Viresh Kumar
49a2a07514
hrtimer: Kick lowres dynticks targets on timer enqueue ...
In lowres mode, hrtimers are serviced by the tick instead of a clock
event. It works well as long as the tick stays periodic but we must also
make sure that the hrtimers are serviced in dynticks mode targets,
pretty much like timer list timers do.
Note that all dynticks modes are concerned: get_nohz_timer_target()
tries not to return remote idle CPUs but there is nothing to prevent
the elected target from entering dynticks idle mode until we lock its
base. It's also prefectly legal to enqueue hrtimers on full dynticks CPU.
So there are two requirements to correctly handle dynticks:
1) On target's tick stop time, we must not delay the next tick further
the next hrtimer.
2) On hrtimer queue time. If the tick of the target is stopped, we must
wake up that CPU such that it sees the new hrtimer and recalculate
the next tick accordingly.
The point 1 is well handled currently through get_nohz_timer_interrupt() and
cmp_next_hrtimer_event().
But the point 2 isn't handled at all.
Fixing this is easy though as we have the necessary API ready for that.
All we need is to call wake_up_nohz_cpu() on a target when a newly
enqueued hrtimer requires tick rescheduling, like timer list timer do.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/r/3d7ea08ce008698e26bd39fe10f55949391073ab.1403507178.git.viresh.kumar@linaro.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2014-06-23 11:23:47 +02:00
kdb: Use ktime_get_ts()
2014-06-12 16:18:45 +02:00
Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm into next
2014-06-05 15:57:04 -07:00
genirq: Improve documentation to match current implementation
2014-05-27 10:16:44 +02:00
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into next
2014-06-03 14:00:15 -07:00
Merge branches 'pnp', 'powercap', 'pm-runtime' and 'pm-opp'
2014-06-03 23:13:00 +02:00
kernel/printk: use symbolic defines for console loglevels
2014-06-04 16:54:17 -07:00
Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into next
2014-06-03 12:57:53 -07:00
numa,sched: fix load_to_imbalanced logic inversion
2014-06-08 14:35:05 -07:00
hrtimer: Kick lowres dynticks targets on timer enqueue
2014-06-23 11:23:47 +02:00
tracing: Use rcu_dereference_sched() for trace event triggers
2014-05-02 23:12:42 -04:00
acct: Use ktime_get_ts()
2014-06-12 16:18:44 +02:00
ipc, kernel: use Linux headers
2014-06-06 16:08:14 -07:00
audit: Use struct net not pid_t to remember the network namespce to reply in
2014-03-20 10:10:53 -04:00
inotify: Fix reporting of cookies for inotify events
2014-02-18 11:17:17 +01:00
inotify: Fix reporting of cookies for inotify events
2014-02-18 11:17:17 +01:00
Merge git://git.infradead.org/users/eparis/audit
2014-04-12 12:38:53 -07:00
Merge git://git.infradead.org/users/eparis/audit
2014-04-12 12:38:53 -07:00
kernel/backtracetest.c: replace no level printk by pr_info()
2014-06-04 16:54:14 -07:00
kernel/capability.c: code clean-up
2014-06-04 16:54:15 -07:00
kernfs: move the last knowledge of sysfs out from kernfs
2014-06-03 08:11:18 -07:00
cgroup: fix rcu_read_lock() leak in update_if_frozen()
2014-05-13 11:28:30 -04:00
kernel/compat.c: use sizeof() instead of sizeof
2014-06-04 16:54:19 -07:00
asmlinkage: Add explicit __visible to drivers/*, lib/*, kernel/*
2014-05-05 16:07:46 -07:00
kernel/cpu.c: convert printk to pr_foo()
2014-06-04 16:54:14 -07:00
mm: page_alloc: use jump labels to avoid checking number_of_cpusets
2014-06-04 16:54:08 -07:00
delayacct: Use ktime_get_ts()
2014-06-12 16:18:45 +02:00
kernel/exec_domain.c: code clean-up
2014-06-04 16:54:15 -07:00
signals: mv {dis,}allow_signal() from sched.h/exit.c to signal.[ch]
2014-06-06 16:08:11 -07:00
asmlinkage: Make main_extable_sort_needed visible
2014-02-13 18:13:22 -08:00
fork: Use ktime_get_ts()
2014-06-12 16:18:45 +02:00
Merge branch 'next' (accumulated 3.16 merge window patches) into master
2014-06-08 11:31:16 -07:00
compat: Get rid of (get|put)_compat_time(val|spec)
2014-02-02 14:09:12 -08:00
kernel/groups.c: remove return value of set_groups
2014-04-03 16:21:05 -07:00
kernel/hung_task.c: convert simple_strtoul to kstrtouint
2014-06-04 16:54:15 -07:00
perf/x86: Warn to early_printk() in case irq_work is too slow
2014-02-21 21:49:07 +01:00
kernel: use macros from compiler.h instead of __attribute__((...))
