com> References: <20100915185417.GA3924@redhat.com> <20100916090256.GU3008@redhat.com> <20100916091054.GA20864@redhat.com> <20100916092553.GV3008@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: "Michael S. Tsirkin" , Marcelo Tosatti , kvm@vger.kernel.org, linux-kernel@vger.kernel.org To: Gleb Natapov Return-path: 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 In-Reply-To: <20100916092553.GV3008@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: 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