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[PATCH 00/21] CPUIdle: Minor cleanups for 3.13

by Viresh Kumar

Hi Rafael/Daniel, This is a small cleanup patchset for CPUIdle which can go in 3.13 if it looks okay to you guys.. Mostly trivial patches but few are doing good/significant changes. Tested on my thinkpad with suspend/resume and didn't found any broken stuff with it. I a not very sure about this patch (As I don't know about all aspects of CPUIdle framework): cpuidle: don't call poll_idle_init() for every cpu -- viresh Viresh Kumar (21): cpuidle: fix indentation of cpumask cpuidle: Fix comments in cpuidle core cpuidle: make __cpuidle_get_cpu_driver() inline cpuidle: make __cpuidle_device_init() return void cpuidle: make __cpuidle_driver_init() return void cpuidle: rearrange code in __cpuidle_driver_init() cpuidle: rearrange __cpuidle_register_device() to keep minimal exit points cpuidle: use cpuidle_disabled() instead of "off" cpuidle: merge two if() statements for checking error cases cpuidle: reduce code duplication inside cpuidle_idle_call() cpuidle: replace multiline statements with single line in cpuidle_idle_call() cpuidle: call cpuidle_get_driver() from after taking cpuidle_driver_lock cpuidle: use drv instead of cpuidle_driver in show_current_driver() cpuidle: coupled: don't compare cpu masks unnecessarily cpuidle: free all state kobjects from cpuidle_free_state_kobj() cpuidle: avoid unnecessary kzalloc/free of struct cpuidle_device_kobj cpuidle: avoid unnecessary kzalloc/free of struct cpuidle_driver_kobj cpuidle: don't call poll_idle_init() for every cpu cpuidle: create list of registered drivers cpuidle: don't calculate time-diff if entered_state == 0 cpuidle: change governor from within cpuidle_replace_governor() drivers/cpuidle/coupled.c | 9 +-- drivers/cpuidle/cpuidle.c | 95 +++++++------------------ drivers/cpuidle/driver.c | 171 ++++++++++++++++++++------------------------- drivers/cpuidle/governor.c | 24 +++---- drivers/cpuidle/sysfs.c | 74 +++++++------------- include/linux/cpuidle.h | 25 +++++-- 6 files changed, 161 insertions(+), 237 deletions(-) -- 1.7.12.rc2.18.g61b472e

11 years, 11 months

linus/master boot: 29 pass, 0 fail (v3.12-rc3-253-ge6e7fb1)

by Kevin Hilman build bot

Automated DT boot report for various ARM defconfigs. Boot test simply checks if kernel can boot to initramfs with busybox and run some basic commands (e.g. 'cat /proc/cpuinfo'). Tree/Branch: linus/master Git describe: v3.12-rc3-253-ge6e7fb1 Commit: e6e7fb1ffc Merge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Full Report =========== arm-tegra_defconfig ------------------- tegra30-beaver PASS: 0 min 17.9 sec arm-omap2plus_defconfig ----------------------- am335x-boneblack PASS: 0 min 29.8 sec omap3-beagle-xm PASS: 0 min 51.8 sec am335x-bone PASS: 0 min 26.3 sec omap3-tobi,3530overo PASS: 0 min 42.4 sec omap4-panda PASS: 1 min 6.1 sec omap4-panda-es PASS: 1 min 9.3 sec omap3-tobi,3730storm PASS: 0 min 41.1 sec omap3-beagle PASS: 0 min 55.1 sec arm-imx_v6_v7_defconfig ----------------------- imx6dl-wandboard,wand-dual PASS: 0 min 16.5 sec imx6dl-wandboard,wand-solo PASS: 0 min 16.4 sec imx6q-wandboard PASS: 0 min 14.9 sec arm-multi_v7_defconfig ---------------------- tegra30-beaver PASS: 0 min 15.1 sec am335x-boneblack PASS: 0 min 34.6 sec omap3-beagle-xm PASS: 0 min 50.2 sec armada-370-mirabox PASS: 0 min 19.4 sec omap4-panda PASS: 1 min 0.9 sec omap4-panda-es PASS: 1 min 6.1 sec sun4i-a10-cubieboard PASS: 0 min 14.6 sec imx6dl-wandboard,wand-solo PASS: 0 min 16.6 sec omap3-tobi,3530overo PASS: 0 min 40.8 sec am335x-bone PASS: 0 min 33.4 sec imx6q-wandboard PASS: 0 min 15.8 sec omap3-tobi,3730storm PASS: 0 min 39.9 sec imx6dl-wandboard,wand-dual PASS: 0 min 16.8 sec omap3-beagle PASS: 0 min 55.0 sec arm-exynos_defconfig -------------------- exynos5250-arndale PASS: 0 min 30.0 sec arm-mvebu_defconfig ------------------- armada-370-mirabox PASS: 0 min 19.3 sec arm-sama5_defconfig ------------------- sama5d35ek PASS: 0 min 18.3 sec

