Messages in this thread | | | From | "Fenghua Yu" <> | Subject | [PATCH 0/9] BSP or CPU0 online/offline | Date | Fri, 4 Nov 2011 15:03:52 -0700 |
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From: Fenghua Yu <fenghua.yu@intel.com>
BSP or CPU0 has been the last obstacle to CPU hotplug on x86. This patch set implements BSP online and offline and removes this obstacle to CPU hotplug.
RAS needs the feature. If socket0 needs to be hotplugged for any reason (any thread on socket0 is bad, shared cache issue, uncore issue, etc), CPU0 is required to be offline or hot replaced to keep the system run.
Fenghua Yu (9): include/linux/cpu.h: Define architecture dependent cpu map update and state check functions kernel/cpu.c: Add arch dependent cpu map update functions x86/i387.c: Thread xstate is initialized only on BSP once x86/common.c: Init BSP data during BSP online x86/mtrr/main.c: Ask the first online CPU to save mtrr kernel/power/suspend.c,hibernate.c: Don't hibernate/suspend if CPU0 is offline x86/topology.c: Support functions for BSP online/offline x86/smpboot.c: Don't offline BSP if any irq can not be migrated out of it Documentations/cpu-hotplug.tx, kernel-parameters.txt: Add x86 CPU0 online/offline feature
Documentation/cpu-hotplug.txt | 19 +++++++++++++++ Documentation/kernel-parameters.txt | 13 ++++++++++ arch/x86/include/asm/processor.h | 1 + arch/x86/kernel/cpu/common.c | 13 ++++++++-- arch/x86/kernel/cpu/mtrr/main.c | 9 +++++- arch/x86/kernel/i387.c | 9 ++++++- arch/x86/kernel/smpboot.c | 43 ++++++++++++++++++++++++++++----- arch/x86/kernel/topology.c | 44 +++++++++++++++++++++++++++++----- include/linux/cpu.h | 6 ++++ kernel/cpu.c | 12 +++++++++ kernel/power/hibernate.c | 5 ++++ kernel/power/main.c | 5 ++++ kernel/power/suspend.c | 4 +++ 13 files changed, 163 insertions(+), 20 deletions(-)
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