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4332 discussions

Deadline scheduler inclusion in linux-linaro?

by Amit Kucheria

Hi all, As part of our investigations into the Linux scheduler we've interacted with Juri Lelli at the University of Pisa (cc'ed) who is part of a group that is working on a DEADLINE scheduler[1] for Linux[2]. While we're coming at this from a power managment angle[3], I suspect that LEG and LNG already have real-world usecases that would benefit from deadline scheduler found in other RTOSes. So I think it makes sense to merge Juri's tree into linux-linaro going forward to allow easier experimentation. Does LEG and LNG have any interest in this at this point? Juri has expressed an interest in maintaining a current branch of the code that could be merged into our monthly release. In return, real world usecases will improve his chances of getting the code merged into mainline. Regards, Amit [1] http://retis.sssup.it/?q=node/35 [2] https://lkml.org/lkml/2013/2/11/373 [3] Mostly involving discussions at this point, no real engineering effort invested yet

13 years, 1 month

Test Result Summary of Calendar Week 21, 2013 for Linux Linaro ubuntu Raring.

by Botao Sun

Calendar Week 21, 2013: Here is test result summary for Linux Linaro ubuntu Raring image on following boards: 1) ARM Versatile Express A9; 2) Samsung Arndale; 3) TI Panda 4430; 4) TI Panda 4460; 5) ST Ericsson Snowball. Synopsis: STE Snowball is not stable enough; "Reboot" works well on ARM Versatile Express A9. 1. ARM Versatile Express A9 + Linux Linaro Raring (Column W): https://docs.google.com/a/linaro.org/spreadsheet/ccc?key=0AroPySpr4FnEdFNmV… Only "Halt" test failed, all other features work well. 2. Samsung Arndale + Linux Linaro Raring (Column Q): https://docs.google.com/a/linaro.org/spreadsheet/ccc?key=0AgB-fT5LL31CdGZJS… "Halt" test failed; some errors show in power management test. All other features work well. 3. TI Panda 4430 + Linux Linaro Raring (Column W): https://docs.google.com/a/linaro.org/spreadsheet/ccc?key=0AroPySpr4FnEdEwwZ… WiFi and display output are unavailable; some errors show in power management test. All other features work well. 4. TI Panda 4460 + Linux Linaro Raring (Column W): https://docs.google.com/a/linaro.org/spreadsheet/ccc?key=0AroPySpr4FnEdEwwZ… WiFi and display output are unavailable; Kernel panic happened in power management test. All other features work well. 5. ST Ericsson Snowball + Linux Linaro Raring (Column X): https://docs.google.com/a/linaro.org/spreadsheet/ccc?key=0AroPySpr4FnEdFJ4X… System is not stable enough. Sometimes booting failed, and "apt-get" failed as well. Many CRC errors got observed in SD MMC test, display output is unavailable. "Reboot" test failed. For the release critical test summary of last week (Calendar Week 20), please refer to attachment. Thank you. Best Regards Botao Sun

13 years, 1 month

gator profiling

by Chao Xie

hi When i download the git.linaro.org/git-ro/landing-teams/working/arm/kernel.git, there are branches relates to gator. I set up the enviroment at TC2 with gator and Dstream. I want to show the CPU frequencies of big and little clusters, so i add code in gator to get the frequency of the clusters. But it seems that gator wakes up in period and send out the message. So is there any way that make gator to wake up based on events of cpu frequency changing, and send out the message to Dstream?

