Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756050AbZFVSm1 (ORCPT ); Mon, 22 Jun 2009 14:42:27 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751622AbZFVSmS (ORCPT ); Mon, 22 Jun 2009 14:42:18 -0400 Received: from mx2.redhat.com ([66.187.237.31]:44950 "EHLO mx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751450AbZFVSmR (ORCPT ); Mon, 22 Jun 2009 14:42:17 -0400 Date: Mon, 22 Jun 2009 21:41:39 +0300 From: "Michael S. Tsirkin" To: Davide Libenzi Cc: Gregory Haskins , kvm@vger.kernel.org, Linux Kernel Mailing List , avi@redhat.com, paulmck@linux.vnet.ibm.com, Ingo Molnar , Rusty Russell Subject: Re: [PATCH 3/3] eventfd: add internal reference counting to fix notifier race conditions Message-ID: <20090622184139.GG15228@redhat.com> References: <4A3D895C.7020605@novell.com> <4A3E7E63.1070407@novell.com> <4A3FABD9.7080108@novell.com> <4A3FC2B1.4050107@novell.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.19 (2009-01-05) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 622 Lines: 13 On Mon, Jun 22, 2009 at 11:03:22AM -0700, Davide Libenzi wrote: > In your case of kernel-to-kernel scenario, why would you need eventfd at > all, if userspace role in that model is simply to create it? That's not 100% true. We have a mode where userspace is the producer and/or consumer (migration mode) and we switch between that and direct kernel-to-kernel communication. -- 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/