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Alexander Shishkin fe45bafbd0 perf/core: Don't re-schedule CPU flexible events needlessly 
In the sched-in path, we first remove a CPU's flexible events in order to
give priority to the task's pinned events. However, this step can be safely
skipped if the task doesn't have its own pinned events.

This patch implements this skipping.

Reported-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
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>
Cc: vince@deater.net
Link: http://lkml.kernel.org/r/20170119164330.22887-2-alexander.shishkin@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-30 12:01:14 +01:00
..
bpf
bpf: don't trigger OOM killer under pressure with map alloc
2017-01-18 17:12:26 -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: Don't re-schedule CPU flexible events needlessly
2017-01-30 12:01:14 +01:00
gcov
gcov: add support for gcc version >= 6
2016-07-15 14:54:27 +09:00
irq
genirq/affinity: Fix node generation from cpumask
2016-12-15 12:32:35 +01:00
livepatch
livepatch/module: make TAINT_LIVEPATCH module-specific
2016-08-26 14:42:08 +02:00
locking
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
power
Merge branches 'pm-sleep' and 'pm-cpufreq'
2017-01-27 00:08:59 +01:00
printk
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
rcu
rcu: Narrow early boot window of illegal synchronous grace periods
2017-01-14 21:23:48 -08:00
sched
ktime: Cleanup ktime_set() usage
2016-12-25 17:21:22 +01:00
time
nohz: Fix collision between tick and other hrtimers
2017-01-11 10:41:33 +01:00
trace
clocksource: Use a plain u64 instead of cycle_t
2016-12-25 11:04:12 +01:00
.gitignore
…
acct.c
…
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: Use lld instead of ld when printing pids controller events_limit
2016-06-21 15:03:36 -04:00
cgroup.c
cgroup: add support for eBPF programs
2016-11-25 16:25:52 -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
cred: Reject inodes with invalid ids in set_create_file_as()
2016-06-30 18:05:09 -05:00
delayacct.c
…
dma.c
…
elfcore.c
…
exec_domain.c
…
exit.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
extable.c
kprobes, extable: Identify kprobes trampolines as kernel text area
2017-01-14 08:38:05 +01:00
fork.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
freezer.c
freezer, oom: check TIF_MEMDIE on the correct task
2016-07-28 16:07:41 -07:00
futex_compat.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
futex.c
ktime: Get rid of the union
2016-12-25 17:21:22 +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
kexec: allow architectures to override boot mapping
2016-08-02 19:35:27 -04:00
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
kexec: add a kexec_crash_loaded() function
2016-08-02 19:35:30 -04:00
kthread.c
kthread: add __printf attributes
2016-12-12 18:55:06 -08:00
latencytop.c
…
Makefile
Merge branch 'akpm' (patches from Andrew)
2016-12-14 17:25:18 -08:00
membarrier.c
…
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
taint/module: Fix problems when out-of-kernel driver defines true or false
2017-01-17 10:56:45 -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
remove lots of IS_ERR_VALUE abuses
2016-05-27 15:26:11 -07:00
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: protect SIGNAL_UNKILLABLE from unintentional clearing.
2017-01-10 18:31:55 -08:00
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
…
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
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
sysctl_binary.c
sysctl: add KERN_CONT to deprecated_sysctl_warning()
2016-12-14 16:04:07 -08:00
sysctl.c
sysctl: fix proc_doulongvec_ms_jiffies_minmax()
2017-01-26 09:21:24 -08:00
task_work.c
task_work: use READ_ONCE/lockless_dereference, avoid pi_lock if !task_works
2016-08-02 19:35:02 -04:00
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
torture: Convert torture_shutdown() to hrtimer
2016-08-22 10:01:49 -07:00
tracepoint.c
tracing: Have the reg function allow to fail
2016-12-09 09:13:30 -05:00
tsacct.c
…
ucount.c
userns: Make ucounts lock irq-safe
2017-01-24 06:23:51 +13:00
uid16.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
up.c
smp: Add function to execute a function synchronously on a CPU
2016-09-05 13:52:39 +02:00
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
Merge branch 'for-4.9' into for-4.10
2016-10-19 12:12:40 -04:00