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4332 discussions

by Tim Northover

Hi again, Sorry for spamming this list with what are essentially support questions, but now that bug #1099896 has been fixed, I'm trying to build an OpenEmbedded filesystem with it, following the instructions at https://wiki.linaro.org/HowTo/ARMv8/OpenEmbedded. What comes out seems amazingly close to a functional system, except that nothing gets put into runlevel 5 so none of the actual programs get started on boot (mainly sshd and a console login obviously, I could work around anything else). Has anyone seen this before or know where I should start looking? I've not really used OpenEmbedded before. Cheers. Tim. -- IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you.

13 years

[GIT PULL]: big LITTLE MP master v14

by Viresh Kumar

Hi Andrey, I know you have already pulled in V14, but it has got changed now. So, please repull it. (Branch: sched-pack-small-tasks-v2 is dropped now) Updates: ------- - Rebased over 3.8-rc2 - per-task-load-average-v3-merged dropped as its already present in 3.8-rc2 - sched-pack-small-tasks-v1-fixed and sched-pack-small-tasks-v1-arm dropped, as sched-pack-small-tasks-v2 contains all required patches. Even sched-pack-small-tasks-v2 is dropped at last moment due to some issues. - Few patches from arm-multi_pmu_v2 dropped as they are already mainlined. - Stats: Total distinct patches: 37 - New Patches: cpufreq-fixes-v2 (5) ------------x-----------------x-------------------- The following changes since commit d1c3ed669a2d452cacfb48c2d171a1f364dae2ed: Linux 3.8-rc2 (2013-01-02 18:13:21 -0800) are available in the git repository at: git://git.linaro.org/arm/big.LITTLE/mp.git big-LITTLE-MP-master-v14 for you to fetch changes up to 56a331912166f0f618f0c0cf633c87967fe487c0: Merge branches 'arm-multi_pmu_v2', 'cpufreq-fixes-v2', 'hw-bkp-v7.1-debug-v2', 'task-placement-v2-sysfs', 'misc-patches' and 'config-fragments' into big-LITTLE-MP-master-v14 (2013-01-23 17:24:03 +0530) ---------------------------------------------------------------- Chris Redpath (2): ARM: Experimental Frequency-Invariant Load Scaling Patch ARM: Fix build breakage when big.LITTLE.conf is not used. Dietmar Eggemann (2): ARM: hw_breakpoint: Check function for OS Save and Restore mechanism ARM: hw_breakpoint: Debug powerdown support for self-hosted debug Jon Medhurst (1): ARM: sched: Avoid empty 'slow' HMP domain Liviu Dudau (1): linaro/configs: big-LITTLE-MP: Enable the new tunable sysfs interface by default. Lorenzo Pieralisi (1): ARM: kernel: provide cluster to logical cpu mask mapping API Morten Rasmussen (14): sched: entity load-tracking load_avg_ratio sched: Task placement for heterogeneous systems based on task load-tracking sched: Forced task migration on heterogeneous systems sched: Introduce priority-based task migration filter ARM: Add HMP scheduling support for ARM architecture ARM: sched: Use device-tree to provide fast/slow CPU list for HMP ARM: sched: Setup SCHED_HMP domains sched: Add ftrace events for entity load-tracking sched: Add HMP task migration ftrace event sched: SCHED_HMP multi-domain task migration control sched: Enable HMP priority filter by default sched: Only down migrate low priority tasks if allowed by affinity mask linaro/configs: Enable HMP priority filter by default sched: Basic global balancing support for HMP Olivier Cozette (1): ARM: Change load tracking scale using sysfs Paul Turner (1): sched: implement usage tracking Sudeep KarkadaNagesha (6): ARM: perf: replace global CPU PMU pointer with per-cpu pointers ARM: perf: register CPU PMUs with idr types ARM: perf: set cpu affinity to support multiple PMUs ARM: perf: set cpu affinity for the irqs correctly ARM: perf: remove spaces in CPU PMU names ARM: perf: save/restore pmu registers in pm notifier Thomas Gleixner (1): genirq: Add default affinity mask command line option Viresh Kumar (9): configs: Add config fragments for big LITTLE MP linaro/configs: Update big LITTLE MP fragment for task placement work config-frag/big-LITTLE: Use device-tree to provide fast/slow CPU list for HMP cpufreq: Manage only online cpus cpufreq: Notify governors when cpus are hot-[un]plugged cpufreq: Don't use cpu removed during cpufreq_driver_unregister cpufreq: Simplify __cpufreq_remove_dev() cpufreq: Simplify cpufreq_add_dev() Merge branches 'arm-multi_pmu_v2', 'cpufreq-fixes-v2', 'hw-bkp-v7.1-debug-v2', 'task-placement-v2-sysfs', 'misc-patches' and 'config-fragments' into big-LITTLE-MP-master-v14 Documentation/devicetree/bindings/arm/pmu.txt | 3 + Documentation/kernel-parameters.txt | 9 + arch/arm/Kconfig | 85 ++ arch/arm/include/asm/hw_breakpoint.h | 3 + arch/arm/include/asm/pmu.h | 12 + arch/arm/include/asm/topology.h | 34 + arch/arm/kernel/hw_breakpoint.c | 56 +- arch/arm/kernel/perf_event.c | 19 + arch/arm/kernel/perf_event_cpu.c | 117 ++- arch/arm/kernel/perf_event_v7.c | 57 +- arch/arm/kernel/topology.c | 120 +++ drivers/cpufreq/cpufreq.c | 321 ++++---- drivers/cpufreq/cpufreq_stats.c | 27 +- drivers/cpufreq/freq_table.c | 9 + include/linux/cpufreq.h | 14 +- include/linux/sched.h | 12 + include/trace/events/sched.h | 153 ++++ kernel/irq/irqdesc.c | 21 +- kernel/sched/core.c | 4 + kernel/sched/debug.c | 3 + kernel/sched/fair.c | 1021 ++++++++++++++++++++++++- kernel/sched/sched.h | 13 +- linaro/configs/big-LITTLE-MP.conf | 13 + 23 files changed, 1886 insertions(+), 240 deletions(-) create mode 100644 linaro/configs/big-LITTLE-MP.conf