11 years, 11 months

linus/master boot: 29 pass, 0 fail (v3.12-rc3-216-g164a2c5)

by Kevin Hilman build bot

Automated DT boot report for various ARM defconfigs. Boot test simply checks if kernel can boot to initramfs with busybox and run some basic commands (e.g. 'cat /proc/cpuinfo'). Tree/Branch: linus/master Git describe: v3.12-rc3-216-g164a2c5 Commit: 164a2c5822 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc Full Report =========== arm-tegra_defconfig ------------------- tegra30-beaver PASS: 0 min 17.9 sec arm-omap2plus_defconfig ----------------------- am335x-boneblack PASS: 0 min 30.3 sec omap3-beagle-xm PASS: 0 min 52.5 sec am335x-bone PASS: 0 min 26.3 sec omap3-tobi,3530overo PASS: 0 min 42.5 sec omap4-panda PASS: 1 min 5.3 sec omap4-panda-es PASS: 1 min 7.6 sec omap3-tobi,3730storm PASS: 0 min 41.2 sec omap3-beagle PASS: 0 min 57.6 sec arm-imx_v6_v7_defconfig ----------------------- imx6dl-wandboard,wand-dual PASS: 0 min 16.3 sec imx6dl-wandboard,wand-solo PASS: 0 min 16.3 sec imx6q-wandboard PASS: 0 min 15.0 sec arm-multi_v7_defconfig ---------------------- tegra30-beaver PASS: 0 min 15.1 sec am335x-boneblack PASS: 0 min 34.6 sec omap3-beagle-xm PASS: 0 min 46.9 sec armada-370-mirabox PASS: 0 min 19.4 sec omap4-panda PASS: 1 min 0.2 sec omap4-panda-es PASS: 1 min 4.0 sec sun4i-a10-cubieboard PASS: 0 min 11.5 sec imx6dl-wandboard,wand-solo PASS: 0 min 16.4 sec omap3-tobi,3530overo PASS: 0 min 40.9 sec am335x-bone PASS: 0 min 33.4 sec imx6q-wandboard PASS: 0 min 15.7 sec omap3-tobi,3730storm PASS: 0 min 40.5 sec imx6dl-wandboard,wand-dual PASS: 0 min 16.6 sec omap3-beagle PASS: 1 min 1.4 sec arm-exynos_defconfig -------------------- exynos5250-arndale PASS: 0 min 29.6 sec arm-mvebu_defconfig ------------------- armada-370-mirabox PASS: 0 min 19.3 sec arm-sama5_defconfig ------------------- sama5d35ek PASS: 0 min 18.7 sec

