Peter Zijlstra 898386b287 BACKPORT: perf: Fix event->ctx locking ... There have been a few reported issues wrt. the lack of locking around changing event->ctx. This patch tries to address those. It avoids the whole rwsem thing; and while it appears to work, please give it some thought in review. What I did fail at is sensible runtime checks on the use of event->ctx, the RCU use makes it very hard. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: http://lkml.kernel.org/r/20150123125834.209535886@infradead.org Signed-off-by: Ingo Molnar <mingo@kernel.org> (cherry picked from commit f63a8daa5812afef4f06c962351687e1ff9ccb2b) Bug: 30955111 Bug: 31095224 Change-Id: I8dfc0aae8d1206c177454e0093dacd82b6129c55 Signed-off-by: Joao Dias <joaodias@google.com>		2018-01-13 17:13:44 +03:00
..
debug	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
events	BACKPORT: perf: Fix event->ctx locking	2018-01-13 17:13:44 +03:00
gcov
irq	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
power	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
sched	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
time	sched_clock: Avoid corrupting hrtimer tree during suspend	2018-01-02 22:36:45 +03:00
trace	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
.gitignore	kernel/hz.bc: ignore.	2016-10-29 23:12:15 +08:00
acct.c
async.c
audit.c	audit: wait_for_auditd() should use TASK_UNINTERRUPTIBLE	2014-04-14 06:44:15 -07:00
audit.h
audit_tree.c	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
audit_watch.c	get rid of kern_path_parent()	2017-09-22 19:11:54 +03:00
auditfilter.c
auditsc.c	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
backtracetest.c
bounds.c
capability.c
cgroup.c	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
cgroup_freezer.c	cgroup: cgroup_subsys->fork() should be called after the task is added to css_set	2014-03-11 16:10:03 -07:00
compat.c
configs.c
cpu.c	CPU hotplug: Provide lockless versions of callback registration functions	2018-01-01 21:26:45 +03:00
cpu_pm.c
cpuset.c	cpuset: PF_SPREAD_PAGE and PF_SPREAD_SLAB should be atomic flags	2014-12-01 18:02:38 +08:00
crash_dump.c
cred.c
delayacct.c
dma.c
elfcore.c
exec_domain.c	ANDROID: exec_domains: Disable request_module() call for personalities	2017-12-27 22:46:26 +03:00
exit.c	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
extable.c
fork.c	seccomp: Replace BUG(!spin_is_locked()) with assert_spin_lock	2017-12-27 22:42:09 +03:00
freezer.c	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
futex.c	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
futex_compat.c	futex: Revert "futex: Mark get_robust_list as deprecated"	2013-02-28 06:59:01 -08:00
groups.c
hrtimer.c	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
hung_task.c
irq_work.c
itimer.c
jump_label.c
kallsyms.c
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt
kexec.c
kfifo.c
kmod.c	usermodehelper: check subprocess_info->path != NULL	2013-05-19 10:54:50 -07:00
kprobes.c
ksysfs.c	rcu: Add a module parameter to force use of expedited RCU primitives	2016-10-29 23:12:17 +08:00
kthread.c	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
latencytop.c
lglock.c	brlocks/lglocks: turn into functions	2015-07-13 11:17:40 -07:00
lockdep.c	lockdep: remove task argument from debug_check_no_locks_held	2013-07-12 14:22:56 -07:00
lockdep_internals.h
lockdep_proc.c
lockdep_states.h
Makefile	hotplug: Fix UP bug in smpboot hotplug code	2016-10-29 23:12:39 +08:00
module.c	module: Fix locking in symbol_put_addr()	2016-04-27 18:55:19 +08:00
mutex-debug.c
mutex-debug.h
mutex.c
mutex.h
notifier.c
nsproxy.c	userns: make each net (net_ns) belong to a user_ns	2017-09-01 13:38:07 +03:00
