Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750747AbWAUAAa (ORCPT ); Fri, 20 Jan 2006 19:00:30 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750783AbWAUAAa (ORCPT ); Fri, 20 Jan 2006 19:00:30 -0500 Received: from e34.co.us.ibm.com ([32.97.110.152]:22697 "EHLO e34.co.us.ibm.com") by vger.kernel.org with ESMTP id S1750747AbWAUAA3 (ORCPT ); Fri, 20 Jan 2006 19:00:29 -0500 Subject: [PATCHSET] Time: Generic Timeofday Subsystem (v B17) From: john stultz To: lkml Cc: Steven Rostedt , Thomas Gleixner , Ulrich Windl , Roman Zippel , George Anzinger , Ingo Molnar Content-Type: text/plain Date: Fri, 20 Jan 2006 16:00:26 -0800 Message-Id: <1137801626.27699.279.camel@cog.beaverton.ibm.com> Mime-Version: 1.0 X-Mailer: Evolution 2.2.3 (2.2.3-2.fc4) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2427 Lines: 60 All, Yes, B17 already. I didn't bother to announce the B16 release, since it was just a sync w/ the patches included into -mm. This announcement is mainly for upstream users of my patch (-kthrt and -rt trees), or anyone who wants to play with the patches outside of -mm. Anyway here it is: This patchset provides a generic timekeeping subsystem that is independent of the timer interrupt. This allows for robust and correct behavior in cases of late or lost ticks, avoids interpolation errors, reduces duplication in arch specific code, and allows or assists future changes such as high-res timers, dynamic ticks, or realtime preemption. Additionally, it provides finer nanosecond resolution values to the clock_gettime functions. The patch set provides the minimal NTP changes, the clocksource abstraction, the core timekeeping code as well as the code to convert i386. I have started on converting more arches, but for now I'm focusing on code for i386 and x86-64. Changes since the B16 release: o Avoids clocksource churn o Blacklist silent cpufreq changing thinkpad o Sync up w/ patches in 2.6.16-rc1-mm2 Outstanding issues: o TSC cpufreq caused stalls at bootup (working on this one) Still on my TODO list: o Squish any bugs that pop up from testing in -mm and -rt o Finer grained ntp adjustment accounting (Suggested by Roman) o A few spots could use some optimization (Again, suggested by Roman) o Clean and split up x86-64 patch o powerpc/ppc, s390, arm, ia64, alpha, sparc, sparc64 work The patchset applies against the current 2.6.16-rc1-git. The complete patchset can be found here: http://sr71.net/~jstultz/tod/ I'd like to thank the following people who have contributed ideas, criticism, testing and code that has helped shape this work: George Anzinger, Nish Aravamudan, Max Asbock, Serge Belyshev, Dominik Brodowski, Thomas Gleixner, Darren Hart, Christoph Lameter, Matt Mackal, Keith Mannthey, Ingo Molnar, Martin Schwidefsky, Frank Sorenson, Ulrich Windl, Jonathan Woithe, Darrick Wong, Roman Zippel and any others whom I've accidentally left off this list. As always, feedback, suggestions and bug-reports are always appreciated. 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/