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Peter Zijlstra 7bbba0eb1a perf/core: Fix perf_event_enable_on_exec() timekeeping (again) 
Where commit:

  7fce250915 ("perf: Fix scaling vs.  perf_event_enable_on_exec()")

disabled the ctx-time a-priory, such that all events get enabled and
scheduled at the time point in time, there is one hole in that patch,
when no events do get enabled nothing re-enables the ctx-time.

Reported-by: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com>
Reported-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Fixes: 7fce250915 ("perf: Fix scaling vs.  perf_event_enable_on_exec()")
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-02-24 08:56:32 +01:00
..
bpf
bpf: introduce BPF_F_ALLOW_OVERRIDE flag
2017-02-12 21:52:19 -05:00
configs
config: android: enable CONFIG_SECCOMP
2016-10-11 15:06:32 -07:00
debug
kdb: call vkdb_printf() from vprintk_default() only when wanted
2016-12-14 16:04:08 -08:00
events
perf/core: Fix perf_event_enable_on_exec() timekeeping (again)
2017-02-24 08:56:32 +01:00
gcov
…
irq
Merge tag 'iommu-updates-v4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
2017-02-20 16:42:43 -08:00
livepatch
…
locking
Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-02-20 13:23:30 -08:00
power
PM / sleep: Fix test_suspend after sleep state rework
2017-02-18 02:16:27 +01:00
printk
printk: use rcuidle console tracepoint
2017-02-18 17:27:00 -08:00
rcu
Merge branches 'doc.2017.01.15b', 'dyntick.2017.01.23a', 'fixes.2017.01.23a', 'srcu.2017.01.25a' and 'torture.2017.01.15b' into HEAD
2017-01-25 12:56:05 -08:00
sched
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-02-20 12:52:55 -08:00
time
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-02-20 12:52:55 -08:00
trace
tracing/kprobes: Fix __init annotation
2017-02-02 10:48:35 -05:00
.gitignore
…
acct.c
acct: Convert obsolete cputime type to nsecs
2017-02-01 09:13:51 +01:00
async.c
…
audit_fsnotify.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-12-17 18:44:00 -08:00
audit_tree.c
Merge branch 'stable-4.10' of git://git.infradead.org/users/pcmoore/audit
2017-01-05 23:06:06 -08:00
audit_watch.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-12-17 18:44:00 -08:00
audit.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-12-17 18:44:00 -08:00
audit.h
audit_log_{name,link_denied}: constify struct path
2016-12-05 19:00:38 -05:00
auditfilter.c
audit: add support for session ID user filter
2016-11-29 15:10:12 -05:00
auditsc.c
Merge branch 'stable-4.10' of git://git.infradead.org/users/pcmoore/audit
2016-12-14 14:06:40 -08:00
backtracetest.c
…
bounds.c
…
capability.c
capability: export has_capability
2017-01-12 07:01:56 -07:00
cgroup_freezer.c
…
cgroup_pids.c
…
cgroup.c
bpf: introduce BPF_F_ALLOW_OVERRIDE flag
2017-02-12 21:52:19 -05:00
compat.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
configs.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
context_tracking.c
…
cpu_pm.c
…
cpu.c
cpu/hotplug: Remove unused but set variable in _cpu_down()
2017-01-18 11:55:09 +01:00
cpuset.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
crash_dump.c
…
cred.c
…
delayacct.c
delaycct: Convert obsolete cputime type to nsecs
2017-02-01 09:13:52 +01:00
dma.c
…
elfcore.c
…
exec_domain.c
…
exit.c
Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-02-20 13:23:30 -08:00
extable.c
kprobes, extable: Identify kprobes trampolines as kernel text area
2017-01-14 08:38:05 +01:00
fork.c
Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-02-20 13:23:30 -08:00
freezer.c
…
futex_compat.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
futex.c
futex: Move futex_init() to core_initcall
2017-02-13 16:12:22 +01:00
groups.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
hung_task.c
hung_task: decrement sysctl_hung_task_warnings only if it is positive
2016-12-12 18:55:09 -08:00
irq_work.c
…
jump_label.c
