Steven Rostedt ed926f9b35 ftrace: Use counters to enable functions to trace ... Every function has its own record that stores the instruction pointer and flags for the function to be traced. There are only two flags: enabled and free. The enabled flag states that tracing for the function has been enabled (actively traced), and the free flag states that the record no longer points to a function and can be used by new functions (loaded modules). These flags are now moved to the MSB of the flags (actually just the top 32bits). The rest of the bits (30 bits) are now used as a ref counter. Everytime a tracer register functions to trace, those functions will have its counter incremented. When tracing is enabled, to determine if a function should be traced, the counter is examined, and if it is non-zero it is set to trace. When a ftrace_ops is registered to trace functions, its hashes are examined. If the ftrace_ops filter_hash count is zero, then all functions are set to be traced, otherwise only the functions in the hash are to be traced. The exception to this is if a function is also in the ftrace_ops notrace_hash. Then that function's counter is not incremented for this ftrace_ops. Signed-off-by: Steven Rostedt <rostedt@goodmis.org>		2011-05-18 15:29:47 -04:00
..
debug	Fix common misspellings	2011-03-31 11:26:23 -03:00
events	perf events: Clean up definitions and initializers, update copyrights	2011-05-04 08:49:24 +02:00
gcov	Merge branch 'trivial' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6	2011-03-20 18:14:55 -07:00
irq	genirq: Fix typo CONFIG_GENIRC_IRQ_SHOW_LEVEL	2011-05-02 21:16:37 +02:00
power	PM: Fix error code paths executed after failing syscore_suspend()	2011-04-18 23:58:59 +02:00
time	posix clocks: Replace mutex with reader/writer semaphore	2011-04-18 10:39:38 +02:00
trace	ftrace: Use counters to enable functions to trace	2011-05-18 15:29:47 -04:00
.gitignore
acct.c
async.c
audit.c	netlink: kill loginuid/sessionid/sid members from struct netlink_skb_parms	2011-03-03 10:55:40 -08:00
audit.h
audit_tree.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
audit_watch.c	kill path_lookup()	2011-03-14 09:15:23 -04:00
auditfilter.c	netlink: kill loginuid/sessionid/sid members from struct netlink_skb_parms	2011-03-03 10:55:40 -08:00
auditsc.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
backtracetest.c
bounds.c	memcg: remove direct page_cgroup-to-page pointer	2011-03-23 19:46:28 -07:00
capability.c	userns: make has_capability* into real functions	2011-03-23 19:47:06 -07:00
cgroup.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
cgroup_freezer.c
compat.c
configs.c
cpu.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
cpuset.c	cpuset: hold callback_mutex in cpuset_post_clone()	2011-03-23 19:46:35 -07:00
crash_dump.c	crash_dump: export is_kdump_kernel to modules, consolidate elfcorehdr_addr, setup_elfcorehdr and saved_max_pfn	2011-03-23 19:47:19 -07:00
cred.c	userns: security: make capabilities relative to the user namespace	2011-03-23 19:47:02 -07:00
delayacct.c
dma.c
elfcore.c
exec_domain.c
exit.c	ptrace: Prepare to fix racy accesses on task breakpoints	2011-04-25 17:28:24 +02:00
extable.c
fork.c	Merge branch 'for-2.6.39/core' of git://git.kernel.dk/linux-2.6-block	2011-03-24 10:16:26 -07:00
freezer.c
futex.c	futex: Set FLAGS_HAS_TIMEOUT during futex_wait restart setup	2011-04-15 16:34:32 +02:00
futex_compat.c	userns: user namespaces: convert several capable() calls	2011-03-23 19:47:08 -07:00
groups.c	userns: user namespaces: convert several capable() calls	2011-03-23 19:47:08 -07:00
hrtimer.c	hrtimer: Initialize CLOCK_ID to HRTIMER_BASE table statically	2011-04-29 10:57:11 +02:00
hung_task.c
irq_work.c
itimer.c
jump_label.c	jump label: Introduce static_branch() interface	2011-04-04 12:48:08 -04:00
kallsyms.c	Merge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2011-03-25 17:52:22 -07:00
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt
kexec.c	PM: Add missing syscore_suspend() and syscore_resume() calls	2011-04-20 00:36:11 +02:00
kfifo.c
kmod.c
kprobes.c
ksysfs.c
kthread.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
latencytop.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
lockdep.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
lockdep_internals.h
lockdep_proc.c	lockdep: Remove unused 'factor' variable from lockdep_stats_show()	2011-03-23 13:54:47 +01:00