13 years

arm 0-day kernel builders?

by Rob Clark

Btw, not sure if any of you have seen the 0-day kbuild setup that intel has.. https://lists.01.org/mailman/listinfo/kbuild runs various builds for different archs on every commit with different configs, randconfig, etc. And various checks with sparse, smatch, etc. Seems kinda useful, and would be a worthwhile goal to get arm arch to the point of "it just compiles and boots" like x86 is, vs arm which has a lot higher tendency to be broken if you don't have the right kernel config, etc. I guess on x86, they boot test all the kernels too on VMs. Perhaps we could go one better with something tied in to lava? BR, -R

13 years

New LAVA filter features: API and result comparison

by Michael Hudson-Doyle

Hi all, A while ago the LAVA team added support for "filters" (as briefly described in http://article.gmane.org/gmane.linux.linaro.devel/13043). A few days ago, we deployed two enhancements to this feature: 1. The first is an API to access filter results. This is documented at: https://validation.linaro.org/lava-server/api/help/#dashboard.get_filter_re… https://validation.linaro.org/lava-server/api/help/#dashboard.get_filter_re… The idea is that this will allow LAVA's users to process the data in LAVA however they like (graphs or notifications based on complicated criteria) without having to get the LAVA team to implement features for them. 2. The second is the ability to compare filter results in the web UI. Find a filter, such as: https://validation.linaro.org/lava-server/dashboard/filters/~mwhudson/pmqa-… click "compare builds", click two builds and click the link that appears to see a comparison such as: https://validation.linaro.org/lava-server/dashboard/filters/~mwhudson/pmqa-… We hope these features improve your experience with LAVA. Let us know of any problems you have with them! Cheers, mwh

13 years

[ANNOUNCE] linux-linaro kernel schedule for 13.01

by Andrey Konovalov

Greetings, The current 13.01 schedule has been published on wiki: https://wiki.linaro.org/Platform/DevPlatform/LinuxLinaroKernelSchedule Initial versions of llct and ll trees has been pushed to g.l.o, kernel/linux-linaro-tracking.git yesterday. The 13.01 release would be v3.8-rc4 based (tentative). Some changes vs 12.12: * new topic in ll for better Snowball support. Currently this is device tree, serial console, emmc, ethernet. * the perf-android patch(es) would be a separate ll topic. Thanks, Andrey

13 years

[PATCH] arm64: vexpress: Select ARCH_REQUIRE_GPIOLIB for PLAT_VEXPRESS

by Jon Medhurst (Tixy)