jump_labels: API for flushing deferred jump label updates
2017-01-12 14:33:16 +01:00
kallsyms.c
…
kcmp.c
…
Kconfig.freezer
…
Kconfig.hz
…
Kconfig.locks
locking/mutex: Allow MUTEX_SPIN_ON_OWNER when DEBUG_MUTEXES
2016-10-25 11:31:51 +02:00
Kconfig.preempt
…
kcov.c
kcov: make kcov work properly with KASLR enabled
2016-12-20 09:48:47 -08:00
kexec_core.c
kexec: add cond_resched into kimage_alloc_crash_control_pages
2016-12-14 16:04:07 -08:00
kexec_file.c
ima: on soft reboot, save the measurement list
2016-12-20 09:48:44 -08:00
kexec_internal.h
kexec_file: Allow arch-specific memory walking for kexec_add_buffer
2016-11-30 23:14:57 +11:00
kexec.c
…
kmod.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
kprobes.c
kprobes, extable: Identify kprobes trampolines as kernel text area
2017-01-14 08:38:05 +01:00
ksysfs.c
…
kthread.c
time: Remove CONFIG_TIMER_STATS
2017-02-10 11:15:08 +01:00
latencytop.c
…
Makefile
Merge branch 'akpm' (patches from Andrew)
2016-12-14 17:25:18 -08:00
membarrier.c
Fix: Disable sys_membarrier when nohz_full is enabled
2017-01-23 11:32:16 -08:00
memremap.c
mm: fix devm_memremap_pages crash, use mem_hotplug_{begin, done}
2017-01-10 18:31:54 -08:00
module_signing.c
…
module-internal.h
…
module.c
modversions: treat symbol CRCs as 32 bit quantities
2017-02-03 08:28:25 -08:00
notifier.c
…
nsproxy.c
…
padata.c
padata: Remove unused but set variables
2016-10-25 11:08:10 +08:00
panic.c
kernel/panic.c: add missing \n
2017-01-24 16:26:14 -08:00
params.c
…
pid_namespace.c
pid: fix lockdep deadlock warning due to ucount_lock
2017-01-10 13:34:56 +13:00
pid.c
locking/atomic, kref: Add KREF_INIT()
2017-01-14 11:37:18 +01:00
profile.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
ptrace.c
ptrace: Don't allow accessing an undumpable mm
2016-11-22 12:57:38 -06:00
range.c
…
reboot.c
…
relay.c
relay: check array offset before using it
2016-12-14 16:04:08 -08:00
resource.c
…
seccomp.c
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
2016-12-14 13:57:44 -08:00
signal.c
signal: Convert obsolete cputime type to nsecs
2017-02-01 09:13:53 +01:00
smp.c
kernel/smp: Tell the user we're bringing up secondary CPUs
2016-10-26 12:02:35 +02:00
smpboot.c
kthread/smpboot: do not park in kthread_create_on_cpu()
2016-10-11 15:06:33 -07:00
smpboot.h
…
softirq.c
softirq: Display IRQ_POLL for irq-poll statistics
2016-10-21 15:45:47 -06:00
stacktrace.c
stacktrace, lockdep: Fix address, newline ugliness
2017-02-08 08:21:31 +01:00
stop_machine.c
locking/core, stop_machine: Yield the CPU during stop machine()
2016-11-16 10:15:09 +01:00
sys_ni.c
move aio compat to fs/aio.c
2016-12-22 22:58:37 -05:00
sys.c
sched/cputime: Convert task/group cputime to nsecs
2017-02-01 09:13:49 +01:00
sysctl_binary.c
sysctl: add KERN_CONT to deprecated_sysctl_warning()
2016-12-14 16:04:07 -08:00
sysctl.c
sched/rt: Show the 'sched_rr_timeslice' SCHED_RR timeslice tuning knob in milliseconds
2017-02-01 11:01:30 +01:00
task_work.c
…
taskstats.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2016-11-15 10:54:36 -05:00
test_kprobes.c
…
torture.c
…
tracepoint.c
tracing: Have the reg function allow to fail
2016-12-09 09:13:30 -05:00
tsacct.c
tsacct: Convert obsolete cputime type to nsecs
2017-02-01 09:13:52 +01:00
ucount.c
kernel/ucount.c: mark user_header with kmemleak_ignore()
2017-02-08 15:41:43 -08:00
uid16.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
up.c
…
user_namespace.c
Merge branch 'nsfs-ioctls' into HEAD
2016-09-22 20:00:36 -05:00
user-return-notifier.c
…
user.c
…
utsname_sysctl.c
…
utsname.c
Merge branch 'nsfs-ioctls' into HEAD
2016-09-22 20:00:36 -05:00
watchdog_hld.c
kernel/watchdog: prevent false hardlockup on overloaded system
2017-01-24 16:26:14 -08:00
watchdog.c
kernel/watchdog: prevent false hardlockup on overloaded system
2017-01-24 16:26:14 -08:00
workqueue_internal.h
…
workqueue.c
time: Remove CONFIG_TIMER_STATS
2017-02-10 11:15:08 +01:00