11 years, 11 months

linus/master boot: 29 pass, 0 fail (v3.12-rc3-211-g981d901)

by Kevin Hilman build bot

Automated DT boot report for various ARM defconfigs. Boot test simply checks if kernel can boot to initramfs with busybox and run some basic commands (e.g. 'cat /proc/cpuinfo'). Tree/Branch: linus/master Git describe: v3.12-rc3-211-g981d901 Commit: 981d901095 Merge git://git.kvack.org/~bcrl/aio-next Full Report =========== arm-tegra_defconfig ------------------- tegra30-beaver PASS: 0 min 18.3 sec arm-omap2plus_defconfig ----------------------- am335x-boneblack PASS: 0 min 30.0 sec omap3-beagle-xm PASS: 0 min 51.8 sec am335x-bone PASS: 0 min 26.3 sec omap3-tobi,3530overo PASS: 0 min 42.3 sec omap4-panda PASS: 1 min 6.5 sec omap4-panda-es PASS: 1 min 13.3 sec omap3-tobi,3730storm PASS: 0 min 41.0 sec omap3-beagle PASS: 0 min 51.2 sec arm-imx_v6_v7_defconfig ----------------------- imx6dl-wandboard,wand-dual PASS: 0 min 16.4 sec imx6dl-wandboard,wand-solo PASS: 0 min 16.4 sec imx6q-wandboard PASS: 0 min 14.9 sec arm-multi_v7_defconfig ---------------------- tegra30-beaver PASS: 0 min 15.1 sec am335x-boneblack PASS: 0 min 39.6 sec omap3-beagle-xm PASS: 0 min 52.6 sec armada-370-mirabox PASS: 0 min 19.4 sec omap4-panda PASS: 1 min 1.3 sec omap4-panda-es PASS: 1 min 4.0 sec sun4i-a10-cubieboard PASS: 0 min 11.6 sec imx6dl-wandboard,wand-solo PASS: 0 min 16.4 sec omap3-tobi,3530overo PASS: 0 min 41.1 sec am335x-bone PASS: 0 min 33.4 sec imx6q-wandboard PASS: 0 min 15.6 sec omap3-tobi,3730storm PASS: 0 min 40.2 sec imx6dl-wandboard,wand-dual PASS: 0 min 16.6 sec omap3-beagle PASS: 0 min 49.5 sec arm-exynos_defconfig -------------------- exynos5250-arndale PASS: 0 min 30.0 sec arm-mvebu_defconfig ------------------- armada-370-mirabox PASS: 0 min 19.3 sec arm-sama5_defconfig ------------------- sama5d35ek PASS: 0 min 19.7 sec

11 years, 11 months

[PATCH v5 0/4] Target CPU=Host implementation for KVM ARM/ARM64

by Anup Patel

It will be very useful for user space (QEMU/KVMTOOL) if it has a method of querying VCPU target type matching to underlying Host. We can use such querying mechanism and implement machine models in user space where VCPU target type is always same-as/similar-to underlying Host (i.e. Target CPU=Host). This patch series implements KVM_ARM_PREFERRED_TARGET vm ioclt for querying VCPU target type matching underlying host. Using this new ioctl we can implement VCPU target CPU=Host in user space. Also, it is not mandatory to call KVM_ARM_PREFERRED_TARGET vm ioctl and the old method of trying all possible target types using the KVM_ARM_VCPU_INIT ioctl to initialize VCPU works fine. V5: - Update documentation based on review comments V4: - Fixed files exchanged between patches - For now return zeroed features in struct kvm_vcpu_init instance V3: - Return -ENODEV if no preferred target available for host - Make KVM_ARM_PREFERRED_TARGET ioctl as vm ioctl V2: - Renamed the ioclt to KVM_ARM_PREFERRED_TARGET - Return struct kvm_vcpu_init instace instead of just target type V1: - Initial patch-set with ioctl named as KVM_ARM_SUITABLE_TARGET Anup Patel (4): ARM: KVM: Implement kvm_vcpu_preferred_target() function ARM64: KVM: Implement kvm_vcpu_preferred_target() function ARM/ARM64: KVM: Implement KVM_ARM_PREFERRED_TARGET ioctl KVM: Add documentation for KVM_ARM_PREFERRED_TARGET ioctl Documentation/virtual/kvm/api.txt | 31 +++++++++++++++++++++++++++---- arch/arm/include/asm/kvm_host.h | 1 + arch/arm/kvm/arm.c | 13 +++++++++++++ arch/arm/kvm/guest.c | 20 ++++++++++++++++++++ arch/arm64/include/asm/kvm_host.h | 1 + arch/arm64/kvm/guest.c | 20 ++++++++++++++++++++ include/uapi/linux/kvm.h | 1 + 7 files changed, 83 insertions(+), 4 deletions(-) -- 1.7.9.5