Patch 25c92a37a (arm64: Always select ARM_AMBA and GENERIC_GPIO) expects platforms to have GPIO so we need to make sure vexpress always has this by selecting ARCH_REQUIRE_GPIOLIB. Without this change drivers like MMC fail to compile due to missing gpio definitions like: In file included from include/linux/gpio.h:48:0, from drivers/mmc/core/slot-gpio.c:12: include/asm-generic/gpio.h: In function 'gpio_get_value_cansleep': include/asm-generic/gpio.h:235:2: error: implicit declaration of function '__gpio_get_value' Signed-off-by: Jon Medhurst <tixy(a)linaro.org> --- Hi Catalin, not sure if this is the correct fix, but it works and matches 32-bit vexpress. arch/arm64/platforms/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/platforms/Kconfig b/arch/arm64/platforms/Kconfig index d2fc931..26d1d14 100644 --- a/arch/arm64/platforms/Kconfig +++ b/arch/arm64/platforms/Kconfig @@ -1,6 +1,6 @@ config PLAT_VEXPRESS bool "ARMv8 software model (Versatile Express)" - select ARCH_WANT_OPTIONAL_GPIOLIB + select ARCH_REQUIRE_GPIOLIB select ARM_AMBA select CLKDEV_LOOKUP select ARM_GIC -- 1.7.10.4

13 years

Question regarding broadcast timer/cpuidle and /proc/interrupts

by Daniel Lezcano

Hi All, I have a question regarding the behavior of cpuidle on pandaboard. 1. cpuidle is enabled 2. The deep idle states seem to be reach for i in $(find /sys/devices/system/cpu -name "usage"); do echo "$i : $(cat $i)"; done /sys/devices/system/cpu/cpu0/cpuidle/state0/usage : 7049 /sys/devices/system/cpu/cpu0/cpuidle/state1/usage : 17 /sys/devices/system/cpu/cpu0/cpuidle/state2/usage : 1341 /sys/devices/system/cpu/cpu1/cpuidle/state0/usage : 6318 /sys/devices/system/cpu/cpu1/cpuidle/state1/usage : 17 /sys/devices/system/cpu/cpu1/cpuidle/state2/usage : 1341 3. Regarding the cpuidle driver code : the "state1" and "state2" are coupled states where the broadcast timer is used instead of the local timer. I assume this is because they go down when we reach these idle states. 4. The content of /proc/interrupts shows no broadcast timer used at all. ... IPI1: 0 0 Timer broadcast interrupts ... Shouldn't be the broadcast timer used sometimes ? or did I miss something ? Thanks. -- Daniel -- <http://www.linaro.org/> Linaro.org │ Open source software for ARM SoCs Follow Linaro: <http://www.facebook.com/pages/Linaro> Facebook | <http://twitter.com/#!/linaroorg> Twitter | <http://www.linaro.org/linaro-blog/> Blog

13 years

[PATCH] clk: allow reparenting of a clock to the orphan list

by Rajagopal Venkat

Allow reparenting of a clock(multiple and single parent) to the orphan list when new parent clock is NULL. Signed-off-by: Rajagopal Venkat <rajagopal.venkat(a)linaro.org> --- drivers/clk/clk.c | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-) diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index e964994..5c9277a 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -1102,7 +1102,7 @@ void __clk_reparent(struct clk *clk, struct clk *new_parent) struct dentry *new_parent_d; #endif - if (!clk || !new_parent) + if (!clk) return; hlist_del(&clk->child_node); @@ -1140,11 +1140,14 @@ static int __clk_set_parent(struct clk *clk, struct clk *parent) { struct clk *old_parent; unsigned long flags; - int ret = -EINVAL; - u8 i; + int ret = 0; + u8 i = 0; old_parent = clk->parent; + if (clk->num_parents == 1 || !parent) + goto migrate; + if (!clk->parents) clk->parents = kzalloc((sizeof(struct clk*) * clk->num_parents), GFP_KERNEL); @@ -1165,11 +1168,13 @@ static int __clk_set_parent(struct clk *clk, struct clk *parent) } if (i == clk->num_parents) { + ret = -EINVAL; pr_debug("%s: clock %s is not a possible parent of clock %s\n", __func__, parent->name, clk->name); goto out; } +migrate: /* migrate prepare and enable */ if (clk->prepare_count) __clk_prepare(parent); @@ -1181,7 +1186,8 @@ static int __clk_set_parent(struct clk *clk, struct clk *parent) spin_unlock_irqrestore(&enable_lock, flags); /* change clock input source */ - ret = clk->ops->set_parent(clk->hw, i); + if (clk->ops->set_parent) + ret = clk->ops->set_parent(clk->hw, i); /* clean up old prepare and enable */ spin_lock_irqsave(&enable_lock, flags); @@ -1215,7 +1221,7 @@ int clk_set_parent(struct clk *clk, struct clk *parent) if (!clk || !clk->ops) return -EINVAL; - if (!clk->ops->set_parent) + if (clk->num_parents > 1 && !clk->ops->set_parent) return -ENOSYS; /* prevent racing with updates to the clock topology */ @@ -1226,7 +1232,7 @@ int clk_set_parent(struct clk *clk, struct clk *parent) /* propagate PRE_RATE_CHANGE notifications */ if (clk->notifier_count) - ret = __clk_speculate_rates(clk, parent->rate); + ret = __clk_speculate_rates(clk, parent ? parent->rate : 0); /* abort if a driver objects */ if (ret == NOTIFY_STOP) -- 1.7.10.4

