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rockchip-kernel/kernel/trace
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Jiri Olsa f3e9758286 bpf: Remove trace_printk_lock 
commit e2bb9e01d5 upstream.

Both bpf_trace_printk and bpf_trace_vprintk helpers use static buffer guarded
with trace_printk_lock spin lock.

The spin lock contention causes issues with bpf programs attached to
contention_begin tracepoint [1][2].

Andrii suggested we could get rid of the contention by using trylock, but we
could actually get rid of the spinlock completely by using percpu buffers the
same way as for bin_args in bpf_bprintf_prepare function.

Adding new return 'buf' argument to struct bpf_bprintf_data and making
bpf_bprintf_prepare to return also the buffer for printk helpers.

  [1] https://lore.kernel.org/bpf/CACkBjsakT_yWxnSWr4r-0TpPvbKm9-OBmVUhJb7hV3hY8fdCkw@mail.gmail.com/
  [2] https://lore.kernel.org/bpf/CACkBjsaCsTovQHFfkqJKto6S4Z8d02ud1D7MPESrHa1cVNNTrw@mail.gmail.com/

Reported-by: Hao Sun <sunhao.th@gmail.com>
Suggested-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20221215214430.1336195-4-jolsa@kernel.org
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-02-23 09:12:51 +01:00
..
rv
rv/monitor: Add __init/__exit annotations to module init/exit funcs
2022-09-26 18:10:51 -04:00
blktrace.c
trace/blktrace: fix memory leak with using debugfs_lookup()
2023-03-10 09:33:46 +01:00
bpf_trace.c
bpf: Remove trace_printk_lock
2024-02-23 09:12:51 +01:00
bpf_trace.h
…
error_report-traces.c
…
fgraph.c
Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
2022-06-03 14:05:34 -07:00
fprobe.c
fprobe: Fix to ensure the number of active retprobes is not zero
2023-10-25 12:03:12 +02:00
ftrace_internal.h
…
ftrace.c
ftrace: Fix possible warning on checking all pages used in ftrace_process_locs()
2023-07-23 13:49:44 +02:00
Kconfig
tracing: Fix complicated dependency of CONFIG_TRACER_MAX_TRACE
2023-01-07 11:11:48 +01:00
kprobe_event_gen_test.c
tracing: Fix wrong return in kprobe_event_gen_test.c
2023-04-06 12:10:41 +02:00
Makefile
rv: Add Runtime Verification (RV) interface
2022-07-30 14:01:28 -04:00
pid_list.c
tracing: Cleanup double word in comment
2022-04-26 17:58:50 -04:00
pid_list.h
…
power-traces.c
…
preemptirq_delay_test.c
…
rethook.c
rethook: Use __rcu pointer for rethook::handler
2023-12-13 18:39:17 +01:00
ring_buffer_benchmark.c
…
ring_buffer.c
ring-buffer: Clean ring_buffer_poll_wait() error return
2024-02-23 09:12:42 +01:00
rpm-traces.c
…
synth_event_gen_test.c
tracing / synthetic: Disable events after testing in synth_event_gen_test_init()
2024-01-01 12:39:07 +00:00
trace_benchmark.c
tracing: Add numeric delta time to the trace event benchmark
2022-09-26 13:01:09 -04:00
trace_benchmark.h
tracing: Add numeric delta time to the trace event benchmark
2022-09-26 13:01:09 -04:00
trace_boot.c
tracing: Initialize integer variable to prevent garbage return value
2022-05-26 21:13:00 -04:00
trace_branch.c
…
trace_clock.c
…
trace_dynevent.c
tracing: Free buffers when a used dynamic event is removed
2022-11-23 19:07:12 -05:00
trace_dynevent.h
…
trace_entries.h
…
trace_eprobe.c
kernel/trace: Fix cleanup logic of enable_trace_eprobe
2023-07-23 13:49:24 +02:00
trace_event_perf.c
tracing/perf: Fix double put of trace event when init fails
