From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752617AbcGMNEe (ORCPT ); Wed, 13 Jul 2016 09:04:34 -0400 Received: from mail-wm0-f68.google.com ([74.125.82.68]:35998 "EHLO mail-wm0-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751426AbcGMNEX (ORCPT ); Wed, 13 Jul 2016 09:04:23 -0400 From: Nicolai Stange To: Thomas Gleixner Cc: Ingo Molnar , "H. Peter Anvin" , x86@kernel.org, Borislav Petkov , Paolo Bonzini , Viresh Kumar , Hidehiro Kawai , "Peter Zijlstra (Intel)" , Len Brown , "Christopher S. Hall" , Adrian Hunter , linux-kernel@vger.kernel.org, Nicolai Stange Subject: [PATCH v3 0/3] reduce TSC deadline frequency errors Date: Wed, 13 Jul 2016 15:03:41 +0200 Message-Id: <20160713130344.8319-1-nicstange@gmail.com> X-Mailer: git-send-email 2.9.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This series is a split-off of the x86/TSC related patches from the "avoid double timer interrupt with nohz and Intel TSC" v2 series (http://lkml.kernel.org/g/20160710193047.18320-1-nicstange@gmail.com). It turned out that the non-x86 related parts of the aforementioned series are more than arguable and I don't want to bother you with any further discussion of those. I apologize for any confusion this split might cause. Applicable to linux-next-20160712. The individual patches don't depend on each other. Changes to v2: - [3/3] ("arch, x86, tsc: inform TSC deadline clockevent device about recalibration") Use clockevents_update_freq() rather than clockevents_config(). - Former [4/4] ("kernel/time/clockevents: compensate for monotonic clock's dynamic frequency") Split off, not a member of this series anymore. Changes to v1: - [1/3] ("arch, x86, tsc deadline clockevent dev: reduce frequency roundoff error") No changes to the patch. Note that the v1 mail could not be delivered to the author of the TSC_DIVISOR introducing commit 279f1461432c ("x86: apic: Use tsc deadline for oneshot when available"), Suresh Siddha , so I had to remove him from the CC list. - [2/3] ("arch, x86, tsc deadline clockevent dev: reduce TSC_DIVISOR to 2") Likewise. - [3/3] ("arch, x86, tsc: inform TSC deadline clockevent device about recalibration") Silence the kbuild test robot on ARCH=i386 by wrapping the new call to lapic_update_tsc_freq() from arch/x86/kernel/tsc.c in an #ifdef CONFIG_X86_LOCAL_APIC. Nicolai Stange (3): arch, x86, tsc deadline clockevent dev: reduce frequency roundoff error arch, x86, tsc deadline clockevent dev: reduce TSC_DIVISOR to 2 arch, x86, tsc: inform TSC deadline clockevent device about recalibration arch/x86/include/asm/apic.h | 1 + arch/x86/kernel/apic/apic.c | 30 ++++++++++++++++++++++++++++-- arch/x86/kernel/tsc.c | 6 ++++++ 3 files changed, 35 insertions(+), 2 deletions(-) -- 2.9.0