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Linus Torvalds 843f4f4bb1 A regression showed up that there's a large delay when enabling 
all events. This was prevalent when FTRACE_SELFTEST was enabled which
 enables all events several times, and caused the system bootup to
 pause for over a minute.
 
 This was tracked down to an addition of a synchronize_sched() performed
 when system call tracepoints are unregistered.
 
 The synchronize_sched() is needed between the unregistering of the
 system call tracepoint and a deletion of a tracing instance buffer.
 But placing the synchronize_sched() in the unreg of *every* system call
 tracepoint is a bit overboard. A single synchronize_sched() before
 the deletion of the instance is sufficient.
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Merge tag 'trace-fixes-3.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pull tracing fix from Steven Rostedt:
 "A regression showed up that there's a large delay when enabling all
  events.  This was prevalent when FTRACE_SELFTEST was enabled which
  enables all events several times, and caused the system bootup to
  pause for over a minute.

  This was tracked down to an addition of a synchronize_sched()
  performed when system call tracepoints are unregistered.

  The synchronize_sched() is needed between the unregistering of the
  system call tracepoint and a deletion of a tracing instance buffer.
  But placing the synchronize_sched() in the unreg of *every* system
  call tracepoint is a bit overboard.  A single synchronize_sched()
  before the deletion of the instance is sufficient"

* tag 'trace-fixes-3.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  tracing: Only run synchronize_sched() at instance deletion time
 		2013-12-06 08:34:16 -08:00
..
Kconfig ring-buffer: Select IRQ_WORK 2013-05-03 19:24:17 -04:00
Makefile trace: Stop compiling in trace_clock unconditionally 2012-09-13 22:52:08 -04:00
blktrace.c kernel: trace: blktrace: remove redundent memcpy() in compat_blk_trace_setup() 2013-11-08 09:04:30 -07:00
ftrace.c ftrace: Fix function graph with loading of modules 2013-11-26 10:36:50 -05:00
power-traces.c PM / tracing: remove deprecated power trace API 2013-01-26 00:39:12 +01:00
ring_buffer.c tracing: Typo fix on ring buffer comments 2013-07-18 21:31:26 -04:00
ring_buffer_benchmark.c tracing: Use NUMA allocation for per-cpu ring buffer pages 2011-06-14 22:04:39 -04:00
rpm-traces.c PM / Runtime: Introduce trace points for tracing rpm_* functions 2011-09-27 22:53:27 +02:00
trace.c This batch of changes is mostly clean ups and small bug fixes. 2013-11-16 12:23:18 -08:00
trace.h This batch of changes is mostly clean ups and small bug fixes. 2013-11-16 12:23:18 -08:00
trace_branch.c tracing: Update event filters for multibuffer 2013-11-05 16:50:20 -05:00
trace_clock.c tracing: Add "uptime" trace clock that uses jiffies 2013-03-15 00:36:09 -04:00
trace_entries.h tracing: Add trace_puts() for even faster trace_printk() tracing 2013-03-15 00:35:55 -04:00
trace_event_perf.c perf/trace: Properly use u64 to hold event_id 2013-11-19 16:57:44 +01:00
trace_events.c tracing: Only run synchronize_sched() at instance deletion time 2013-12-05 14:22:30 -05:00
trace_events_filter.c tracing: Update event filters for multibuffer 2013-11-05 16:50:20 -05:00
trace_events_filter_test.h tracing/filter: Add startup tests for events filter 2011-08-19 14:35:59 -04:00
trace_export.c tracing: Update event filters for multibuffer 2013-11-05 16:50:20 -05:00
trace_functions.c tracing: Add ref_data to function and fgraph tracer structs 2013-07-18 21:31:31 -04:00
trace_functions_graph.c tracing: Do not use signed enums with unsigned long long in fgragh output 2013-11-06 15:26:56 -05:00
trace_irqsoff.c tracing: Use flag buffer_disabled for irqsoff tracer 2013-07-01 20:34:28 -04:00
trace_kdb.c tracing: Consolidate max_tr into main trace_array structure 2013-03-15 00:35:40 -04:00
trace_kprobe.c tracing: Update event filters for multibuffer 2013-11-05 16:50:20 -05:00
trace_mmiotrace.c tracing: Update event filters for multibuffer 2013-11-05 16:50:20 -05:00
trace_nop.c
…
trace_output.c ftrace, sched: Add TRACE_FLAG_PREEMPT_RESCHED 2013-11-11 12:43:39 +01:00
trace_output.h tracing: Rename trace_event_mutex to trace_event_sem 2013-03-15 13:22:10 -04:00
trace_printk.c tracing: Add __tracepoint_string() to export string pointers 2013-07-26 13:39:44 -04:00
trace_probe.c tracing: Replace strict_strto* with kstrto* 2012-10-31 16:45:23 -04:00
trace_probe.h uprobes/tracing: Introduce is_trace_uprobe_enabled() 2013-02-08 18:24:30 +01:00
trace_sched_switch.c tracing: Update event filters for multibuffer 2013-11-05 16:50:20 -05:00
trace_sched_wakeup.c tracing: Add function-trace option to disable function tracing of latency tracers 2013-03-15 00:36:08 -04:00
trace_selftest.c ftrace: Do not run selftest if command line parameter is set 2013-07-01 20:57:15 -04:00
trace_selftest_dynamic.c ftrace: Add self-tests for multiple function trace users 2011-05-18 19:24:51 -04:00
trace_stack.c Tracing updates for Linux 3.10 2013-04-29 13:55:38 -07:00
trace_stat.c trace/trace_stat: use rbtree postorder iteration helper instead of opencoding 2013-11-05 16:01:47 -05:00
trace_stat.h tracing/stat: Add stat_release() callback 2009-07-10 12:14:05 +02:00
trace_syscalls.c tracing: Only run synchronize_sched() at instance deletion time 2013-12-05 14:22:30 -05:00
trace_uprobe.c tracing: Update event filters for multibuffer 2013-11-05 16:50:20 -05:00