From owner-svn-src-all@FreeBSD.ORG Thu Mar 24 14:30:08 2011 Return-Path: Delivered-To: svn-src-all@FreeBSD.org Received: from [127.0.0.1] (freefall.freebsd.org [IPv6:2001:4f8:fff6::28]) by hub.freebsd.org (Postfix) with ESMTP id 41E2F106564A; Thu, 24 Mar 2011 14:30:08 +0000 (UTC) (envelope-from jkim@FreeBSD.org) From: Jung-uk Kim To: David Malone Date: Thu, 24 Mar 2011 10:29:46 -0400 User-Agent: KMail/1.6.2 References: <201103241358.aa30354@walton.maths.tcd.ie> In-Reply-To: <201103241358.aa30354@walton.maths.tcd.ie> MIME-Version: 1.0 Content-Disposition: inline Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: <201103241029.57358.jkim@FreeBSD.org> Cc: svn-src-head@FreeBSD.org, svn-src-all@FreeBSD.org, src-committers@FreeBSD.org, John Baldwin , Bruce Evans Subject: Re: svn commit: r219676 - head/sys/x86/x86 X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 24 Mar 2011 14:30:08 -0000 On Thursday 24 March 2011 09:58 am, David Malone wrote: > > No new ones. Just the old ones of updating the frequency and all > > related variables without races. > > Is something simple, line an atomic write, an option for this? I > guess we don't have 64-bit atomic writes on all platforms, but we > could support it on some platforms. If atomic 64-bit read/write is possible and it is absolutely necessary, it has to be set via machdep.foo_freq, not kern.timecounter.foo.frequency. Jung-uk Kim