Daniel, is unfortunately no longer the maintainer of this code:
https://lwn.net/Articles/979912/ I'll try to take a look at this next week. Thanks, -- Steve On Tue, 24 Sep 2024 17:45:10 +0800 Wei Li <liwei...@huawei.com> wrote: > These issues are found in concurrent CPU-hotplug and tracer-toggling > testing, the test cases are as follows: > > Background: *test_hotplug.sh* > ``` > #!/bin/sh > > while true > do > echo 0 > /sys/devices/system/cpu/cpu1/online > echo 1 > /sys/devices/system/cpu/cpu1/online > done > ``` > > Test 1: *test_timerlat.sh* > ``` > #!/bin/sh > > while true > do > echo timerlat > /sys/kernel/debug/tracing/current_tracer > echo nop > /sys/kernel/debug/tracing/current_tracer > done > ``` > > Test 2: *test_hwlat.sh* > ``` > #!/bin/sh > > echo per-cpu > /sys/kernel/debug/tracing/hwlat_detector/mode > while true > do > echo hwlat > /sys/kernel/debug/tracing/current_tracer > echo nop > /sys/kernel/debug/tracing/current_tracer > done > ``` > > Wei Li (5): > tracing/timerlat: Fix duplicated kthread creation due to CPU > online/offline > tracing/timerlat: Drop interface_lock in stop_kthread() > tracing/timerlat: Fix a race during cpuhp processing > tracing/hwlat: Fix a race during cpuhp processing > tracing/hwlat: Fix deadlock in cpuhp processing > > kernel/trace/trace_hwlat.c | 5 ++++- > kernel/trace/trace_osnoise.c | 22 +++++++++++++--------- > 2 files changed, 17 insertions(+), 10 deletions(-) >
