Wei Li 2a13ca2e8a tracing/hwlat: Fix a race during cpuhp processing ...

The cpuhp online/offline processing race also exists in percpu-mode hwlat
tracer in theory, apply the fix too. That is:

    T1                       | T2
    [CPUHP_ONLINE]           | cpu_device_down()
     hwlat_hotplug_workfn()  |
                             |     cpus_write_lock()
                             |     takedown_cpu(1)
                             |     cpus_write_unlock()
    [CPUHP_OFFLINE]          |
        cpus_read_lock()     |
        start_kthread(1)     |
        cpus_read_unlock()   |

Cc: stable@vger.kernel.org
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Link: https://lore.kernel.org/20240924094515.3561410-5-liwei391@huawei.com
Fixes: ba998f7d9531 ("trace/hwlat: Support hotplug operations")
Signed-off-by: Wei Li <liwei391@huawei.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>

2024-10-03 16:43:23 -04:00

..

rv

[tree-wide] finally take no_llseek out

2024-09-27 08:18:43 -07:00

blktrace.c

blktrace: convert strncpy() to strscpy_pad()

2024-04-25 21:07:08 -07:00

bpf_trace.c

bpf-next-6.12

2024-09-21 09:27:50 -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

tracing: add error_report_end trace point

2021-02-26 09:41:02 -08:00

fgraph.c

tracing: fgraph: Fix to add new fgraph_ops to array after ftrace_startup_subops()

2024-08-21 13:49:59 -04:00

fprobe.c

fprobe: Fix to allocate entry_data_size buffer with rethook instances

2024-03-01 09:18:24 +09:00

ftrace_internal.h

function_graph: Make fgraph_update_pid_func() a stub for !DYNAMIC_FTRACE

2024-06-10 18:08:23 -04:00

ftrace.c

sysctl: treewide: constify the ctl_table argument of proc_handlers

2024-07-24 20:59:29 +02:00

Kconfig

tracing: Build event generation tests only as modules

2024-06-12 08:43:12 +09:00

kprobe_event_gen_test.c

tracing: Fix wrong return in kprobe_event_gen_test.c

2023-03-19 12:20:48 -04:00

Makefile

tracing/probes: Move finding func-proto API and getting func-param API to trace_btf

2023-08-23 09:39:45 +09:00

pid_list.c

trace/pid_list: Change gfp flags in pid_list_fill_irq()

2024-07-15 15:07:14 -04:00

pid_list.h

tracing: Create a sparse bitmask for pid filtering

2021-10-05 17:38:45 -04:00

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_benchmark.c

ring-buffer: Read and write to ring buffers with custom sub buffer size

2023-12-20 07:54:56 -05:00

ring_buffer.c

ring-buffer: Align meta-page to sub-buffers for improved TLB usage

2024-08-26 13:42:23 -04:00

rpm-traces.c

…

synth_event_gen_test.c

tracing / synthetic: Disable events after testing in synth_event_gen_test_init()

2023-12-21 10:04:45 -05:00

trace_benchmark.c

tracing: Improve benchmark test performance by using do_div()

2024-05-13 20:00:57 -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: Allow creating instances with specified system events

2023-12-18 23:14:16 -05:00

trace_branch.c

tracing: Merge irqflags + preempt counter.

2021-02-02 17:02:06 -05:00

trace_btf.c

tracing/probes: Fix to search structure fields correctly

2024-02-17 21:25:42 +09:00

trace_btf.h

tracing/probes: Add a function to search a member of a struct/union

2023-08-23 09:40:16 +09:00

trace_clock.c

tracing: Do no increment trace_clock_global() by one

2021-06-18 09:10:00 -04:00

trace_dynevent.c

tracing: Free buffers when a used dynamic event is removed

2022-11-23 19:07:12 -05:00

trace_dynevent.h

tracing: Add DYNAMIC flag for dynamic events

2021-08-18 18:10:32 -04:00

trace_entries.h

tracing: Add back FORTIFY_SOURCE logic to kernel_stack event structure

2023-07-30 18:11:44 -04:00

trace_eprobe.c

tracing/probes: Support $argN in return probe (kprobe and fprobe)

2024-03-07 00:27:34 +09:00

trace_event_perf.c

tracing/perf: Use strndup_user instead of kzalloc/strncpy_from_user

2022-11-23 19:08:31 -05:00

trace_events_filter_test.h

…

trace_events_filter.c

tracing: Have trace_event_file have ref counters

2023-11-01 23:44:44 -04:00

trace_events_hist.c

tracing: Have format file honor EVENT_FILE_FL_FREED

2024-08-07 18:12:46 -04:00

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/synthetic: Fix trace_string() return value

