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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: ba998f7d95 ("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
…
bpf_trace.c
Merge tag 'bpf-next-6.12' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
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
…
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
…
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
…
Makefile
…
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
…
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
…
ring_buffer_benchmark.c
…
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
…
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
…
trace_btf.c
…
trace_btf.h
…
trace_clock.c
…
trace_dynevent.c
…
trace_dynevent.h
…
trace_entries.h
…
trace_eprobe.c
…
trace_event_perf.c
…
trace_events_filter_test.h
…
trace_events_filter.c
…
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
…
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
…
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
…
trace_kprobe_selftest.c
…
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
…
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
…
trace_preemptirq.c
…
trace_printk.c
…
trace_probe_kernel.h
…
trace_probe_tmpl.h
…
trace_probe.c
tracing/probes: fix error check in parse_btf_field()
2024-05-27 21:32:35 +09:00
trace_probe.h
…
trace_recursion_record.c
…
trace_sched_switch.c
…
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_stack.c
sysctl: treewide: constify the ctl_table argument of proc_handlers
2024-07-24 20:59:29 +02:00
trace_stat.c
…
trace_stat.h
…
trace_synth.h
…
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
Merge tag 'probes-v6.12' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
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
…