Messages in this thread | | | From | Nicolai Stange <> | Subject | [PATCH v3 0/3] reduce TSC deadline frequency errors | Date | Wed, 13 Jul 2016 15:03:41 +0200 |
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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 <suresh.b.siddha@intel.com>, 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
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