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| author | Masami Hiramatsu (Google) <mhiramat@kernel.org> | 2025-02-25 16:02:43 +0900 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2025-03-21 22:10:04 -0700 |
| commit | 2158599a4b6d735e1a57c8320723ca74c42dd7ae (patch) | |
| tree | 9d7d54c9707ff0440035f944d5eac932c374f619 /samples/Makefile | |
| parent | 3cf67d61ff98672120f6ad07528afa165df12588 (diff) | |
| download | ath-2158599a4b6d735e1a57c8320723ca74c42dd7ae.tar.gz | |
samples: add hung_task detector mutex blocking sample
Add a hung_task detector mutex blocking test sample code.
This module will create a dummy file on the debugfs. That file will cause
the read process to sleep for enough long time (256 seconds) while holding
a mutex. As a result, the second process will wait on the mutex for a
prolonged duration and be detected by the hung_task detector.
Usage is;
> cd /sys/kernel/debug/hung_task
> cat mutex & cat mutex
and wait for hung_task message.
[akpm@linux-foundation.org: make `hung_task_dir' static]
Closes: https://lore.kernel.org/oe-kbuild-all/202503180827.4StpuFrD-lkp@intel.com/
Link: https://lkml.kernel.org/r/174046696281.2194069.4567490148001547311.stgit@mhiramat.tok.corp.google.com
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Cc: Anna Schumaker <anna.schumaker@oracle.com>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Joel Granados <joel.granados@kernel.org>
Cc: Kent Overstreet <kent.overstreet@linux.dev>
Cc: Lance Yang <ioworker0@gmail.com>
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Tomasz Figa <tfiga@chromium.org>
Cc: Waiman Long <longman@redhat.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yongliang Gao <leonylgao@tencent.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'samples/Makefile')
| -rw-r--r-- | samples/Makefile | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/samples/Makefile b/samples/Makefile index f24cd0d72dd00..bf6e6fca5410b 100644 --- a/samples/Makefile +++ b/samples/Makefile @@ -42,3 +42,4 @@ obj-$(CONFIG_SAMPLE_FPROBE) += fprobe/ obj-$(CONFIG_SAMPLES_RUST) += rust/ obj-$(CONFIG_SAMPLE_DAMON_WSSE) += damon/ obj-$(CONFIG_SAMPLE_DAMON_PRCL) += damon/ +obj-$(CONFIG_SAMPLE_HUNG_TASK) += hung_task/ |