Tahsin Erdogan
75df6e688c
tracing: Fix trace_pipe behavior for instance traces
...
When reading data from trace_pipe, tracing_wait_pipe() performs a
check to see if tracing has been turned off after some data was read.
Currently, this check always looks at global trace state, but it
should be checking the trace instance where trace_pipe is located at.
Because of this bug, cat instances/i1/trace_pipe in the following
script will immediately exit instead of waiting for data:
cd /sys/kernel/debug/tracing
echo 0 > tracing_on
mkdir -p instances/i1
echo 1 > instances/i1/tracing_on
echo 1 > instances/i1/events/sched/sched_process_exec/enable
cat instances/i1/trace_pipe
Link: http://lkml.kernel.org/r/20170917102348.1615-1-tahsin@google.com
Cc: stable@vger.kernel.org
Fixes: 10246fa35d ("tracing: give easy way to clear trace buffer")
Signed-off-by: Tahsin Erdogan <tahsin@google.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2017-09-19 18:33:42 -04:00
..
blktrace.c
block: switch bios to blk_status_t
2017-06-09 09:27:32 -06:00
bpf_trace.c
bpf: fix bpf_trace_printk on 32 bit archs
2017-08-15 17:32:15 -07:00
ftrace.c
ftrace: Fix memleak when unregistering dynamic ops when tracing disabled
2017-09-01 13:55:49 -04:00
Kconfig
tracing: Rename update the enum_map file
2017-06-13 17:13:06 -04:00
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.c
ring-buffer: Have ring_buffer_alloc_read_page() return error on offline CPU
2017-08-02 14:23:02 -04:00
ring_buffer_benchmark.c
ring-buffer: Have ring_buffer_alloc_read_page() return error on offline CPU
2017-08-02 14:23:02 -04:00
rpm-traces.c
trace.c
tracing: Fix trace_pipe behavior for instance traces
2017-09-19 18:33:42 -04:00
trace.h
tracing: Ignore mmiotrace from kernel commandline
2017-09-19 12:36:01 -04:00
trace_benchmark.c
tracing: Have the trace_event benchmark thread call cond_resched_rcu_qs()
2017-04-17 15:21:19 -04:00
trace_benchmark.h
tracing: Have the reg function allow to fail
2016-12-09 09:13:30 -05:00
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
trace: make trace_hwlat timestamp y2038 safe
2017-05-08 17:15:15 -07:00
trace_event_perf.c
trace_events.c
tracing: Fix clear of RECORDED_TGID flag when disabling trace event
2017-09-05 12:00:09 -04:00
trace_events_filter.c
tracing: Fix freeing of filter in create_filter() when set_str is false
2017-08-24 10:07:38 -04:00
trace_events_filter_test.h
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_export.c
trace_functions.c
ftrace: Fix regression with module command in stack_trace_filter
2017-06-29 10:05:45 -04:00
trace_functions_graph.c
tracing/fgraph: Have wakeup and irqsoff tracers ignore graph functions too
2016-12-09 09:21:35 -05:00
trace_hwlat.c
trace: make trace_hwlat timestamp y2038 safe
2017-05-08 17:15:15 -07:00
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
A few more minor updates:
2017-07-13 13:17:19 -07:00
trace_mmiotrace.c
tracing: Ignore mmiotrace from kernel commandline
2017-09-19 12:36:01 -04:00
trace_nop.c
trace_output.c
tracing: Add support for display of tgid in trace output
2017-06-27 13:30:28 -04:00
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
tracing: Add support for recording tgid of tasks
2017-06-27 13:30:28 -04:00
trace_sched_wakeup.c
clocksource: Use a plain u64 instead of cycle_t
2016-12-25 11:04:12 +01:00
trace_selftest.c
ftrace: Fix selftest goto location on error
2017-09-01 12:04:09 -04:00
trace_selftest_dynamic.c
trace_seq.c
trace_stack.c
tracing: Do note expose stack_trace_filter without DYNAMIC_FTRACE
2017-07-11 19:21:04 -04:00
trace_stat.c
trace_stat.h
trace_syscalls.c
tracing/syscalls: fix multiline in error message text
2016-09-29 10:25:23 +02:00
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
tracing_map.c
tracing: Fix kmemleak in tracing_map_array_free()
2017-08-24 10:05:51 -04:00
tracing_map.h