11 years, 11 months

[PATCH] arm64: check for number of arguments in syscall_get/set_arguments()

by AKASHI Takahiro

In ftrace_syscall_enter(), syscall_get_arguments(..., 0, n, ...) if (i == 0) { <handle orig_x0> ...; n--;} memcpy(..., n * sizeof(args[0])); If 'number of arguments(n)' is zero and 'argument index(i)' is also zero in syscall_get_arguments(), none of arguments should be copied by memcpy(). Otherwise 'n--' can be a big positive number and unexpected amount of data will be copied. Tracing system calls which take no argument, say sync(void), may hit this case and eventually make the system corrupted. This patch fixes the issue both in syscall_get_arguments() and syscall_set_arguments(). Please note, however, that asm-generic/syscall.h says, * syscall_get_arguments - extract system call parameter values * @i: argument index [0,5] * @n: number of arguments; n+i must be [1,6]. and so we'd better change the caller's code(ftrace_syscall_enter). Signed-off-by: AKASHI Takahiro <takahiro.akashi(a)linaro.org> --- arch/arm64/include/asm/syscall.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/arm64/include/asm/syscall.h b/arch/arm64/include/asm/syscall.h index c89821f..01bb8cc 100644 --- a/arch/arm64/include/asm/syscall.h +++ b/arch/arm64/include/asm/syscall.h @@ -63,6 +63,9 @@ static inline void syscall_get_arguments(struct task_struct *task, unsigned int i, unsigned int n, unsigned long *args) { + if (n == 0) + return; + if (i + n > SYSCALL_MAX_ARGS) { unsigned long *args_bad = args + SYSCALL_MAX_ARGS - i; unsigned int n_bad = n + i - SYSCALL_MAX_ARGS; @@ -86,6 +89,9 @@ static inline void syscall_set_arguments(struct task_struct *task, unsigned int i, unsigned int n, const unsigned long *args) { + if (n == 0) + return; + if (i + n > SYSCALL_MAX_ARGS) { pr_warning("%s called with max args %d, handling only %d\n", __func__, i + n, SYSCALL_MAX_ARGS); -- 1.7.9.5

11 years, 11 months

[PATCH] tick: make sleep length calculation more accurate

by Daniel Lezcano

The sleep_length is computed in the tick_nohz_stop_sched_tick function but it is used later in the code with in between the local irq enabled. cpu_idle_loop tick_nohz_idle_enter [ exits with local irq enabled ] __tick_nohz_idle_enter tick_nohz_stop_sched_tick ... arch_cpu_idle menu_select [ uses here 'sleep_length' ] ... Between the computation of the sleep length and its usage, some interrupts can occur, making the sleep length shorter than actually it is. This patch fixes that by moving the sleep_length computation in the tick_nohz_get_sleep_length function and store the next_event for the device instead of the sleep_length. Signed-off-by: Daniel Lezcano <daniel.lezcano(a)linaro.org> --- include/linux/tick.h | 2 +- kernel/time/tick-sched.c | 5 +++-- 2 files changed, 4 insertions(+), 3 deletions(-) diff --git a/include/linux/tick.h b/include/linux/tick.h index 5128d33..4932004 100644 --- a/include/linux/tick.h +++ b/include/linux/tick.h @@ -67,7 +67,7 @@ struct tick_sched { ktime_t idle_exittime; ktime_t idle_sleeptime; ktime_t iowait_sleeptime; - ktime_t sleep_length; + ktime_t next_event; unsigned long last_jiffies; unsigned long next_jiffies; ktime_t idle_expires; diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c index 3612fc7..2007a7f 100644 --- a/kernel/time/tick-sched.c +++ b/kernel/time/tick-sched.c @@ -673,7 +673,7 @@ static ktime_t tick_nohz_stop_sched_tick(struct tick_sched *ts, out: ts->next_jiffies = next_jiffies; ts->last_jiffies = last_jiffies; - ts->sleep_length = ktime_sub(dev->next_event, now); + ts->next_event = dev->next_event; return ret; } @@ -837,8 +837,9 @@ void tick_nohz_irq_exit(void) ktime_t tick_nohz_get_sleep_length(void) { struct tick_sched *ts = &__get_cpu_var(tick_cpu_sched); + ktime_t now = ktime_get(); - return ts->sleep_length; + return ktime_sub(ts->next_event, now); } static void tick_nohz_restart(struct tick_sched *ts, ktime_t now) -- 1.7.9.5

