Steven Rostedt (VMware) 43ff926a0c ftrace: Update func_pos in t_start() when all functions are enabled ... If all functions are enabled, there's a comment displayed in the file to denote that: # cd /sys/kernel/debug/tracing # cat set_ftrace_filter #### all functions enabled #### If a function trigger is set, those are displayed as well: # echo schedule:traceoff >> /debug/tracing/set_ftrace_filter # cat set_ftrace_filter #### all functions enabled #### schedule:traceoff:unlimited But if you read that file with dd, the output can change: # dd if=/debug/tracing/set_ftrace_filter bs=1 #### all functions enabled #### 32+0 records in 32+0 records out 32 bytes copied, 7.0237e-05 s, 456 kB/s This is because the "pos" variable is updated for the comment, but func_pos is not. "func_pos" is used by the triggers (or hashes) to know how many functions were printed and it bases its index from the pos - func_pos. func_pos should be 1 to count for the comment printed. But since it is not, t_hash_start() thinks that one trigger was already printed. The cat gets to t_hash_start() via t_next() and not t_start() which updates both pos and func_pos. Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>		2017-03-31 18:00:37 -04:00
..
blktrace.c	blktrace: use existing disk debugfs directory	2017-02-02 10:20:16 -07:00
bpf_trace.c	bpf: mark all registered map/prog types as __ro_after_init	2017-02-17 13:40:04 -05:00
ftrace.c	ftrace: Update func_pos in t_start() when all functions are enabled	2017-03-31 18:00:37 -04:00
Kconfig	perf/core: Rename CONFIG_[UK]PROBE_EVENT to CONFIG_[UK]PROBE_EVENTS	2017-03-01 10:26:39 +01:00
Makefile	perf/core: Rename CONFIG_[UK]PROBE_EVENT to CONFIG_[UK]PROBE_EVENTS	2017-03-01 10:26:39 +01:00
power-traces.c
ring_buffer_benchmark.c	sched/headers: Prepare for new header dependencies before moving code to <uapi/linux/sched/types.h>	2017-03-02 08:42:27 +01:00
ring_buffer.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/clock.h>	2017-03-02 08:42:27 +01:00
rpm-traces.c
trace_benchmark.c	tracing: Fix return value check in trace_benchmark_reg()	2017-02-15 09:02:27 -05:00
trace_benchmark.h
trace_branch.c	tracing: Add the constant count for branch tracer	2017-01-19 08:57:41 -05:00
trace_clock.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/clock.h>	2017-03-02 08:42:27 +01:00
trace_entries.h	tracing: Add the constant count for branch tracer	2017-01-19 08:57:41 -05:00
trace_event_perf.c
trace_events_filter_test.h
trace_events_filter.c
trace_events_hist.c	sched/headers: Prepare to use <linux/rcuupdate.h> instead of <linux/rculist.h> in <linux/sched.h>	2017-03-02 08:42:38 +01:00
trace_events_trigger.c	sched/headers: Prepare to use <linux/rcuupdate.h> instead of <linux/rculist.h> in <linux/sched.h>	2017-03-02 08:42:38 +01:00
trace_events.c
trace_export.c
trace_functions_graph.c
trace_functions.c	ftrace: Have function tracing start in early boot up	2017-03-24 20:51:48 -04:00
trace_hwlat.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/clock.h>	2017-03-02 08:42:27 +01:00
trace_irqsoff.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
trace_kdb.c
trace_kprobe.c	sched/headers: Prepare to use <linux/rcuupdate.h> instead of <linux/rculist.h> in <linux/sched.h>	2017-03-02 08:42:38 +01:00
trace_mmiotrace.c
trace_nop.c
trace_output.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/mm.h>	2017-03-02 08:42:28 +01:00
trace_output.h
trace_printk.c
trace_probe.c	tracing/probes: Fix a warning message to show correct maximum length	2017-02-15 10:32:48 -05:00
trace_probe.h	perf/core: Rename CONFIG_[UK]PROBE_EVENT to CONFIG_[UK]PROBE_EVENTS	2017-03-01 10:26:39 +01:00
trace_sched_switch.c
trace_sched_wakeup.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
trace_selftest_dynamic.c
trace_selftest.c	sched/headers: Prepare for new header dependencies before moving code to <uapi/linux/sched/types.h>	2017-03-02 08:42:27 +01:00
trace_seq.c
trace_stack.c	scripts/spelling.txt: add "overide" pattern and fix typo instances	2017-03-09 17:01:09 -08:00
trace_stat.c
trace_stat.h
trace_syscalls.c
trace_uprobe.c	sched/headers: Prepare to use <linux/rcuupdate.h> instead of <linux/rculist.h> in <linux/sched.h>	2017-03-02 08:42:38 +01:00
trace.c	tracing: Move trace_handle_return() out of line	2017-03-24 20:51:50 -04:00
trace.h	ftrace: Have function tracing start in early boot up	2017-03-24 20:51:48 -04:00
tracing_map.c
tracing_map.h