padata.c
panic.c	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
params.c
pid.c	BACKPORT: FROMLIST: pids: make task_tgid_nr_ns() safe	2018-01-13 17:13:41 +03:00
pid_namespace.c	proc: Usable inode numbers for the namespace file descriptors.	2015-07-13 11:18:01 -07:00
posix-cpu-timers.c	posix-cpu-timers: Fix nanosleep task_struct leak	2013-02-28 06:58:59 -08:00
posix-timers.c	posix-timers: Fix stack info leak in timer_create()	2015-02-02 17:05:05 +08:00
printk.c	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
profile.c
ptrace.c	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
range.c
rcu.h	rcu: Add a module parameter to force use of expedited RCU primitives	2016-10-29 23:12:17 +08:00
rcupdate.c	rcu: Make exit_rcu() more precise and consolidate	2016-10-29 23:12:17 +08:00
rcutiny.c	rcu: Correctly handle non-empty Tiny RCU callback list with none ready	2015-10-22 09:20:02 +08:00
rcutiny_plugin.h	rcu: Make exit_rcu() more precise and consolidate	2016-10-29 23:12:17 +08:00
rcutorture.c
rcutree.c	rcu: Use smp_hotplug_thread facility for RCUs per-CPU kthread	2016-10-29 23:12:39 +08:00
rcutree.h	rcu: Use smp_hotplug_thread facility for RCUs per-CPU kthread	2016-10-29 23:12:39 +08:00
rcutree_plugin.h	rcu: Use smp_hotplug_thread facility for RCUs per-CPU kthread	2016-10-29 23:12:39 +08:00
rcutree_trace.c	rcu: Use smp_hotplug_thread facility for RCUs per-CPU kthread	2016-10-29 23:12:39 +08:00
relay.c
res_counter.c
resource.c	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
rtmutex-debug.c
rtmutex-debug.h	rtmutex: Handle deadlock detection smarter	2014-07-17 15:39:50 -07:00
rtmutex-tester.c
rtmutex.c	rtmutex: Plug slow unlock race	2014-07-17 15:39:50 -07:00
rtmutex.h	rtmutex: Handle deadlock detection smarter	2014-07-17 15:39:50 -07:00
rtmutex_common.h
rwsem.c
seccomp.c	seccomp: Replace BUG(!spin_is_locked()) with assert_spin_lock	2017-12-27 22:42:09 +03:00
semaphore.c
signal.c	BACKPORT: signal: allow to send any siginfo to itself	2017-12-27 22:49:08 +03:00
smp.c	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
smpboot.c	smpboot: use kmemleak_not_leak for smpboot_thread_data	2016-10-29 23:12:40 +08:00
smpboot.h	smpboot: Provide infrastructure for percpu hotplug threads	2016-10-29 23:12:39 +08:00
softirq.c	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
spinlock.c
srcu.c
stacktrace.c
stop_machine.c	stop_machine: Mark per cpu stopper enabled early	2016-10-29 23:12:39 +08:00
sys.c	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
sys_ni.c	seccomp: add "seccomp" syscall	2014-10-31 19:46:27 -07:00
sysctl.c	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
sysctl_binary.c	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
taskstats.c
test_kprobes.c
time.c	jiffies: Fix timeval conversion to jiffies	2016-10-29 23:12:15 +08:00
timeconst.bc	kernel: Replace timeconst.pl with a bc script	2016-10-29 23:12:15 +08:00
timer.c	tick: Upstream fixes	2017-08-25 20:00:22 +03:00
tracepoint.c	tracepoint: Do not waste memory on mods with no tracepoints	2014-05-18 05:25:56 -07:00
tsacct.c
uid16.c
up.c
user-return-notifier.c
user.c	proc: Usable inode numbers for the namespace file descriptors.	2015-07-13 11:18:01 -07:00
user_namespace.c	proc: Usable inode numbers for the namespace file descriptors.	2015-07-13 11:18:01 -07:00
utsname.c	proc: Usable inode numbers for the namespace file descriptors.	2015-07-13 11:18:01 -07:00
utsname_sysctl.c
wait.c
watchdog.c	kernel/watchdog.c: touch_nmi_watchdog should only touch local cpu not every one	2016-03-21 09:17:57 +08:00
workqueue.c	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
workqueue_sched.h