13 years, 1 month

Patch merge request for STE Snowball build failure on linux-arm-soc-for-next.

by Botao Sun

Hi, There is a build failure for STE Snowball on "linux-arm-soc-for-next" branch in Linaro Kernel CI system: https://ci.linaro.org/jenkins/job/linux-arm-soc-for-next/hwpack=snowball,la… which is caused by: 01:31:32 /mnt/ci_build/workspace/linux-arm-soc-for-next/hwpack/snowball/label/kernel_cloud/drivers/mfd/ab8500-debugfs.c:95:23: fatal error: mach/irqs.h: No such file or directory 01:31:32 #include <mach/irqs.h> 01:31:32 ^ 01:31:32 compilation terminated. 01:31:32 make[3]: *** [drivers/mfd/ab8500-debugfs.o] Error 1 01:31:32 make[2]: *** [drivers/mfd] Error 2 01:31:32 make[1]: *** [drivers] Error 2 To solve this issue, here is the patch which Linux Walleij provided on 11 April 2013: https://lkml.org/lkml/2013/4/11/101 Would anyone like to merge the patch to fix this compiling error? Thank you in advance for your efforts! Best Regards Botao Sun

13 years, 1 month

Repo for Managing Git Repositories

by Christopher Covington

Hi Marcin, I notice you've created a number of shell scripts to manage checking out multiple git repositories, specific revisions of git repositories for a release, etc. Repo [1] does this stuff pretty well that you might want to consider as an eventual alternative. 1. https://gerrit.googlesource.com/git-repo/+/stable Here's one example of a Repo manifest for an OpenEmbedded-based project, albeit with extra packages thrown in. You can ignore the things with a path outside of oe-core. https://www.codeaurora.org/gitweb/quic/le/?p=mdm/manifest.git;a=blob;f=caf_… Once you've got a git repository the with manifest file, the usage mechanics are something along the lines of downloading repo itself if not already available [2], passing the manifest repository's URL (can be local) to repo init, and then running repo sync to clone all the repositories from the source URLs to the destination paths at the revisions specified in the manifest file. 2. http://source.android.com/source/downloading.html Regards, Christopher -- Employee of Qualcomm Innovation Center, Inc. Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by the Linux Foundation.

13 years, 1 month

Unable to clone the Panda Kernel 3.2.0+ - Community user

by Denny G

Hello I tried to clone the panda kernel. But I get the below errors I ran the command: from /tmp/ folder on my Fedora FC15 machine, x86 git clone http://android.git.linaro.org/git-ro/kernel/panda pandakernel I am pasting the errors I received: git clone http://android.git.linaro.org/git-ro/kernel/panda pandakernel Cloning into pandakernel... error: Unable to get pack index http://android.git.linaro.org/git-ro/kernel/panda/objects/pack/pack-7acac70… error: Unable to get pack index http://android.git.linaro.org/git-ro/kernel/panda/objects/pack/pack-7662024… error: Unable to get pack index http://android.git.linaro.org/git-ro/kernel/panda/objects/pack/pack-4e2779a… error: Unable to get pack index http://android.git.linaro.org/git-ro/kernel/panda/objects/pack/pack-09e684d… error: Unable to get pack index http://android.git.linaro.org/git-ro/kernel/panda/objects/pack/pack-9db9fb6… error: Unable to get pack file http://android.git.linaro.org/git-ro/kernel/panda/objects/pack/pack-523b51c… couldn't connect to host error: Unable to find 8d742e3c9d98c3ef7499d62de1ac0f0efa0daf8c under http://android.git.linaro.org/git-ro/kernel/panda Cannot obtain needed object 8d742e3c9d98c3ef7499d62de1ac0f0efa0daf8c error: Fetch failed. Can you please help me if I am missing out any steps? I am struck at this point and not able to move ahead. Kindly provide me an pointer as what is going wrong.

13 years, 1 month

Help for Foundation model

by Wang Wei

Hi all, Foundation model is closed source propertiary software, but i want to know how i can get more detailed and comprehensive technical support? I want to know the work procedure of boot wrapper. For example, make CROSS_COMPILE=aarch64-linux-gnu- BOOTARGS='"root=/dev/vda2 consolelog=9 rw console=ttyAMA0"' FDT_SRC=vexpress-foundation-v8.dts IMAGE=linux-system-foundation.axf. What use are the arguments of BOOTARGS and FDT_SRC? Whether they are used by foundation model or real OS ? what real use is vexpress-foundation-v8.dts? Thanks Xiaoke Wu

