46bcfad7a8
This patch makes the cpuidle_states structure global (single copy) instead of per-cpu. The statistics needed on per-cpu basis by the governor are kept per-cpu. This simplifies the cpuidle subsystem as state registration is done by single cpu only. Having single copy of cpuidle_states saves memory. Rare case of asymmetric C-states can be handled within the cpuidle driver and architectures such as POWER do not have asymmetric C-states. Having single/global registration of all the idle states, dynamic C-state transitions on x86 are handled by the boot cpu. Here, the boot cpu would disable all the devices, re-populate the states and later enable all the devices, irrespective of the cpu that would receive the notification first. Reference: https://lkml.org/lkml/2011/4/25/83 Signed-off-by: Deepthi Dharwar <deepthi@linux.vnet.ibm.com> Signed-off-by: Trinabh Gupta <g.trinabh@gmail.com> Tested-by: Jean Pihet <j-pihet@ti.com> Reviewed-by: Kevin Hilman <khilman@ti.com> Acked-by: Arjan van de Ven <arjan@linux.intel.com> Acked-by: Kevin Hilman <khilman@ti.com> Signed-off-by: Len Brown <len.brown@intel.com> |
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.. | ||
cpu | ||
vsyscall | ||
.gitignore | ||
asm-offsets.c | ||
cpufreq.c | ||
crash_dump.c | ||
debugtraps.S | ||
disassemble.c | ||
dma-nommu.c | ||
dumpstack.c | ||
dwarf.c | ||
entry-common.S | ||
ftrace.c | ||
head_32.S | ||
head_64.S | ||
hw_breakpoint.c | ||
idle.c | ||
init_task.c | ||
io_trapped.c | ||
io.c | ||
iomap.c | ||
ioport.c | ||
irq_32.c | ||
irq_64.c | ||
irq.c | ||
kdebugfs.c | ||
kgdb.c | ||
kprobes.c | ||
localtimer.c | ||
machine_kexec.c | ||
machvec.c | ||
Makefile | ||
module.c | ||
nmi_debug.c | ||
perf_callchain.c | ||
perf_event.c | ||
process_32.c | ||
process_64.c | ||
process.c | ||
ptrace_32.c | ||
ptrace_64.c | ||
ptrace.c | ||
reboot.c | ||
relocate_kernel.S | ||
return_address.c | ||
setup.c | ||
sh_bios.c | ||
sh_ksyms_32.c | ||
sh_ksyms_64.c | ||
signal_32.c | ||
signal_64.c | ||
smp.c | ||
stacktrace.c | ||
swsusp.c | ||
sys_sh32.c | ||
sys_sh64.c | ||
sys_sh.c | ||
syscalls_32.S | ||
syscalls_64.S | ||
time.c | ||
topology.c | ||
traps_32.c | ||
traps_64.c | ||
traps.c | ||
unwinder.c | ||
vmlinux.lds.S |