Messages in this thread | | | From | "Fenghua Yu" <> | Subject | [PATCH v3 0/7] x86: BSP or CPU0 online/offline | Date | Wed, 9 Nov 2011 16:34:10 -0800 |
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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.
v3: Register a pm notifier to check if CPU0 is online before hibernate/suspend. Small wording changes in document and print info.
v2: Add locking changes between cpu hotplug and hibernate/suspend. Change PIC irq bound to CPU0 detection.
Fenghua Yu (7): x86/topology.c: Support functions for BSP online/offline x86/common.c: Init BSP data during BSP online x86/mtrr/main.c: Ask the first online CPU to save mtrr 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 x86/i387.c: Thread xstate is initialized only on BSP once x86/power/cpu.c: Don't hibernate/suspend if CPU0 is offline
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 | 24 +++++++++++++----- arch/x86/power/cpu.c | 44 +++++++++++++++++++++++++++++++++++ 9 files changed, 155 insertions(+), 20 deletions(-)
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