13 years, 1 month

automated build coverage

by Mike Turquette

Hi all, I just wanted to forward this thread from LAKML to linaro-dev: http://article.gmane.org/gmane.linux.ports.tegra/10683 Seems there is lots desire for an improvement to automated build coverage and automated reporting along with it. Regards, Mike

13 years, 1 month

Cross-Compiling Qemu for Aarch64?

by Mian M. Hamayun

Hello Everyone, I am reposting the following message to linaro-dev as I am using the following linaro toolchain for ARM64 cross-compilation: https://wiki.linaro.org/HowTo/BuildArm64Kernel In fact, I am trying to compile qemu for Aarch64 but so far I haven't been able to configure qemu for this purpose. My first objective is to just configure and cross-compile qemu for Aarch64, which is currently blocked by the qemu's dependency on cross-compiled "glib-2.12" or later. For example, when I use the following configure command: ./configure --cross-prefix=aarch64-linux-gnu- --target-list=arm-softmmu --enable-fdt --static I get the following error: ERROR: glib-2.12 required to compile QEMU This is a well-known dependency and the following pages are linked to this issue (directly or indirectly) and I have tried all of them without any success: https://bugs.launchpad.net/linaro-oe/+bug/1097561 http://people.debian.org/~wookey/bootstrap.html http://wiki.xen.org/wiki/Xen_ARM_with_Virtualization_Extensions/CrossCompil… https://wiki.linaro.org/Platform/DevPlatform/CrossCompile/arm64bootstrap I have also tried the latest git repository from John Rigby but I get the same error: https://git.linaro.org/gitweb?p=people/jcrigby/qemu-aarch64.git;a=summary Anyways, I want to know how we can resolve this dependency ? Some of you might suggest to cross-compile the glib-2.12 from sources found at: http://www.linuxfromscratch.org/blfs/view/6.3/general/glib2.html http://www.gtk.org/api/2.6/glib/glib-cross-compiling.html but even this option doesn't work for me as the apparent lacking support for Aarch64 in "glib-2.12". I have used the following configure command: ./configure --prefix=/my/prefix/path --host=aarch64-linux-gnu --cache-file=aarch64.cache with the following aarch64.cache file contents: glib_cv_long_long_format=I64 glib_cv_stack_grows=no Any pointers and/or directions for a possible solution will be highly appreciated. Thanks in advance, Hamayun

13 years, 1 month

[RFC PATCH 0/6] ARM: cpuhotplug: move common functions to core

by Sanjay Singh Rawat

Various SoCs with arm processors define their own platform hotplug related functions. These functions can be defined as part of the core cpu hotplug functions, this will avoid the duplication. This patchset is intended to address this issue. This patchset covers arm-Cortex-A9 of exynos, imx, realview, spear and vexpress SoCs. Not having h/w, the patch is not tested. Sanjay Singh Rawat (6): ARM: cpuhotplug: move common hotplug related functions to core ARM: imx: use the core cpu hotplug functions ARM: RealView: use the core cpu hotplug functions ARM: spear: use the core cpu hotplug functions ARM: vexpress: use the core cpu hotplug functions ARM: EXYNOS: use the core cpu hotplug functions arch/arm/include/asm/hotplug.h | 24 ++++++++++++++ arch/arm/kernel/Makefile | 1 + arch/arm/kernel/cpuhotplug.c | 64 ++++++++++++++++++++++++++++++++++++++ arch/arm/mach-exynos/hotplug.c | 40 ++---------------------- arch/arm/mach-imx/hotplug.c | 22 +------------ arch/arm/mach-realview/hotplug.c | 37 +--------------------- arch/arm/mach-spear/hotplug.c | 37 +--------------------- arch/arm/mach-vexpress/hotplug.c | 38 +--------------------- 8 files changed, 95 insertions(+), 168 deletions(-) create mode 100644 arch/arm/include/asm/hotplug.h create mode 100644 arch/arm/kernel/cpuhotplug.c -- 1.7.9.5

13 years, 1 month

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