Hi Tixy,
I tried to build the linaro IKS kernel (taken from big.LITTLE-IKS-snapshot), but I saw following warnings of missing config options. Are those expected, or did I do anything wrong?
Eric H.
~/work/build/linaro_iks$./build.sh Using linaro/configs/linaro-base.conf as base Merging linaro/configs/android.conf Merging linaro/configs/big-LITTLE-MP.conf Merging linaro/configs/big-LITTLE-IKS.conf Merging linaro/configs/vexpress.conf scripts/kconfig/conf --alldefconfig Kconfig ./.tmp.config.fLRIDDSFsS:115:warning: override: CPU_FREQ_DEFAULT_GOV_INTERACTIVE changes choice state ./.tmp.config.fLRIDDSFsS:144:warning: override: CPU_FREQ_DEFAULT_GOV_PERFORMANCE changes choice state # # configuration written to .config # Value requested for CONFIG_OABI_COMPAT not in final .config Requested value: # CONFIG_OABI_COMPAT is not set Actual value:
Value requested for CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND not in final .config Requested value: CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=y Actual value: # CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND is not set
Value requested for CONFIG_ENABLE_DEFAULT_TRACERS not in final .config Requested value: CONFIG_ENABLE_DEFAULT_TRACERS=y Actual value:
Value requested for CONFIG_USB_G_ANDROID not in final .config Requested value: CONFIG_USB_G_ANDROID=y Actual value:
Value requested for CONFIG_CPU_FREQ_DEFAULT_GOV_INTERACTIVE not in final .config Requested value: CONFIG_CPU_FREQ_DEFAULT_GOV_INTERACTIVE=y Actual value: # CONFIG_CPU_FREQ_DEFAULT_GOV_INTERACTIVE is not set
scripts/kconfig/conf --silentoldconfig Kconfig CHK include/generated/uapi/linux/version.h CHK include/generated/utsrelease.h make[1]: `include/generated/mach-types.h' is up to date. CALL scripts/checksyscalls.sh CC scripts/mod/devicetable-offsets.s GEN scripts/mod/devicetable-offsets.h HOSTCC scripts/mod/file2alias.o HOSTLD scripts/mod/modpost CHK include/generated/compile.h HZFILE kernel/hz.bc BC kernel/timeconst.h CC kernel/time.o GZIP kernel/config_data.gz CHK kernel/config_data.h LD kernel/built-in.o LINK vmlinux LD vmlinux.o MODPOST vmlinux.o GEN .version CHK include/generated/compile.h UPD include/generated/compile.h CC init/version.o LD init/built-in.o KSYM .tmp_kallsyms1.o KSYM .tmp_kallsyms2.o LD vmlinux SORTEX vmlinux SYSMAP System.map OBJCOPY arch/arm/boot/Image Kernel: arch/arm/boot/Image is ready GZIP arch/arm/boot/compressed/piggy.gzip AS arch/arm/boot/compressed/piggy.gzip.o LD arch/arm/boot/compressed/vmlinux OBJCOPY arch/arm/boot/zImage Kernel: arch/arm/boot/zImage is ready UIMAGE arch/arm/boot/uImage Image Name: Linux-3.9.0-rc7-00862-g1d6eaf2-d Created: Sun May 5 12:20:26 2013 Image Type: ARM Linux Kernel Image (uncompressed) Data Size: 3768896 Bytes = 3680.56 kB = 3.59 MB Load Address: 80008000 Entry Point: 80008000
Begin forwarded message:
From: Nicolas Pitre <nicolas.pitre@linaro.orgmailto:nicolas.pitre@linaro.org> Subject: The Linaro IKS code now publicly available Date: May 1, 2013 12:33:38 PM MDT To: "linaro-kernel@lists.linaro.orgmailto:linaro-kernel@lists.linaro.org" <linaro-kernel@lists.linaro.orgmailto:linaro-kernel@lists.linaro.org>, "linaro-dev@lists.linaro.orgmailto:linaro-dev@lists.linaro.org" <linaro-dev@lists.linaro.orgmailto:linaro-dev@lists.linaro.org>
I'm delighted to announce that the Linaro Technical Steering Committee has approved the release of the big.LITTLE in-kernel switcher (IKS) code to the public.
So here it is:
Branch big.LITTLE-IKS-snapshot of git://git.linaro.org/landing-teams/working/arm/kernel.git
Although this is a snapshot of our latest IKS code, it still needs some minor tidying before it is submitted upstream. So please consider the above as a temporary branch for people to look and play with, and not a branch that we'll keep stable and maintain.
This code was also developed for and tested on the VExpress TC2 development platform. An MCPM backend and possibly a special cpufreq clock driver are required for this code to be usable on other platforms.
The switcher concept is discussed here: http://lwn.net/Articles/481055/
Porting documentation is available here: https://wiki.linaro.org/projects/big.LITTLE.MP/Big.Little.Switcher/Docs/port...
The switcher code description is available here (slightly out of date): https://wiki.linaro.org/projects/big.LITTLE.MP/Big.Little.Switcher/Docs/in-k...
And a review of the MCPM layer upon which IKS and HMP rely: http://lwn.net/Articles/539082/
The core MCPM patches are queued for inclusion into the v3.10 mainline kernel. The MCPM backend for TC2 and the IKS patches will tentatively be submitted for v3.11.
Nicolas
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