Frederic Weisbecker
48d68b20d0
tracing/function-graph-tracer: support for x86-64 ...
Impact: extend and enable the function graph tracer to 64-bit x86
This patch implements the support for function graph tracer under x86-64.
Both static and dynamic tracing are supported.
This causes some small CPP conditional asm on arch/x86/kernel/ftrace.c I
wanted to use probe_kernel_read/write to make the return address
saving/patching code more generic but it causes tracing recursion.
That would be perhaps useful to implement a notrace version of these
function for other archs ports.
Note that arch/x86/process_64.c is not traced, as in X86-32. I first
thought __switch_to() was responsible of crashes during tracing because I
believed current task were changed inside but that's actually not the
case (actually yes, but not the "current" pointer).
So I will have to investigate to find the functions that harm here, to
enable tracing of the other functions inside (but there is no issue at
this time, while process_64.c stays out of -pg flags).
A little possible race condition is fixed inside this patch too. When the
tracer allocate a return stack dynamically, the current depth is not
initialized before but after. An interrupt could occur at this time and,
after seeing that the return stack is allocated, the tracer could try to
trace it with a random uninitialized depth. It's a prevention, even if I
hadn't problems with it.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Tim Bird <tim.bird@am.sony.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-12-02 09:47:48 +01:00
irq: make variable static
2008-10-22 07:37:17 +02:00
tracing: allow tracing of suspend/resume & hibernation code again
2008-11-23 10:48:44 +01:00
nohz: disable tick_nohz_kick_tick() for now
2008-11-10 22:39:27 +01:00
tracing/function-graph-tracer: support for x86-64
2008-12-02 09:47:48 +01:00
tty: Fix abusers of current->sighand->tty
2008-10-13 09:51:42 -07:00
[PATCH] Fix the bug of using AUDIT_STATUS_RATE_LIMIT when set fail, no error output.
2008-08-01 12:15:16 -04:00
Fix inotify watch removal/umount races
2008-11-15 12:26:44 -08:00
Fix inotify watch removal/umount races
2008-11-15 12:26:44 -08:00
tty: Fix abusers of current->sighand->tty
2008-10-13 09:51:42 -07:00
backtrace: replace timer with tasklet + completions
2008-06-27 18:09:16 +02:00
security: Fix setting of PF_SUPERPRIV by __capable()
2008-08-14 22:59:43 +10:00
cgroups: fix a serious bug in cgroupstats
2008-11-19 18:50:00 -08:00
cgroups: fix probable race with put_css_set[_taskexit] and find_css_set
2008-10-20 08:52:38 -07:00
freezer_cg: disable writing freezer.state of root cgroup
2008-11-12 17:17:16 -08:00
Merge branches 'timers/clocksource', 'timers/hrtimers', 'timers/nohz', 'timers/ntp', 'timers/posixtimers' and 'timers/debug' into v28-timers-for-linus
2008-10-20 13:14:06 +02:00
kernel/configs.c: remove useless comments
2008-10-20 08:52:34 -07:00
cpumask: introduce new API, without changing anything
2008-11-06 09:05:33 +01:00
cpuset: update top cpuset's mems after adding a node
2008-11-19 18:49:58 -08:00
per-task-delay-accounting: update taskstats for memory reclaim delay
2008-07-25 10:53:47 -07:00
dma-coherent: export dma_[alloc|release]_from_coherent methods
2008-08-22 08:34:53 +02:00
kernel/dma.c: remove a CVS keyword
2008-10-16 11:21:30 -07:00
proc: move /proc/execdomains to kernel/exec_domain.c
2008-10-23 14:30:41 +04:00
tracing/function-return-tracer: free the return stack on free_task()
2008-11-23 22:34:02 +01:00
tracing/function-return-tracer: change the name into function-graph-tracer
2008-11-26 01:59:45 +01:00
freezer_cg: use thaw_process() in unfreeze_cgroup()
2008-10-30 11:38:45 -07:00
hrtimer: make the futex() system call use the per process slack value
2008-09-11 07:17:00 -07:00
hrtimer: clean up unused callback modes
2008-11-12 09:54:40 +01:00
timers: fix itimer/many thread hang
2008-09-14 16:25:35 +02:00
sprint_symbol(): use less stack
2008-11-19 18:49:58 -08:00
container freezer: implement freezer cgroup subsystem
2008-10-20 08:52:34 -07:00
sched: fix SCHED_HRTICK dependency
2008-07-28 14:37:38 +02:00
kexec: fix crash_save_vmcoreinfo_init build problem
2008-10-20 15:28:50 -07:00
kgdb: call touch_softlockup_watchdog on resume
2008-10-06 13:50:59 -05:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus
2008-10-16 12:38:34 -07:00
kernel/kprobes.c: don't pad kretprobe_table_locks[] on uniprocessor builds
2008-11-12 17:17:17 -08:00
profiling: dynamically enable readprofile at runtime
2008-10-16 11:21:31 -07:00
tracepoints: add DECLARE_TRACE() and DEFINE_TRACE()
2008-11-16 09:01:36 +01:00
lockdep: fix irqs on/off ip tracing
2008-10-28 11:19:07 +01:00
lockdep: build fix
2008-08-13 12:55:10 +02:00
lockstat: fix numerical output rounding error
2008-08-26 10:37:46 +02:00
tracing/function-return-tracer: change the name into function-graph-tracer
2008-11-26 01:59:45 +01:00
markers/tracpoints: fix non-modular build
2008-11-16 09:52:03 +01:00
Merge branches 'tracing/branch-tracer', 'tracing/ftrace', 'tracing/function-return-tracer', 'tracing/tracepoints' and 'tracing/urgent' into tracing/core
2008-11-17 09:36:22 +01:00
locking: fix mutex @key parameter kernel-doc notation
2008-07-28 18:12:36 +02:00
ftrace: ignore functions that cannot be kprobe-ed
2008-10-14 10:34:22 +02:00
cgroup_clone: use pid of newly created task for new cgroup
2008-07-25 10:53:37 -07:00
removed unused #include <linux/version.h>'s
2008-08-23 12:14:12 -07:00
Make panic= and panic_on_oops into core_params
2008-10-22 10:00:25 +11:00
Fix compile warning in kernel/params.c
2008-10-23 12:09:00 -07:00
pidns: remove now unused find_pid function.