2014-04-07 16:36:11 -07:00
kernel/kexec.c: convert printk to pr_foo()
2014-06-06 16:08:12 -07:00
signals: change wait_for_helper() to use kernel_sigaction()
2014-06-06 16:08:12 -07:00
kobject: Make support for uevent_helper optional.
2014-04-25 12:00:49 -07:00
kthread: fix return value of kthread_create() upon SIGKILL.
2014-06-04 16:53:51 -07:00
kernel/latencytop.c: convert seq_printf to seq_puts
2014-06-04 16:54:15 -07:00
time/timers: Move all time(r) related files into kernel/time
2014-06-23 11:22:35 +02:00
Fixed one missing place for the new taint flag, and remove a warning
2014-05-01 10:35:01 -07:00
notifier: Substitute rcu_access_pointer() for rcu_dereference_raw()
2014-02-26 06:35:13 -08:00
kernel/panic.c: add "crash_kexec_post_notifiers" option for kdump after panic_notifers
2014-06-06 16:08:12 -07:00
pid_namespace: pidns_get() should check task_active_pid_ns() != NULL
2014-04-02 16:20:21 -07:00
kernel/profile.c: use static const char instead of static char
2014-06-06 16:08:13 -07:00
kernel/compat: convert to COMPAT_SYSCALL_DEFINE
2014-03-06 15:35:10 +01:00
kernel/reboot.c: convert simple_strtoul to kstrtoint
2014-06-04 16:54:15 -07:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2014-04-12 14:49:50 -07:00
kernel/res_counter.c: replace simple_strtoull by kstrtoull
2014-06-04 16:54:15 -07:00
resources: Clarify sanity check message
2014-05-23 10:47:21 -06:00
kernel/seccomp.c: kernel-doc warning fix
2014-06-06 16:08:15 -07:00
signals: introduce kernel_sigaction()
2014-06-06 16:08:12 -07:00
smp: print more useful debug info upon receiving IPI on an offline CPU
2014-06-06 16:08:12 -07:00
Merge branch 'rcu/next' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/rcu
2014-05-22 11:36:10 +02:00
kernel/stop_machine.c: kernel-doc warning fix
2014-06-04 16:54:15 -07:00
sched: Consolidate open coded implementations of nice level frobbing into nice_to_rlimit() and rlimit_to_nice()
2014-05-22 11:16:36 +02:00
sys_sgetmask/sys_ssetmask: add CONFIG_SGETMASK_SYSCALL
2014-06-04 16:54:14 -07:00
sysctl: convert use of typedef ctl_table to struct ctl_table
2014-06-06 16:08:16 -07:00
torture: Remove __init from torture_init_begin/end
2014-05-14 09:46:30 -07:00
kernel/tracepoint.c: kernel-doc fixes
2014-06-04 16:54:15 -07:00
tsacct: Use ktime_get_ts()
2014-06-12 16:18:45 +02:00
smp: Rename __smp_call_function_single() to smp_call_function_single_async()
2014-02-24 14:47:15 -08:00
kernel/user.c: drop unused field 'files' from user_struct
2014-06-04 16:54:16 -07:00
kernel/user_namespace.c: kernel-doc/checkpatch fixes
2014-06-06 16:08:13 -07:00
sysctl: convert use of typedef ctl_table to struct ctl_table
2014-06-06 16:08:16 -07:00
kernel/watchdog.c:touch_softlockup_watchdog(): use raw_cpu_write()
2014-04-18 16:40:08 -07:00
Linux 3.15-rc6
2014-05-22 10:28:56 +02:00
49a2a07514