2022-08-21 15:56:07 -04:00
trace_events_filter_test.h
…
trace_events_filter.c
tracing: Have trace_event_file have ref counters
2023-11-28 17:07:23 +00:00
trace_events_hist.c
tracing: Fix uaf issue when open the hist or hist_debug file
2024-01-20 11:50:07 +01:00
trace_events_inject.c
tracing: Have event inject files inc the trace array ref count
2023-09-23 11:11:11 +02:00
trace_events_synth.c
tracing: Have the user copy of synthetic event address use correct context
2023-11-28 17:07:13 +00:00
trace_events_trigger.c
tracing/trigger: Fix to return error if failed to alloc snapshot
2024-02-23 09:12:32 +01:00
trace_events_user.c
tracing/user_events: Fix struct arg size match check
2023-07-23 13:49:47 +02:00
trace_events.c
tracing: Have trace_event_file have ref counters
2023-11-28 17:07:23 +00:00
trace_export.c
tracing: Fix TASK_COMM_LEN in trace event format file
2023-02-14 19:11:54 +01:00
trace_functions_graph.c
…
trace_functions.c
…
trace_hwlat.c
tracing: Remove extra space at the end of hwlat_detector/mode
2023-09-13 09:42:57 +02:00
trace_irqsoff.c
tracing: Fix memleak due to race between current_tracer and trace
2023-08-30 16:11:00 +02:00
trace_kdb.c
…
trace_kprobe_selftest.c
…
trace_kprobe_selftest.h
…
trace_kprobe.c
tracing/kprobes: Fix symbol counting logic by looking at modules as well
2024-01-05 15:18:40 +01:00
trace_mmiotrace.c
…
trace_nop.c
…
trace_osnoise.c
tracing/timerlat: Always wakeup the timerlat thread
2023-06-09 10:34:24 +02:00
trace_output.c
tracing: Add size check when printing trace_marker output
2024-01-20 11:50:07 +01:00
trace_output.h
…
trace_preemptirq.c
tracing: hold caller_addr to hardirq_{enable,disable}_ip
2022-09-06 22:26:00 -04:00
trace_printk.c
…
trace_probe_kernel.h
tracing/probes: Fix to record 0-length data_loc in fetch_store_string*() if fails
2023-08-03 10:23:55 +02:00
trace_probe_tmpl.h
tracing/probes: Fix to record 0-length data_loc in fetch_store_string*() if fails
2023-08-03 10:23:55 +02:00
trace_probe.c
Revert "tracing: Add "(fault)" name injection to kernel probes"
2023-08-03 10:23:55 +02:00
trace_probe.h
tracing/kprobes: Return EADDRNOTAVAIL when func matches several symbols
2023-10-25 12:03:16 +02:00
trace_recursion_record.c
tracing: Use trace_create_file() to simplify creation of tracefs entries
2022-05-26 21:12:52 -04:00
trace_sched_switch.c
sched/tracing: Append prev_state to tp args instead
2022-05-12 00:37:11 +02:00
trace_sched_wakeup.c
tracing: Fix memleak due to race between current_tracer and trace
2023-08-30 16:11:00 +02:00
trace_selftest_dynamic.c
…
trace_selftest.c
tracing: Reset the function filter after completing trampoline/graph selftest
2022-05-25 16:57:37 -04:00
trace_seq.c
…
trace_stack.c
…
trace_stat.c
…
trace_stat.h
…
trace_synth.h
tracing: Allow synthetic events to pass around stacktraces
2023-08-03 10:23:55 +02:00
trace_syscalls.c
tracing: Remove unused __bad_type_size() method
2022-11-17 20:21:06 -05:00
trace_uprobe.c
bpf: Clear the probe_addr for uprobe
2023-09-13 09:42:30 +02:00
trace.c
tracing: Inform kmemleak of saved_cmdlines allocation
2024-02-23 09:12:47 +01:00
trace.h
tracing: Fix uaf issue when open the hist or hist_debug file
2024-01-20 11:50:07 +01:00
tracing_map.c
tracing: Ensure visibility when inserting an element into tracing_map
2024-01-31 16:17:04 -08:00
tracing_map.h
…