2008-07-25 10:53:45 -07:00
pid_ns: (BUG 11391) change ->child_reaper when init->group_leader exits
2008-09-02 19:21:38 -07:00
pm_qos_requirement might sleep
2008-09-02 19:21:40 -07:00
sched, signals: fix the racy usage of ->signal in account_group_xxx/run_posix_cpu_timers
2008-11-17 16:49:35 +01:00
Merge branch 'timers/range-hrtimers' into v28-range-hrtimers-for-linus-v2
2008-10-22 09:48:06 +02:00
printk: remove unused code from kernel/printk.c
2008-10-23 21:54:29 +02:00
profiling: clean up profile_nop()
2008-11-19 10:19:16 +01:00
make ptrace_untrace() static
2008-10-20 08:52:39 -07:00
rcu: RCU-based detection of stalled CPUs for Classic RCU, fix
2008-10-03 10:41:00 +02:00
rcupdate: fix bug of rcu_barrier*()
2008-10-21 15:59:53 +02:00
byteorder: remove direct includes of linux/byteorder/swab[b].h
2008-10-20 08:52:40 -07:00
rcu: trace fix possible mem-leak
2008-08-15 17:54:40 +02:00
byteorder: remove direct includes of linux/byteorder/swab[b].h
2008-10-20 12:51:53 -07:00
relay: fix cpu offline problem
2008-11-18 15:08:56 +01:00
cgroup files: convert res_counter_write() to be a cgroups write_string() handler
2008-07-25 10:53:36 -07:00
reserve_region_with_split: Fix GFP_KERNEL usage under spinlock
2008-11-01 09:53:58 -07:00
sysdev: Pass the attribute to the low level sysdev show/store function
2008-07-21 21:55:02 -07:00
hrtimer: convert kernel/* to the new hrtimer apis
2008-09-05 21:35:13 -07:00
tracing/function-return-tracer: change the name into function-graph-tracer
2008-11-26 01:59:45 +01:00
sched_clock: prevent scd->clock from moving backwards
2008-10-10 11:17:04 +02:00
sched: fix kernel warning on /proc/sched_debug access
2008-11-16 08:07:15 +01:00
sched: release buddies on yield
2008-11-11 11:57:22 +01:00
sched: backward looking buddy
2008-11-05 10:30:14 +01:00
sched: add CONFIG_SMP consistency
2008-10-22 10:01:52 +02:00
Merge commit 'v2.6.28-rc1' into sched/urgent
2008-10-24 12:48:46 +02:00
sched, signals: fix the racy usage of ->signal in account_group_xxx/run_posix_cpu_timers
2008-11-17 16:49:35 +01:00
semaphore: __down_common: use signal_pending_state()
2008-08-05 14:33:47 -07:00
tracepoints: add DECLARE_TRACE() and DEFINE_TRACE()
2008-11-16 09:01:36 +01:00
generic-ipi: fix the smp_mb() placement
2008-11-06 08:41:56 +01:00
irq: call __irq_enter() before calling the tick_idle_check
2008-11-10 22:36:39 +01:00
Make the taint flags reliable
2008-10-16 11:21:31 -07:00
lockdep: spin_lock_nest_lock(), checkpatch fixes
2008-08-13 13:56:51 +02:00
stacktrace: fix modular build, export print_stack_trace and save_stack_trace
2008-06-30 09:20:55 +02:00
stop_machine: fix race with return value (fixes Bug #11989 )
2008-11-16 15:09:52 -08:00
Merge branch 'timers/range-hrtimers' into v28-range-hrtimers-for-linus-v2
2008-10-22 09:48:06 +02:00
reintroduce accept4
2008-11-19 18:49:57 -08:00
ftrace: sysctl typo
2008-11-04 13:04:40 +01:00
sysctl: check for bogus modes
2008-07-25 10:53:45 -07:00
taskstats: remove initialization of static per-cpu variable
2008-07-25 10:53:47 -07:00
select: add a timespec_add_safe() function
2008-09-05 21:34:57 -07:00
Add round_jiffies_up and related routines
2008-11-06 08:42:48 +01:00
markers/tracpoints: fix non-modular build
2008-11-16 09:52:03 +01:00
task IO accounting: move all IO statistics in struct task_io_accounting
2008-07-27 16:12:28 -07:00
sched: rt-bandwidth for user grouping interface
2008-08-19 13:10:09 +02:00
removed unused #include <linux/version.h>'s
2008-08-23 12:14:12 -07:00
removed unused #include <linux/version.h>'s
2008-08-23 12:14:12 -07:00
sysctl: simplify ->strategy
2008-10-16 11:21:47 -07:00
wait: kill is_sync_wait()
2008-10-16 11:21:31 -07:00
cpumask: introduce new API, without changing anything
2008-11-06 09:05:33 +01:00
48d68b20d0