2158599a - samples: add hung_task detector mutex blocking sample

Tue, 25 Feb 2025 07:00:00 +0000

samples: add hung_task detector mutex blocking sampleAdd a hung_task detector mutex blocking test sample code.This module will create a dummy file on the debugfs. That file will causethe read process to sleep for enough long time (256 seconds) while holdinga mutex. As a result, the second process will wait on the mutex for aprolonged duration and be detected by the hung_task detector.Usage is; > cd /sys/kernel/debug/hung_task > cat mutex & cat mutexand 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.comSigned-off-by: Masami Hiramatsu (Google) Cc: Anna Schumaker Cc: Boqun Feng Cc: Ingo Molnar Cc: Joel Granados Cc: Kent Overstreet Cc: Lance Yang Cc: Sergey Senozhatsky Cc: Steven Rostedt Cc: Tomasz Figa Cc: Waiman Long Cc: Will Deacon Cc: Yongliang Gao Signed-off-by: Andrew Morton List of files: /linux-6.15/samples/hung_task/Makefile/linux-6.15/samples/hung_task/hung_task_mutex.c

Changes in hung_task

2158599a - samples: add hung_task detector mutex blocking sample