mirror-linux/kernel/trace
zhoumin 42ea22e754 ftrace: Add cond_resched() to ftrace_graph_set_hash()
When the kernel contains a large number of functions that can be traced,
the loop in ftrace_graph_set_hash() may take a lot of time to execute.
This may trigger the softlockup watchdog.

Add cond_resched() within the loop to allow the kernel to remain
responsive even when processing a large number of functions.

This matches the cond_resched() that is used in other locations of the
code that iterates over all functions that can be traced.

Cc: stable@vger.kernel.org
Fixes: b9b0c831be ("ftrace: Convert graph filter to use hash tables")
Link: https://lore.kernel.org/tencent_3E06CE338692017B5809534B9C5C03DA7705@qq.com
Signed-off-by: zhoumin <teczm@foxmail.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2025-04-02 09:51:25 -04:00
..
rv rv: Add scpd, snep and sncid per-cpu monitors 2025-03-24 17:27:39 -04:00
Kconfig ftrace: Have tracing function args depend on PROBE_EVENTS_BTF_ARGS 2025-04-02 09:50:56 -04:00
Makefile
blktrace.c blktrace: remove redundant return at end of function 2024-12-23 08:17:23 -07:00
bpf_trace.c Modules changes for 6.15-rc1 2025-03-30 15:44:36 -07:00
bpf_trace.h tracing/treewide: Remove second parameter of __assign_str() 2024-05-22 20:14:47 -04:00
error_report-traces.c
fgraph.c fgraph: Correct typo in ftrace_return_to_handler comment 2025-03-04 11:15:50 -05:00
fprobe.c fprobe: Fix accounting of when to unregister from function graph 2025-02-21 09:36:12 -05:00
ftrace.c ftrace: Add cond_resched() to ftrace_graph_set_hash() 2025-04-02 09:51:25 -04:00
ftrace_internal.h function_graph: Make fgraph_update_pid_func() a stub for !DYNAMIC_FTRACE 2024-06-10 18:08:23 -04:00
kprobe_event_gen_test.c
pid_list.c pid: allow pid_max to be set per pid namespace 2024-12-02 11:25:25 +01:00
pid_list.h
power-traces.c
preemptirq_delay_test.c minmax: make generic MIN() and MAX() macros available everywhere 2024-07-28 15:49:18 -07:00
rethook.c rethook: honor CONFIG_FTRACE_VALIDATE_RCU_IS_WATCHING in rethook_try_get() 2024-05-01 23:18:48 +09:00
ring_buffer.c ring-buffer updates for v6.15 2025-03-31 13:37:22 -07:00
ring_buffer_benchmark.c ring-buffer: Use str_low_high() helper in ring_buffer_producer() 2024-10-19 11:12:25 -04:00
rpm-traces.c
synth_event_gen_test.c
trace.c tracing: Free module_delta on freeing of persistent ring buffer 2025-04-02 09:51:25 -04:00
trace.h ring-buffer updates for v6.15 2025-03-31 13:37:22 -07:00
trace_benchmark.c tracing: Improve benchmark test performance by using do_div() 2024-05-13 20:00:57 -04:00
trace_benchmark.h
trace_boot.c
trace_branch.c tracing: Remove TRACE_EVENT_FL_FILTERED logic 2024-10-08 15:24:49 -04:00
trace_btf.c
trace_btf.h
trace_clock.c tracing: Use atomic64_inc_return() in trace_clock_counter() 2024-10-09 19:59:49 -04:00
trace_dynevent.c tracing/string: Create and use __free(argv_free) in trace_dynevent.c 2024-12-26 10:38:37 -05:00
trace_dynevent.h
trace_entries.h ftrace: Add arguments to function tracer 2025-03-04 11:27:24 -05:00
trace_eprobe.c Probes updates for v6.15: 2025-03-27 19:31:34 -07:00
trace_event_perf.c perf: Remove unnecessary parameter of security check 2025-02-26 14:13:58 -05:00
