Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755226AbaJUKMd (ORCPT ); Tue, 21 Oct 2014 06:12:33 -0400 Received: from mail-by2on0133.outbound.protection.outlook.com ([207.46.100.133]:44832 "EHLO na01-by2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752412AbaJUKMc convert rfc822-to-8bit (ORCPT ); Tue, 21 Oct 2014 06:12:32 -0400 From: Thomas Shao To: Richard Cochran , Jeff Epler CC: Thomas Gleixner , "gregkh@linuxfoundation.org" , LKML , "devel@linuxdriverproject.org" , "olaf@aepfle.de" , "apw@canonical.com" , "jasowang@redhat.com" , KY Srinivasan , John Stultz , Richard Cochran Subject: RE: [PATCH v2 1/2] timekeeping: add EXPORT_SYMBOL_GPL for do_adjtimex() Thread-Topic: [PATCH v2 1/2] timekeeping: add EXPORT_SYMBOL_GPL for do_adjtimex() Thread-Index: AQHP6EpL5oa00nhAzECMXNpwI49m+pw5VpSAgAADkACAAIUwkIAAF66AgABISwCAABt+4A== Date: Tue, 21 Oct 2014 10:11:36 +0000 Message-ID: References: <1413362372-16236-1-git-send-email-huishao@microsoft.com> <20141021040212.GA6278@unpythonic.net> <20141021082058.GB6808@netboy> In-Reply-To: <20141021082058.GB6808@netboy> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.94.22.158] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 8BIT MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-Forefront-Antispam-Report: CIP:131.107.125.37;CTRY:US;IPV:CAL;IPV:NLI;IPV:NLI;EFV:NLI;SFV:NSPM;SFS:(10019020)(6009001)(438002)(24454002)(377454003)(13464003)(189002)(199003)(164054003)(51704005)(16796002)(76176999)(106466001)(55846006)(23726002)(31966008)(50986999)(86612001)(86362001)(92726001)(92566001)(50466002)(54356999)(46406003)(47776003)(81156004)(77096002)(99396003)(95666004)(64706001)(85306004)(20776003)(93886004)(33656002)(80022003)(2656002)(15202345003)(46102003)(86146001)(87936001)(4396001)(97736003)(69596002)(26826002)(76482002)(15975445006)(68736004)(120916001)(97756001)(19580395003)(106116001)(107046002)(6806004)(84676001)(44976005)(19580405001)(85852003)(21056001);DIR:OUT;SFP:1102;SCL:1;SRVR:BY1PR0301MB1207;H:mail.microsoft.com;FPR:;MLV:ovrnspm;PTR:InfoDomainNonexistent;MX:1;A:1;LANG:en; X-Microsoft-Antispam: UriScan:;UriScan:; X-Microsoft-Antispam: BCL:0;PCL:0;RULEID:;SRVR:BY1PR0301MB1207; X-O365ENT-EOP-Header: Message processed by - O365_ENT: Allow from ranges (Engineering ONLY) X-Forefront-PRVS: 0371762FE7 Authentication-Results: spf=pass (sender IP is 131.107.125.37) smtp.mailfrom=huishao@microsoft.com; X-Microsoft-Antispam: BCL:0;PCL:0;RULEID:;SRVR:BY1PR0301MB1173; X-OriginatorOrg: microsoft.onmicrosoft.com Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > -----Original Message----- > From: linux-kernel-owner@vger.kernel.org [mailto:linux-kernel- > owner@vger.kernel.org] On Behalf Of Richard Cochran > Sent: Tuesday, October 21, 2014 4:21 PM > To: Jeff Epler > Cc: Thomas Shao; Thomas Gleixner; gregkh@linuxfoundation.org; LKML; > devel@linuxdriverproject.org; olaf@aepfle.de; apw@canonical.com; > jasowang@redhat.com; KY Srinivasan; John Stultz; Richard Cochran > Subject: Re: [PATCH v2 1/2] timekeeping: add EXPORT_SYMBOL_GPL for > do_adjtimex() > > On Mon, Oct 20, 2014 at 11:02:13PM -0500, Jeff Epler wrote: > > It's interesting to imagine that a virtualization host could present a > > time service to the guest *userspace*, even when the guest is not > > otherwise exposed to the internet at large. This could take the form > > of an NTP server on a private network, or as an implementation of a > > time source directly usable by ntpd in the guest, for instance as an > > emulated serial port with synthetic NEMA GPS signal + PPS signal, for > instance. > > If the idea is to avoid bothering the guest user space, in order to be > convenient, then the host can provide a synthetic PPS, to be used by the > kernel's hardpps logic. > This is something I should consider. I'll do more investigation for this. Thanks Richard. > Thanks, > Richard > -- > 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/ -- 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/