Steven Rostedt (Google) 84f4be2093 tracing: Add ioctl() to force ring buffer waiters to wake up ...

commit 01b2a52171 upstream.

If a process is waiting on the ring buffer for data, there currently isn't
a clean way to force it to wake up. Add an ioctl call that will force any
tasks that are waiting on the trace_pipe_raw file to wake up.

Link: https://lkml.kernel.org/r/20220929095029.117f913f@gandalf.local.home

Cc: stable@vger.kernel.org
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Fixes: e30f53aad2 ("tracing: Do not busy wait in buffer splice")
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2022-10-26 12:34:31 +02:00

..

blktrace.c

blktrace: Trace remapped requests correctly

2022-08-17 14:23:13 +02:00

bpf_trace.c

bpf: Add MEM_RDONLY for helper args that are pointers to rdonly mem.

2022-05-01 17:22:26 +02:00

bpf_trace.h

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error_report-traces.c

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fgraph.c

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ftrace_internal.h

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ftrace.c

ftrace: Properly unset FTRACE_HASH_FL_MOD

2022-10-26 12:34:30 +02:00

Kconfig

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kprobe_event_gen_test.c

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Makefile

tracing: Place trace_pid_list logic into abstract functions

2022-07-29 17:25:29 +02:00

pid_list.c

tracing: Place trace_pid_list logic into abstract functions

2022-07-29 17:25:29 +02:00

pid_list.h

tracing: Place trace_pid_list logic into abstract functions

2022-07-29 17:25:29 +02:00

power-traces.c

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preemptirq_delay_test.c

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ring_buffer_benchmark.c

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ring_buffer.c

ring-buffer: Fix race between reset page and reading page

2022-10-26 12:34:31 +02:00

rpm-traces.c

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synth_event_gen_test.c

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trace_benchmark.c

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trace_benchmark.h

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trace_boot.c

tracing: Initialize integer variable to prevent garbage return value

2022-06-09 10:23:21 +02:00

trace_branch.c

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trace_clock.c

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trace_dynevent.c

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trace_dynevent.h

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trace_entries.h

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trace_eprobe.c

tracing/eprobes: Fix reading of string fields

2022-08-25 11:40:28 +02:00

trace_event_perf.c

tracing/perf: Fix double put of trace event when init fails

2022-08-25 11:39:57 +02:00

trace_events_filter_test.h

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trace_events_filter.c

tracing: Add ustring operation to filtering string pointers

2022-03-08 19:12:33 +01:00

trace_events_hist.c

tracing/histograms: Fix memory leak problem

2022-07-21 21:24:11 +02:00

trace_events_inject.c

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trace_events_synth.c

tracing: Do not let synth_events block other dyn_event systems during create

2022-03-08 19:12:35 +01:00

trace_events_trigger.c

tracing: Fix to check event_mutex is held while accessing trigger list

2022-09-15 11:30:02 +02:00

trace_events.c

tracing: Have filter accept "common_cpu" to be consistent

2022-08-25 11:39:58 +02:00

trace_export.c

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trace_functions_graph.c

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trace_functions.c

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trace_hwlat.c

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trace_irqsoff.c

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trace_kdb.c

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trace_kprobe_selftest.c

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trace_kprobe_selftest.h

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trace_kprobe.c

tracing/kprobes: Check whether get_kretprobe() returns NULL in kretprobe_dispatcher()

2022-06-29 09:03:20 +02:00

trace_mmiotrace.c

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trace_nop.c

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trace_osnoise.c

tracing/osnoise: Force quiescent states while tracing

2022-03-16 14:23:43 +01:00

trace_output.c

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trace_output.h

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trace_preemptirq.c

tracing: hold caller_addr to hardirq_{enable,disable}_ip

2022-09-20 12:39:43 +02:00

trace_printk.c

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trace_probe_tmpl.h

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trace_probe.c

tracing/probes: Have kprobes and uprobes use $COMM too

2022-08-25 11:39:58 +02:00

trace_probe.h

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trace_recursion_record.c

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trace_sched_switch.c

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trace_sched_wakeup.c

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trace_selftest_dynamic.c

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trace_selftest.c

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trace_seq.c

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trace_stack.c

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trace_stat.c

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trace_stat.h

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trace_synth.h

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trace_syscalls.c

tracing: Make tp_printk work on syscall tracepoints

2022-06-14 18:36:14 +02:00

trace_uprobe.c

tracing/uprobes: Check the return value of kstrdup() for tu->filename

2022-03-08 19:12:38 +01:00

trace.c

tracing: Add ioctl() to force ring buffer waiters to wake up

2022-10-26 12:34:31 +02:00

trace.h

tracing: Add '__rel_loc' using trace event macros

2022-08-17 14:24:26 +02:00

tracing_map.c

tracing: Fix a kmemleak false positive in tracing_map

2021-12-17 10:30:16 +01:00

tracing_map.h

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