2024-02-15 11:40:01 -05:00

trace_events_trigger.c

tracing: Have format file honor EVENT_FILE_FL_FREED

2024-08-07 18:12:46 -04:00

trace_events_user.c

sysctl: treewide: constify the ctl_table argument of proc_handlers

2024-07-24 20:59:29 +02:00

trace_events.c

tracing: Use refcount for trace_event_file reference counter

2024-08-07 18:12:46 -04:00

trace_export.c

tracing: Add back FORTIFY_SOURCE logic to kernel_stack event structure

2023-07-30 18:11:44 -04:00

trace_fprobe.c

tracing/fprobe: Support raw tracepoints on future loaded modules

2024-09-25 23:23:44 +09:00

trace_functions_graph.c

tracing/fgraph: Have fgraph handle previous boot function addresses

2024-08-15 08:35:48 -04:00

trace_functions.c

ftrace: Hide one more entry in stack trace when ftrace_pid is enabled

2024-06-06 15:22:18 -04:00

trace_hwlat.c

tracing/hwlat: Fix a race during cpuhp processing

2024-10-03 16:43:23 -04:00

trace_irqsoff.c

function_graph: Move set_graph_function tests to shadow stack global var

2024-06-04 10:37:35 -04:00

trace_kdb.c

kdb: Rename members of struct kdbtab_t

2021-07-27 17:05:06 +01:00

trace_kprobe_selftest.c

tracing: arm64: Avoid missing-prototype warnings

2023-07-12 12:06:04 -04:00

trace_kprobe_selftest.h

…

trace_kprobe.c

tracing/kprobes: Fix build error when find_module() is not available

2024-07-10 09:47:00 +09:00

trace_mmiotrace.c

tracing: Remove definition of DEBUG in trace_mmiotrace.c

2021-02-02 17:02:07 -05:00

trace_nop.c

…

trace_osnoise.c

tracing/timerlat: Fix a race during cpuhp processing

2024-10-03 16:43:22 -04:00

trace_output.c

tracing: Have trace_printk not use binary prints if boot buffer

2024-08-26 13:54:08 -04:00

trace_output.h

tracing: Add "fields" option to show raw trace event fields

2023-03-29 06:52:08 -04:00

trace_preemptirq.c

cpuidle: tracing, preempt: Squash _rcuidle tracing

2023-01-31 15:01:46 +01:00

trace_printk.c

tracing: Disable "other" permission bits in the tracefs files

2021-10-08 18:08:43 -04:00

trace_probe_kernel.h

tracing/probes: Fix to record 0-length data_loc in fetch_store_string*() if fails

2023-07-14 17:04:58 +09:00

trace_probe_tmpl.h

tracing/probes: Support $argN in return probe (kprobe and fprobe)

2024-03-07 00:27:34 +09:00

trace_probe.c

tracing/probes: fix error check in parse_btf_field()

2024-05-27 21:32:35 +09:00

trace_probe.h

tracing/probes: support '%pd' type for print struct dentry's name

2024-05-01 23:18:47 +09:00

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

tracing: Move saved_cmdline code into trace_sched_switch.c

2024-03-17 07:58:53 -04:00

trace_sched_wakeup.c

sched/rt: Rename realtime_{prio, task}() to rt_or_dl_{prio, task}()

2024-08-07 18:32:38 +02:00

trace_selftest_dynamic.c

…

trace_selftest.c

tracing: Fix memory leak in fgraph storage selftest

2024-08-21 15:10:33 -04:00

trace_seq.c

trace_seq: Increase the buffer size to almost two pages

2023-12-18 23:14:16 -05:00

trace_stack.c

sysctl: treewide: constify the ctl_table argument of proc_handlers

2024-07-24 20:59:29 +02:00

trace_stat.c

tracing: Disable "other" permission bits in the tracefs files

2021-10-08 18:08:43 -04:00

trace_stat.h

…

trace_synth.h

tracing: Allow synthetic events to pass around stacktraces

2023-01-25 10:31:24 -05:00

trace_syscalls.c

bpf: Use fake pt_regs when doing bpf syscall tracepoint tracing

2024-09-11 13:27:27 -07:00

trace_uprobe.c

Probes updates for v6.12:

2024-09-26 08:55:36 -07:00

trace.c

tracing: Fix trace_check_vprintf() when tp_printk is used

2024-10-03 16:43:22 -04:00

trace.h

tracing: Add option to set an instance to be the trace_printk destination

2024-08-26 13:54:08 -04:00

tracing_map.c

tracing: Fix overflow in get_free_elt()

2024-08-07 20:23:12 -04:00

tracing_map.h

tracing: Remove unused extern declaration tracing_map_set_field_descr()

2023-07-23 11:08:14 -04:00