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Notes & Actions: Linaro Graphics Working Group - Dec 13, 2010

by Alexandros Frantzis

Hi, notes and actions from our Monday graphics cross-vendor call are available on the wiki: + https://wiki.linaro.org/WorkingGroups/Middleware/Graphics/Notes/2010-12-13 Details about when and where of this meeting can be found here: + https://wiki.linaro.org/WorkingGroups/Middleware/Graphics#Weekly%20Public%2… Thanks, -- - Alexandros

14 years, 10 months

Neon registers in core files

by Yao Qi

Hi, Kernel WG, Can recent kernel handle NEON registers in corefiles? Seems we've had plan for this in "Ensure full NEON debug support" in https://wiki.linaro.org/WorkingGroups/KernelConsolidation/Specs/BSPInvestig… Any progress on this piece of work? We want to handle NEON registers in corefiles from GDB, which required kernel dump them in corefile first.

14 years, 10 months

OMAP query about GPMC FIFOTHRESHOLDSTATUS bit

by Peter Maydell

Hi. I have a question about a detail in the OMAP3 TRM, which I was hoping some omap-savvy person on this list might be able to answer. This is about the GPMC prefetch engine register GPMC_PREFETCH_STATUS and specifically its FIFOTHRESHOLDSTATUS bit. I've been using the OMAP35xx TRM (document SPRUF98L, rev L) as reference. The register summary on page 1176 says "set when FIFOPointer exceeds FIFOThreshold value" and is clear that it is 1 if Pointer > Threshold. However the description on page 1141 says "The FIFOPOINTER indicates the current number of available data to be read; FIFOTHRESHOLDSTATUS set to 1 indicates that at least FIFOTHRESHOLD bytes are available from the FIFO", ie the bit is set if Pointer >= Threshold. The text on p1143 is similar. So is the bit set for Pointer > Threshold or Pointer >= Threshold? (Greater-than-or-equal makes more conceptual sense to me and would match the condition in which GPMC_IRQSTATUS's FIFOEVENTSTATUS bit is set.) (I'm looking at this because I'm implementing the prefetch engine in qemu.) thanks in advance -- PMM

14 years, 10 months

[PATCHv2] export clock debug information to user space

by yong.shen＠freescale.com

Change log: 1. rebased on the latest code of git://kernel.ubuntu.com/jk/dt/linux-2.6.git 2. changes according last round of comments

14 years, 10 months

Notes & Actions: Linaro Graphics Working Group - Dec 06, 2010

by Alexandros Frantzis

Hi, notes and actions from our Monday graphics cross-vendor call are available on the wiki: + https://wiki.linaro.org/WorkingGroups/Middleware/Graphics/Notes/2010-12-06 Details about when and where of this meeting can be found here: + https://wiki.linaro.org/WorkingGroups/Middleware/Graphics#Weekly%20Public%2… Thanks, -- - Alexandros

14 years, 10 months

kdump on ARM

by Ken Werner

Hi there, Does anyone know if it's possible to use kdump on an ARM board to capture a memory image of the kernel (to be later analyzed with crash for example)? I had a quick look at the kernel config options provided by the linaro-linux tree and it seems that kexec support (CONFIG_KEXEC) is there. I assume /sbin/kexec could be used to load a dump-capture kernel. Unfortunately CONFIG_CRASH_DUMP is not available, so I don't know how to configure such a kernel. Any pointers or suggestions are appreciated. Regards Ken

14 years, 10 months

Linaro Infrastructure Team Weekly Report (2010-12-03 to 2010-12-09)

by Ian Smith

All, The weekly report for the Linaro Infrastructure team may be found at:- Status report: https://wiki.linaro.org/Platform/Infrastructure/Status/2010-12-09 Burndown chart: This link is awaiting the production of new burndown charts. The Infrastructure related blueprints from the maverick cycle, of which currently there are 4 active ones (4 from the last report), are showing that there are 8 work items in progress (8 last report), and 11 work items to undertake (11 last report). These are to be moved into the natty cycle if still required. * arm-m-validation-dashboard; no change in status from last report; 3 in progress; 7 to do * arm-m-image-building-console; no change in status from last report; 3 in progress; 3 to do * arm-m-automated-testing-framework; no change in status from last report; 1 in progress; 0 to do * arm-m-testsuites-and-profilers; no change in status from last report; 1 in progress; 1 to do In the natty cycle, the following lists the current active Blueprints, or Blueprints planned and not started. Currently there are 4 active Blueprints (4 from the last report), which are showing that there are 8 work items in progress (7 last report), 41 work items to undertake (46 last report), 2 work items postponed (0 last report) and 8 work items added (all items added last report). * other-linaro-n-improve-linaro-media-create: 5 work items completed (2 last week); 4 work items in progress (3 last week); 8 work items to do (8 last week); 2 work items added this week (2 last week). * other-linaro-n-test-result-display-in-launch-control: 0 work items completed (8 last week); 1 work item in progress (1 last week); 10 work items to do (10 last week); 0 work items added (4 last week) * other-linaro-n-patch-tracking: 0 work item completed (0 last week); 2 work items in progress (2 last week); 9 work items to do (9 last week) * other-linaro-n-image-building: 2 work items in progress (2 last week); 5 work items to do (5 last week); 2 work items postponed (2 last week); 0 work items added (2 last week) * other-linaro-n-continuous-integration: Not started - awaiting a Hudson build server (RT#42278). * other-linaro-n-package-development-tools: Not Started; 9 work items to do Specifics accomplished this week include:- * other-linaro-n-image-building: "4.6 Multiple hwpacks": basically done - needing test and review. * ImproveLinaroMediaCreate: completed the ports to Python of "populate_boot" and "create_partitions" - waiting for review on "create partitions" * Added blueprint/bug links to the LaunchPad API. This is now landed and tested. * Also finished porting the work items tracker to use the launchpad APIPlease let me know if you have any comments or questions. Kind Regards, Ian

