The first batch of patches was posted here:
http://news.gmane.org/group/gmane.linux.ports.arm.kernel/thread=253942
They're now merged in RMK's devel-stable branch and also available via the linux-next tree.
So here's the second set of patches towards a fully functional and production quality switcher solution, establishing a landmark to compare against for any scheduler based solution meant to eventually surpass the switcher in the mainline kernel.
Those patches are also available here:
git://git.linaro.org/people/nico/linux iks
This set is divided in 3 groups:
Patches 1 to 3 are needed for proper interaction and synchronization with the cpufreq companion driver that will be posted separately.
Patches 4 to 9 are providing significant switch latency and efficiency improvements and are purely for optimization purposes.
Patches 10 to 13 are for switch event tracing.
Here's the diffstat:
arch/arm/common/bL_switcher.c | 264 ++++++++++++++++++++++--- arch/arm/common/mcpm_entry.c | 12 ++ arch/arm/common/mcpm_head.S | 16 +- arch/arm/include/asm/bL_switcher.h | 62 +++++- arch/arm/include/asm/hardirq.h | 2 +- arch/arm/include/asm/mcpm.h | 8 + arch/arm/include/asm/smp.h | 2 + arch/arm/kernel/smp.c | 21 ++ drivers/irqchip/irq-gic.c | 43 ++++ include/linux/irqchip/arm-gic.h | 2 + include/trace/events/power_cpu_migrate.h | 67 +++++++ 11 files changed, 471 insertions(+), 28 deletions(-)