Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932376AbWHQV6l (ORCPT ); Thu, 17 Aug 2006 17:58:41 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932468AbWHQV6l (ORCPT ); Thu, 17 Aug 2006 17:58:41 -0400 Received: from e1.ny.us.ibm.com ([32.97.182.141]:2473 "EHLO e1.ny.us.ibm.com") by vger.kernel.org with ESMTP id S932376AbWHQV6k (ORCPT ); Thu, 17 Aug 2006 17:58:40 -0400 Subject: Re: Linux time code From: john stultz To: Roman Zippel Cc: Ulrich Windl , linux-kernel@vger.kernel.org, Udo van den Heuvel In-Reply-To: References: <44E32B23.16949.BBB1EC4@Ulrich.Windl.rkdvmks1.ngate.uni-regensburg.de> <1155758034.5513.69.camel@localhost.localdomain> Content-Type: text/plain Date: Thu, 17 Aug 2006 14:58:37 -0700 Message-Id: <1155851917.31755.125.camel@cog.beaverton.ibm.com> Mime-Version: 1.0 X-Mailer: Evolution 2.2.3 (2.2.3-4.fc4) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1116 Lines: 28 On Thu, 2006-08-17 at 13:43 +0200, Roman Zippel wrote: > On Wed, 16 Aug 2006, john stultz wrote: > > > For example there is a POSIX-like sys_clock_gettime() intended to > > > server the end-user directly, but there's no counterpart do_clock_gettime() to > > > server any in-kernel needs. > > > > Hmmm.. ktime_get(), ktime_get_ts() and ktime_get_real(), provide this > > info. Is there something missing here? > > What is missing is the abiltity to map a clock to a posix clock, so that > you would have CLOCK_REALTIME/CLOCK_MONOTONIC as NTP controlled clocks and > other CLOCK_* as the raw clock. Is there a use case for this (wanting non-NTP corrected time on a system running NTPd) you have in mind? I'm not strictly opposed to this idea, but since it exposes a new interface to userland it needs to be carefully thought out and well understood. thanks -john - 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/