lockdep_states.h
Makefile	hw breakpoints: Move to kernel/events/	2011-05-03 15:26:43 +02:00
module.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
mutex-debug.c
mutex-debug.h
mutex.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
mutex.h
notifier.c
ns_cgroup.c
nsproxy.c	userns: user namespaces: convert several capable() calls	2011-03-23 19:47:08 -07:00
padata.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
panic.c	move x86 specific oops=panic to generic code	2011-03-22 17:44:11 -07:00
params.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
pid.c	next_pidmap: fix overflow condition	2011-04-18 10:35:30 -07:00
pid_namespace.c	pidns: call pid_ns_prepare_proc() from create_pid_namespace()	2011-03-23 19:46:58 -07:00
pm_qos_params.c	PM QoS: Make pm_qos settings readable	2011-03-15 00:43:18 +01:00
posix-cpu-timers.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
posix-timers.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
printk.c	printk: allow setting DEFAULT_MESSAGE_LEVEL via Kconfig	2011-03-22 17:44:13 -07:00
profile.c
ptrace.c	ptrace: Prepare to fix racy accesses on task breakpoints	2011-04-25 17:28:24 +02:00
range.c
rcupdate.c	rcu: add comment saying why DEBUG_OBJECTS_RCU_HEAD depends on PREEMPT.	2011-03-04 08:05:41 -08:00
rcutiny.c
rcutiny_plugin.h	rcu: call __rcu_read_unlock() in exit_rcu for tiny RCU	2011-03-04 08:05:08 -08:00
rcutorture.c	rcutorture: Get rid of duplicate sched.h include	2011-03-04 08:05:17 -08:00
rcutree.c
rcutree.h
rcutree_plugin.h
rcutree_trace.c
relay.c
res_counter.c	memcg: res_counter_read_u64(): fix potential races on 32-bit machines	2011-03-23 19:46:22 -07:00
resource.c
rtmutex-debug.c
rtmutex-debug.h
rtmutex-tester.c	rtmutex: tester: Remove the remaining BKL leftovers	2011-02-22 22:07:22 +01:00
rtmutex.c
rtmutex.h
rtmutex_common.h
rwsem.c
sched.c	block: let io_schedule() flush the plug inline	2011-04-16 13:27:55 +02:00
sched_autogroup.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
sched_autogroup.h	sched, autogroup: Stop going ahead if autogroup is disabled	2011-02-23 11:33:59 +01:00
sched_clock.c
sched_cpupri.c
sched_cpupri.h
sched_debug.c
sched_fair.c	sched: Fix erroneous all_pinned logic	2011-04-11 11:08:54 +02:00
sched_features.h
sched_idletask.c	sched, doc: Update sched-design-CFS.txt	2011-03-23 14:09:41 +01:00
sched_rt.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
sched_stats.h
sched_stoptask.c	sched, doc: Update sched-design-CFS.txt	2011-03-23 14:09:41 +01:00
seccomp.c
semaphore.c
signal.c	signal.c: fix erroneous syscall kernel-doc	2011-04-08 11:05:24 -07:00
smp.c	smp: move smp setup functions to kernel/smp.c	2011-03-22 17:44:11 -07:00
softirq.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
spinlock.c
srcu.c
stacktrace.c
stop_machine.c	kthread: use kthread_create_on_node()	2011-03-22 17:44:01 -07:00
sys.c	userns: user namespaces: convert all capable checks in kernel/sys.c	2011-03-23 19:47:06 -07:00
sys_ni.c	vfs: Add open by file handle support	2011-03-15 02:21:44 -04:00
sysctl.c	sysctl: restrict write access to dmesg_restrict	2011-03-23 19:46:54 -07:00
sysctl_binary.c	open-style analog of vfs_path_lookup()	2011-03-14 09:15:28 -04:00
sysctl_check.c	sysctl_check: drop dead code	2011-03-23 19:46:51 -07:00
taskstats.c	taskstats: use appropriate printk priority level	2011-03-23 19:47:14 -07:00
test_kprobes.c
time.c	Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2011-03-15 18:53:35 -07:00
timeconst.pl
timer.c	Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2011-03-15 18:53:35 -07:00
tracepoint.c	jump label: Introduce static_branch() interface	2011-04-04 12:48:08 -04:00
tsacct.c
uid16.c	userns: user namespaces: convert several capable() calls	2011-03-23 19:47:08 -07:00
up.c
user-return-notifier.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
user.c	userns: add a user_namespace as creator/owner of uts_namespace	2011-03-23 19:46:59 -07:00
user_namespace.c
utsname.c	userns: allow sethostname in a container	2011-03-23 19:47:03 -07:00
utsname_sysctl.c
wait.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
watchdog.c	kernel/watchdog.c: disable nmi perf event in the error path of enabling watchdog	2011-04-28 11:28:21 -07:00
workqueue.c	workqueue: fix deadlock in worker_maybe_bind_and_lock()	2011-04-29 18:08:37 +02:00
workqueue_sched.h