From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755346AbZHDIrn (ORCPT ); Tue, 4 Aug 2009 04:47:43 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755295AbZHDIrn (ORCPT ); Tue, 4 Aug 2009 04:47:43 -0400 Received: from mx2.redhat.com ([66.187.237.31]:51373 "EHLO mx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755266AbZHDIrm (ORCPT ); Tue, 4 Aug 2009 04:47:42 -0400 Message-ID: <4A77F6EF.8010002@redhat.com> Date: Tue, 04 Aug 2009 11:53:03 +0300 From: Avi Kivity User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1b3pre) Gecko/20090513 Fedora/3.0-2.3.beta2.fc11 Lightning/1.0pre Thunderbird/3.0b2 MIME-Version: 1.0 To: "Michael S. Tsirkin" CC: davidel@xmailserver.org, gleb@redhat.com, kvm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH-RFC 2/2] eventfd: EFD_STATE flag References: <20090728175538.GC21549@redhat.com> <4A76FDB2.7080706@redhat.com> <20090803151426.GA3630@redhat.com> <4A770260.5000507@redhat.com> <20090803165708.GB3630@redhat.com> In-Reply-To: <20090803165708.GB3630@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 08/03/2009 07:57 PM, Michael S. Tsirkin wrote: >> Why not do it at the point of the write? >> >> if (value != ctx->count) { >> ctx->count = value; >> wake_things_up(); >> } >> > > What if write comes before read? > The read will get the new value. -- error compiling committee.c: too many arguments to function