trace_events.c ring-buffer updates for v6.15 2025-03-31 13:37:22 -07:00
trace_events_filter.c tracing: Switch trace_events_filter.c code over to use guard() 2024-12-26 10:38:37 -05:00
trace_events_filter_test.h
trace_events_hist.c tracing updates for v6.15: 2025-03-27 16:22:12 -07:00
trace_events_inject.c tracing: Have format file honor EVENT_FILE_FL_FREED 2024-08-07 18:12:46 -04:00
trace_events_synth.c tracing: Replace strncpy with memcpy for fixed-length substring copy 2025-03-25 17:44:32 -04:00
trace_events_trigger.c tracing: Constify struct event_trigger_ops 2025-03-20 07:04:00 -04:00
trace_events_user.c tracing/user_events: Slightly simplify user_seq_show() 2025-03-06 13:35:27 -05:00
trace_export.c
trace_fprobe.c tracing: probe-events: Log error for exceeding the number of arguments 2025-03-27 21:19:54 +09:00
trace_functions.c ftrace: Add arguments to function tracer 2025-03-04 11:27:24 -05:00
trace_functions_graph.c tracing: Fix use-after-free in print_graph_function_flags during tracer switching 2025-03-22 05:42:42 -04:00
trace_hwlat.c tracing: Remove TRACE_EVENT_FL_FILTERED logic 2024-10-08 15:24:49 -04:00
trace_irqsoff.c tracing: Fix use-after-free in print_graph_function_flags during tracer switching 2025-03-22 05:42:42 -04:00
trace_kdb.c trace: kdb: Replace simple_strtoul with kstrtoul in kdb_ftdump 2024-11-02 08:33:13 +00:00
trace_kprobe.c Modules changes for 6.15-rc1 2025-03-30 15:44:36 -07:00
trace_kprobe_selftest.c
trace_kprobe_selftest.h
trace_mmiotrace.c tracing: Remove TRACE_EVENT_FL_FILTERED logic 2024-10-08 15:24:49 -04:00
trace_nop.c
trace_osnoise.c tracing updates for v6.15: 2025-03-27 16:22:12 -07:00
trace_output.c ring-buffer updates for v6.15 2025-03-31 13:37:22 -07:00
trace_output.h ftrace: Add print_function_args() 2025-03-04 11:27:23 -05:00
trace_preemptirq.c tracing: Fix archs that still call tracepoints without RCU watching 2024-12-05 09:28:58 -05:00
trace_printk.c
trace_probe.c tracing: probe-events: Add comments about entry data storing code 2025-03-27 21:19:54 +09:00
trace_probe.h tracing: probe-events: Log error for exceeding the number of arguments 2025-03-27 21:19:54 +09:00
trace_probe_kernel.h
trace_probe_tmpl.h tracing/fprobe: Enable fprobe events with CONFIG_DYNAMIC_FTRACE_WITH_ARGS 2024-12-26 10:50:04 -05:00
trace_recursion_record.c
trace_sched_switch.c pid: allow pid_max to be set per pid namespace 2024-12-02 11:25:25 +01:00
trace_sched_wakeup.c tracing: Fix use-after-free in print_graph_function_flags during tracer switching 2025-03-22 05:42:42 -04:00
trace_selftest.c fgraph: Pass ftrace_regs to retfunc 2024-12-26 10:50:03 -05:00
trace_selftest_dynamic.c
trace_seq.c
trace_stack.c tracing: Switch trace_stack.c code over to use guard() 2024-12-26 10:38:37 -05:00
trace_stat.c tracing: Switch trace_stat.c code over to use guard() 2024-12-26 10:38:37 -05:00
trace_stat.h
trace_synth.h
trace_syscalls.c tracing/perf: Add might_fault check to syscall probes 2024-10-09 17:09:46 -04:00
trace_uprobe.c tracing: probe-events: Log error for exceeding the number of arguments 2025-03-27 21:19:54 +09:00
tracing_map.c tracing: Fix cmp_entries_dup() to respect sort() comparison rules 2024-12-04 10:38:24 -05:00
tracing_map.h