11 years, 11 months

linus/master boot: 29 pass, 0 fail (v3.12-rc3-186-gc31eeac)

by Kevin Hilman build bot

Automated DT boot report for various ARM defconfigs. Boot test simply checks if kernel can boot to initramfs with busybox and run some basic commands (e.g. 'cat /proc/cpuinfo'). Tree/Branch: linus/master Git describe: v3.12-rc3-186-gc31eeac Commit: c31eeaced2 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net Full Report =========== arm-tegra_defconfig ------------------- tegra30-beaver PASS: 0 min 17.9 sec arm-omap2plus_defconfig ----------------------- am335x-boneblack PASS: 0 min 30.0 sec omap3-beagle-xm PASS: 0 min 51.8 sec am335x-bone PASS: 0 min 26.3 sec omap3-tobi,3530overo PASS: 0 min 42.7 sec omap4-panda PASS: 1 min 6.2 sec omap4-panda-es PASS: 1 min 12.8 sec omap3-tobi,3730storm PASS: 0 min 41.4 sec omap3-beagle PASS: 0 min 51.4 sec arm-imx_v6_v7_defconfig ----------------------- imx6dl-wandboard,wand-dual PASS: 0 min 16.5 sec imx6dl-wandboard,wand-solo PASS: 0 min 16.4 sec imx6q-wandboard PASS: 0 min 15.1 sec arm-multi_v7_defconfig ---------------------- tegra30-beaver PASS: 0 min 15.1 sec am335x-boneblack PASS: 0 min 34.6 sec omap3-beagle-xm PASS: 0 min 52.5 sec armada-370-mirabox PASS: 0 min 19.4 sec omap4-panda PASS: 1 min 4.4 sec omap4-panda-es PASS: 1 min 4.4 sec sun4i-a10-cubieboard PASS: 0 min 11.6 sec imx6dl-wandboard,wand-solo PASS: 0 min 16.3 sec omap3-tobi,3530overo PASS: 0 min 40.7 sec am335x-bone PASS: 0 min 33.4 sec imx6q-wandboard PASS: 0 min 15.7 sec omap3-tobi,3730storm PASS: 0 min 40.4 sec imx6dl-wandboard,wand-dual PASS: 0 min 16.6 sec omap3-beagle PASS: 0 min 49.2 sec arm-exynos_defconfig -------------------- exynos5250-arndale PASS: 0 min 30.0 sec arm-mvebu_defconfig ------------------- armada-370-mirabox PASS: 0 min 19.3 sec arm-sama5_defconfig ------------------- sama5d35ek PASS: 0 min 18.4 sec

11 years, 11 months

linus/master boot: 23 pass, 0 fail (v3.12-rc1-219-gb75ff5e)

