Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755009Ab2FYJll (ORCPT ); Mon, 25 Jun 2012 05:41:41 -0400 Received: from mx1.redhat.com ([209.132.183.28]:30049 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752842Ab2FYJlX (ORCPT ); Mon, 25 Jun 2012 05:41:23 -0400 Message-ID: <4FE83235.2000406@redhat.com> Date: Mon, 25 Jun 2012 12:41:09 +0300 From: Avi Kivity User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:13.0) Gecko/20120605 Thunderbird/13.0 MIME-Version: 1.0 To: "Michael S. Tsirkin" CC: x86@kernel.org, kvm@vger.kernel.org, Ingo Molnar , "H. Peter Anvin" , Marcelo Tosatti , gleb@redhat.com, Linus Torvalds , linux-kernel@vger.kernel.org, Thomas Gleixner Subject: Re: [PATCHv9 0/8] kvm: eoi optimization support References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1387 Lines: 34 On 06/24/2012 07:24 PM, Michael S. Tsirkin wrote: > I'm looking at reducing the interrupt overhead for virtualized guests: > some workloads spend a large part of their time processing interrupts. > > On kvm, an EOI write from the guest causes an expensive exit to host; we > avoid this using shared memory. > > The patches work fine on my boxes. See individual patches > for perf tests. You need to patch qemu to whitelist the kvm feature. > qemu patch was sent separately. > > The patches are against Linus's master and apply to kvm.git > cleanly. The last patch in the series, supplying the host > part, also depends on the ISR optimization patch that I > have for convenience included in the series (patch 2), > I also included a documentation patch (patch 1) - it is > here since it clarifies patch 2. This revision does not yet address > Thomas's idea of reworking the APIC page handling. Changes to this > optimization would require reworking this last patch in the series. > > The rest of the patchset has not changed significantly since v2. Thanks, applied. -- error compiling committee.c: too many arguments to function -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/