13 years

[PATCH] clk: remove unreachable code

by Rajagopal Venkat

while reparenting a clock, NULL check is done for clock in consideration and its new parent. So re-check is not required. If done, else part becomes unreachable. Signed-off-by: Rajagopal Venkat <rajagopal.venkat(a)linaro.org> --- drivers/clk/clk.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index 251e45d..f896584 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -1048,10 +1048,7 @@ void __clk_reparent(struct clk *clk, struct clk *new_parent) hlist_del(&clk->child_node); - if (new_parent) - hlist_add_head(&clk->child_node, &new_parent->children); - else - hlist_add_head(&clk->child_node, &clk_orphan_list); + hlist_add_head(&clk->child_node, &new_parent->children); #ifdef CONFIG_COMMON_CLK_DEBUG if (!inited) -- 1.7.10.4

13 years

[PATCH 1/5] ARM: exynos: factor out the idle states

by Daniel Lezcano

The states are defined in the driver. We can get rid of the intermediate cpuidle states initialization and the memcpy by directly initializing the driver states. Signed-off-by: Daniel Lezcano <daniel.lezcano(a)linaro.org> --- arch/arm/mach-exynos/cpuidle.c | 45 +++++++++++++++------------------------- 1 file changed, 17 insertions(+), 28 deletions(-) diff --git a/arch/arm/mach-exynos/cpuidle.c b/arch/arm/mach-exynos/cpuidle.c index 0509241..f8dd1cd 100644 --- a/arch/arm/mach-exynos/cpuidle.c +++ b/arch/arm/mach-exynos/cpuidle.c @@ -40,24 +40,25 @@ static int exynos4_enter_lowpower(struct cpuidle_device *dev, struct cpuidle_driver *drv, int index); -static struct cpuidle_state exynos4_cpuidle_set[] __initdata = { - [0] = ARM_CPUIDLE_WFI_STATE, - [1] = { - .enter = exynos4_enter_lowpower, - .exit_latency = 300, - .target_residency = 100000, - .flags = CPUIDLE_FLAG_TIME_VALID, - .name = "C1", - .desc = "ARM power down", - }, -}; - static DEFINE_PER_CPU(struct cpuidle_device, exynos4_cpuidle_device); static struct cpuidle_driver exynos4_idle_driver = { .name = "exynos4_idle", .owner = THIS_MODULE, .en_core_tk_irqen = 1, + .states = { + [0] = ARM_CPUIDLE_WFI_STATE, + [1] = { + .enter = exynos4_enter_lowpower, + .exit_latency = 300, + .target_residency = 100000, + .flags = CPUIDLE_FLAG_TIME_VALID, + .name = "C1", + .desc = "ARM power down", + }, + }, + .state_count = 2, + .safe_state_index = 0, }; /* Ext-GIC nIRQ/nFIQ is the only wakeup source in AFTR */ @@ -192,33 +193,21 @@ static void __init exynos5_core_down_clk(void) static int __init exynos4_init_cpuidle(void) { - int i, max_cpuidle_state, cpu_id; + int cpu_id; struct cpuidle_device *device; - struct cpuidle_driver *drv = &exynos4_idle_driver; if (soc_is_exynos5250()) exynos5_core_down_clk(); - /* Setup cpuidle driver */ - drv->state_count = (sizeof(exynos4_cpuidle_set) / - sizeof(struct cpuidle_state)); - max_cpuidle_state = drv->state_count; - for (i = 0; i < max_cpuidle_state; i++) { - memcpy(&drv->states[i], &exynos4_cpuidle_set[i], - sizeof(struct cpuidle_state)); - } - drv->safe_state_index = 0; cpuidle_register_driver(&exynos4_idle_driver); for_each_cpu(cpu_id, cpu_online_mask) { device = &per_cpu(exynos4_cpuidle_device, cpu_id); device->cpu = cpu_id; - if (cpu_id == 0) - device->state_count = (sizeof(exynos4_cpuidle_set) / - sizeof(struct cpuidle_state)); - else - device->state_count = 1; /* Support IDLE only */ + /* Support IDLE only */ + if (cpu_id != 0) + device->state_count = 1; if (cpuidle_register_device(device)) { printk(KERN_ERR "CPUidle register device failed\n,"); -- 1.7.9.5

13 years

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