by Kevin Hilman build bot

Automated DT boot report for various ARM defconfigs. Boot test simply checks if kernel can boot to initramfs with busybox and run some basic commands (e.g. 'cat /proc/cpuinfo'). Tree/Branch: linus/master Git describe: v3.12-rc1-219-gb75ff5e Commit: b75ff5e84b Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net Full Report =========== arm-imx_v6_v7_defconfig ----------------------- imx6dl-wandboard,wand-dual PASS: 0 min 16.4 sec imx6dl-wandboard,wand-solo PASS: 0 min 16.4 sec imx6q-wandboard PASS: 0 min 15.0 sec arm-omap2plus_defconfig ----------------------- omap3-beagle-xm PASS: 0 min 51.9 sec am335x-bone PASS: 0 min 26.4 sec omap3-tobi,3530overo PASS: 0 min 42.3 sec omap4-panda PASS: 1 min 2.2 sec omap4-panda-es PASS: 1 min 15.1 sec omap3-tobi,3730storm PASS: 0 min 44.4 sec omap3-beagle PASS: 0 min 51.1 sec arm-multi_v7_defconfig ---------------------- omap4-panda-es PASS: 1 min 14.0 sec omap3-beagle-xm PASS: 0 min 51.8 sec am335x-bone PASS: 0 min 33.4 sec sun4i-a10-cubieboard PASS: 0 min 11.6 sec imx6dl-wandboard,wand-solo PASS: 0 min 16.4 sec omap3-tobi,3530overo PASS: 0 min 40.7 sec omap4-panda PASS: 0 min 59.2 sec imx6q-wandboard PASS: 0 min 15.8 sec omap3-tobi,3730storm PASS: 0 min 40.4 sec imx6dl-wandboard,wand-dual PASS: 0 min 16.6 sec omap3-beagle PASS: 0 min 49.7 sec arm-exynos_defconfig -------------------- exynos5250-arndale PASS: 0 min 29.5 sec arm-sama5_defconfig ------------------- sama5d35ek PASS: 0 min 18.9 sec

11 years, 11 months

linus/master boot: 29 pass, 0 fail (v3.12-rc3-70-g517bf8f)

by Kevin Hilman build bot

Automated DT boot report for various ARM defconfigs. Boot test simply checks if kernel can boot to initramfs with busybox and run some basic commands (e.g. 'cat /proc/cpuinfo'). Tree/Branch: linus/master Git describe: v3.12-rc3-70-g517bf8f Commit: 517bf8fc21 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Full Report =========== arm-tegra_defconfig ------------------- tegra30-beaver PASS: 0 min 19.5 sec arm-omap2plus_defconfig ----------------------- am335x-boneblack PASS: 0 min 30.3 sec omap3-beagle-xm PASS: 0 min 51.9 sec am335x-bone PASS: 0 min 26.3 sec omap3-tobi,3530overo PASS: 0 min 42.5 sec omap4-panda PASS: 1 min 5.2 sec omap4-panda-es PASS: 1 min 8.8 sec omap3-tobi,3730storm PASS: 0 min 41.2 sec omap3-beagle PASS: 0 min 55.9 sec arm-imx_v6_v7_defconfig ----------------------- imx6dl-wandboard,wand-dual PASS: 0 min 16.4 sec imx6dl-wandboard,wand-solo PASS: 0 min 16.3 sec imx6q-wandboard PASS: 0 min 14.9 sec arm-multi_v7_defconfig ---------------------- tegra30-beaver PASS: 0 min 15.1 sec am335x-boneblack PASS: 0 min 34.6 sec omap3-beagle-xm PASS: 0 min 48.8 sec armada-370-mirabox PASS: 0 min 19.4 sec omap4-panda PASS: 0 min 59.3 sec omap4-panda-es PASS: 1 min 6.5 sec sun4i-a10-cubieboard PASS: 0 min 11.5 sec imx6dl-wandboard,wand-solo PASS: 0 min 16.5 sec omap3-tobi,3530overo PASS: 0 min 43.9 sec am335x-bone PASS: 0 min 33.4 sec imx6q-wandboard PASS: 0 min 15.6 sec omap3-tobi,3730storm PASS: 0 min 40.6 sec imx6dl-wandboard,wand-dual PASS: 0 min 16.5 sec omap3-beagle PASS: 0 min 53.8 sec arm-exynos_defconfig -------------------- exynos5250-arndale PASS: 0 min 30.0 sec arm-mvebu_defconfig ------------------- armada-370-mirabox PASS: 0 min 19.3 sec arm-sama5_defconfig ------------------- sama5d35ek PASS: 0 min 18.4 sec

11 years, 11 months

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