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Zwane Mwaikambo f370513640 [PATCH] i386 CPU hotplug ... (The i386 CPU hotplug patch provides infrastructure for some work which Pavel is doing as well as for ACPI S3 (suspend-to-RAM) work which Li Shaohua <shaohua.li@intel.com> is doing) The following provides i386 architecture support for safely unregistering and registering processors during runtime, updated for the current -mm tree. In order to avoid dumping cpu hotplug code into kernel/irq/* i dropped the cpu_online check in do_IRQ() by modifying fixup_irqs(). The difference being that on cpu offline, fixup_irqs() is called before we clear the cpu from cpu_online_map and a long delay in order to ensure that we never have any queued external interrupts on the APICs. There are additional changes to s390 and ppc64 to account for this change. 1) Add CONFIG_HOTPLUG_CPU 2) disable local APIC timer on dead cpus. 3) Disable preempt around irq balancing to prevent CPUs going down. 4) Print irq stats for all possible cpus. 5) Debugging check for interrupts on offline cpus. 6) Hacky fixup_irqs() to redirect irqs when cpus go off/online. 7) play_dead() for offline cpus to spin inside. 8) Handle offline cpus set in flush_tlb_others(). 9) Grab lock earlier in smp_call_function() to prevent CPUs going down. 10) Implement __cpu_disable() and __cpu_die(). 11) Enable local interrupts in cpu_enable() after fixup_irqs() 12) Don't fiddle with NMI on dead cpu, but leave intact on other cpus. 13) Program IRQ affinity whilst cpu is still in cpu_online_map on offline. Signed-off-by: Zwane Mwaikambo <zwane@linuxpower.ca> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>		20 years ago
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alpha	[PATCH] update all defconfigs for ARCH_DISCONTIGMEM_ENABLE	20 years ago
arm	[PATCH] ARM: Generic Dynamic Tick Timer support for ARM, take 4	20 years ago
arm26	…
cris	…
frv	…
h8300	[PATCH] ptrace_h8300: condition bugfix	20 years ago
i386	[PATCH] i386 CPU hotplug	20 years ago
ia64	[PATCH] i386 CPU hotplug	20 years ago
m32r	[PATCH] make each arch use mm/Kconfig	20 years ago
m68k	[PATCH] make each arch use mm/Kconfig	20 years ago
m68knommu	…
mips	…
parisc	[PATCH] mm/Kconfig: kill unused ARCH_FLATMEM_DISABLE	20 years ago
ppc	[PATCH] ppc32: remove some unnecessary includes of bootmem.h	20 years ago
ppc64	[PATCH] i386 CPU hotplug	20 years ago
s390	[PATCH] i386 CPU hotplug	20 years ago
sh	[PATCH] mm/Kconfig: kill unused ARCH_FLATMEM_DISABLE	20 years ago
sh64	…
sparc	…
sparc64	[PATCH] compat: introduce compat_time_t	20 years ago
um	[PATCH] kstrdup: convert a few existing implementations	20 years ago
v850	…
x86_64	…
xtensa	[PATCH] Serial: remove unnecessary register_serial/unregister_serial	20 years ago