linux/kernel/trace
Steven Rostedt 179c498ae2 function-graph: only allocate init tasks if it was not already done
When the function graph tracer is enabled, it calls the initialization
needed for the init tasks that would be called on all created tasks.

The problem is that this is called every time the function graph tracer
is enabled, and the ret_stack is allocated for the idle tasks each time.
Thus, the old ret_stack is lost and a memory leak is created.

This is also dangerous because if an interrupt happened on another CPU
with the init task and the ret_stack is replaced, we then lose all the
return pointers for the interrupt, and a crash would take place.

[ Impact: fix memory leak and possible crash due to race ]

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2009-06-02 12:03:19 -04:00
..
blktrace.c blktrace: pass the right pointer to kfree() 2009-04-09 05:52:40 +02:00
events.c ftrace: event profile hooks 2009-03-20 10:17:07 +01:00
ftrace.c function-graph: only allocate init tasks if it was not already done 2009-06-02 12:03:19 -04:00
Kconfig tracing: fix document references 2009-04-10 13:08:50 +02:00
kmemtrace.c kmemtrace: small cleanups 2009-04-03 12:23:09 +02:00
Makefile tracing: add per-event filtering 2009-03-22 18:38:46 +01:00
ring_buffer.c ring-buffer: do not remove reader page from list on ring buffer free 2009-04-01 14:47:53 +02:00
trace_boot.c tracing: Introduce trace_buffer_{lock_reserve,unlock_commit} 2009-02-06 01:01:41 +01:00
trace_branch.c tracing: Fix branch tracer header 2009-04-14 02:30:36 +02:00
trace_clock.c tracing: fix four sparse warnings 2009-03-22 18:16:54 +01:00
trace_event_profile.c ftrace: event profile hooks 2009-03-20 10:17:07 +01:00
trace_event_types.h tracing: remove recording function depth from trace_printk 2009-03-19 15:58:47 -04:00
trace_events_filter.c tracing/filters: return proper error code when writing filter file 2009-04-12 11:59:29 +02:00
trace_events_stage_1.h tracing: update comments to match event code macros 2009-03-10 13:12:58 -04:00
trace_events_stage_2.h ftrace: Output REC->var instead of __entry->var for trace format 2009-04-10 15:48:53 +02:00
trace_events_stage_3.h tracing/events: don't discard an event after commit 2009-03-23 09:22:15 +01:00
trace_events.c tracing/filters: return proper error code when writing filter file 2009-04-12 11:59:29 +02:00
trace_export.c ftrace: Correct a text align for event format output 2009-04-07 14:02:42 +02:00
trace_functions_graph.c function-graph: moved the timestamp from arch to generic code 2009-03-24 09:31:34 -04:00
trace_functions.c tracing/core: use appropriate waiting on trace_pipe 2009-02-18 01:40:20 +01:00
trace_hw_branches.c tracing/hw-branch-tracing: convert bts-tracer mutex to a spinlock 2009-02-25 09:16:01 +01:00
trace_irqsoff.c tracing: have latency tracers set the latency format 2009-03-04 22:15:30 -05:00
trace_mmiotrace.c tracing: remove recording function depth from trace_printk 2009-03-19 15:58:47 -04:00
trace_nop.c tracing/ftrace: make nop-tracer use polling wait for events on pipe 2009-03-23 09:22:15 +01:00
trace_output.c tracing: fix incorrect return type of ns2usecs() 2009-04-07 13:59:23 +02:00
trace_output.h trace: make argument 'mem' of trace_seq_putmem() const 2009-03-31 17:45:13 +02:00
trace_power.c tracing: Fix power tracer header 2009-04-13 23:39:57 +02:00
trace_printk.c tracing: remove recording function depth from trace_printk 2009-03-19 15:58:47 -04:00
trace_sched_switch.c ftrace: Add check of sched_stopped for probe_sched_wakeup 2009-04-07 14:01:11 +02:00
trace_sched_wakeup.c tracing: remove CALLER_ADDR2 from wakeup tracer 2009-04-07 13:58:54 +02:00
trace_selftest_dynamic.c ftrace: fix dynamic ftrace selftest 2008-05-23 21:13:23 +02:00
trace_selftest.c tracing: keep the tracing buffer after self-test failure 2009-03-22 15:17:21 +01:00
trace_stack.c tracing: left align location header in stack_trace 2009-03-13 00:00:58 -04:00
trace_stat.c trace_stat: keep original order 2009-03-25 18:32:34 +01:00
trace_stat.h tracing/ftrace: separate events tracing and stats tracing engine 2009-01-14 12:11:37 +01:00
trace_syscalls.c tracing/syscalls: use a dedicated file header 2009-04-09 05:43:32 +02:00
trace_sysprof.c tracing: make all file_operations const 2009-03-05 21:46:40 -05:00
trace_workqueue.c trace_workqueues: fix empty line's output 2009-03-25 18:32:35 +01:00
trace.c tracing: Append prompt in /debug/tracing/README file 2009-05-15 19:43:22 +02:00
trace.h Merge branch 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2009-04-07 14:10:10 -07:00