14 years, 10 months

Linaro Foundations Team Weekly Report (2010-12-02 to 2010-12-08)

by Steve Langasek

The weekly report for the Linaro Foundations team may be found at: Status report: https://wiki.linaro.org/Platform/Foundations/2010-12-08 Overall status (out of date until workitem tracker for 11.05 is available): https://wiki.linaro.org/Platform/Foundations/Status * A first 2.6.37 kernel is now packaged and available in Ubuntu natty for inclusion in Linaro images. * Cross-compiler packages have been merged and uploaded to natty, preparing us for gcc 4.5 as a default cross-compiler. * Progress on ALIP continues, with all but two of the original ALIP packages now successfully cross-buildable with patches applied. Actions: * npitre to write up more formal documentation of what our kernel tree is (and isn't): DONE * slangasek to review armel-cross-toolchain-base merge request: DONE -- Steve Langasek Give me a lever long enough and a Free OS Debian Developer to set it on, and I can move the world. Ubuntu Developer http://www.debian.org/ slangasek(a)ubuntu.com vorlon(a)debian.org

14 years, 10 months

Ftrace on the CA9x4 vexpress

by Ken Werner

Hi, I did some quick ftrace tests using the linaro-vexpress 2.6.35-1010.17 kernel on an ARM-Versatile Express CA9x4 board. It seems to work pretty good. I noticed only one issue with the wakeup latency tracer where /sys/kernel/debug/tracing/trace doesn't show any real information but the /sys/kernel/debug/tracing/trace_pipe does. The details can be found at: https://wiki.linaro.org/KenWerner/Sandbox/ftrace Regards Ken

14 years, 10 months

Minutes & actions: Kernel Working Group meeting of Dec 6, 2010

by Mounir Bsaibes

Greetings, Enclosed you'll find a link to the agenda, minutes and actions from the Linaro kernel working group weekly meeting of Dec 06, 2010. https://wiki.linaro.org/WorkingGroups/KernelConsolidation/Meetings/2010-12-…<https://wiki.linaro.org/WorkingGroups/KernelConsolidation/Meetings/2010-11-…> == Summary == * Dave Martin & Nico reviewed K2.x blueprints, bp's are Approved now. * Tool to measure and fix SD card performance. Found a case of excessive copy-and-paste, gaining unneeded abstraction layers not yet needed for this non-ARM Unicore architecture. * Mainlined Flash support, available in git.stericsson.org, also taken into the linux-arm-kernel tree 2.6.37. * Implemented USB transceiver driver as drivers/usb/otg. Cleaning up MUSB BSP for 8500 crossover code. Gadget code sent out for internal ST-Ericsson review, will post publicly after resolved. * Posted the five uboot patches to the list, built and tested the first two on all available platforms. Need additional testing, especially on big-endian platforms such as PowerPC. * Reviewing status. A few specifications and blueprints not yet complete, status lagging on some. Working on New Members wiki page. * ST-Ericsson Landing team going well. Finding problems, getting fixes. Waiting on some fixes from internal ST-Ericsson teams. Currently relying on to-be-written functionality. Team is under NDA, so can pull some patches from internal teams prior to upstreaming. Some issues with source-tree organization within ST-Ericsson, which is being resolved by having a single tree that functionality is added to via topic branches. * Thumb 2 work progressing. A couple of patches to be merged into 2.6.36 tree. Freescale BSP review progress. * OMAP4-EHCI support queued up in linux-usb tree for 2.6.38 * Document describing Linaro kernel, will publish on list and ask for comments. * Completed blocked-task-list reorganization for RCU_TREE priority boosting, and started coding up changes needed to move from softirq to kthread. Possible RCU energy-consumption issue appearing on lightly loaded systems with modest numbers of CPUs: RCU prevents entry into dyntick-idle mode: Examining possible approaches. Please let me know if you have a question or comment, Regards, Mounir

14 years, 10 months

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