Steven Rostedt b382ede6b5 tracing: Expand ring buffer when trace_printk() is used ... Since tracing is not used by 99% of Linux users, even though tracing may be configured in, it does not make sense to allocate 1.4 Megs per CPU for the ring buffers if they are not used. Thus, on boot up the ring buffers are set to a minimal size until something needs the and they are expanded. This works well for events and tracers (function, etc), but for the asynchronous use of trace_printk() which can write to the ring buffer at any time, does not expand the buffers. On boot up a check is made to see if any trace_printk() is used to see if the trace_printk() temp buffer pages should be allocated. This same code can be used to expand the buffers as well. Suggested-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>		2012-10-31 16:45:28 -04:00
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blktrace.c	simple_open: automatically convert to simple_open()	2012-04-05 15:25:50 -07:00
ftrace.c	tracing: Allow tracers to start at core initcall	2012-10-31 16:45:24 -04:00
Kconfig	trace: Stop compiling in trace_clock unconditionally	2012-09-13 22:52:08 -04:00
Makefile	trace: Stop compiling in trace_clock unconditionally	2012-09-13 22:52:08 -04:00
power-traces.c	perf: Clean up power events by introducing new, more generic ones	2011-01-04 08:16:54 +01:00
ring_buffer_benchmark.c	tracing: Use NUMA allocation for per-cpu ring buffer pages	2011-06-14 22:04:39 -04:00
ring_buffer.c	ring-buffer: Add a 'dropped events' counter	2012-10-31 16:45:27 -04:00
rpm-traces.c	PM / Runtime: Introduce trace points for tracing rpm_* functions	2011-09-27 22:53:27 +02:00
trace_branch.c	tracing: Allow tracers to start at core initcall	2012-10-31 16:45:24 -04:00
trace_clock.c	tracing: Add a counter clock for those that do not trust clocks	2011-09-19 11:35:58 -04:00
trace_entries.h	Merge branch 'tip/perf/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace into perf/urgent	2012-03-24 08:19:09 +01:00
trace_event_perf.c	perf/core improvements and fixes:	2012-08-21 11:27:00 +02:00
trace_events_filter_test.h	tracing/filter: Add startup tests for events filter	2011-08-19 14:35:59 -04:00
trace_events_filter.c	tracing: Replace strict_strto* with kstrto*	2012-10-31 16:45:23 -04:00
trace_events.c	trace: Move trace event enable from fs_initcall to core_initcall	2012-09-24 14:13:02 -04:00
trace_export.c	tracing: Do not enable function event with enable	2012-05-10 15:55:43 -04:00
trace_functions_graph.c	tracing: Allow tracers to start at core initcall	2012-10-31 16:45:24 -04:00
trace_functions.c	tracing: Allow tracers to start at core initcall	2012-10-31 16:45:24 -04:00
trace_irqsoff.c	tracing: Change tracer's integer flags to bool	2012-10-31 16:45:25 -04:00
trace_kdb.c	kdb,ftdump: Remove reference to internal kdb include	2010-10-22 15:34:11 -05:00
trace_kprobe.c	tracing: Replace strict_strto* with kstrto*	2012-10-31 16:45:23 -04:00
trace_mmiotrace.c	atomic: use <linux/atomic.h>	2011-07-26 16:49:47 -07:00
trace_nop.c
trace_output.c	tracing: Register the ftrace internal events during early boot	2012-06-14 15:22:14 -04:00
trace_output.h	tracing: Allow events to share their print functions	2010-05-14 14:20:32 -04:00
trace_printk.c	tracing: Add percpu buffers for trace_printk()	2012-04-23 21:15:55 -04:00
trace_probe.c	tracing: Replace strict_strto* with kstrto*	2012-10-31 16:45:23 -04:00
trace_probe.h	tracing: Provide trace events interface for uprobes	2012-05-07 14:30:17 +02:00
trace_sched_switch.c	tracing: Remove obsolete sched_switch tracer	2011-02-08 17:14:56 -05:00
trace_sched_wakeup.c	tracing: Change tracer's integer flags to bool	2012-10-31 16:45:25 -04:00
trace_selftest_dynamic.c	ftrace: Add self-tests for multiple function trace users	2011-05-18 19:24:51 -04:00
trace_selftest.c	tracing: Fix wakeup_rt self test on virtual machines	2012-08-07 09:40:51 -04:00
trace_stack.c	ftrace: Add default recursion protection for function tracing	2012-07-31 10:29:52 -04:00
trace_stat.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
trace_stat.h	tracing/stat: Add stat_release() callback	2009-07-10 12:14:05 +02:00
trace_syscalls.c	trace: Move trace event enable from fs_initcall to core_initcall	2012-09-24 14:13:02 -04:00
trace_uprobe.c	tracing: Replace strict_strto* with kstrto*	2012-10-31 16:45:23 -04:00
trace.c	tracing: Expand ring buffer when trace_printk() is used	2012-10-31 16:45:28 -04:00
trace.h	tracing: Change tracer's integer flags to bool	2012-10-31 16:45:25 -04:00