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| author | Xibo Wang <wangxb12@chinatelecom.cn> | 2026-07-30 14:18:54 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2026-08-13 15:42:06 -0700 |
| commit | aa27e55f24402ab7de5dc2593b54145f9b6dc3fe (patch) | |
| tree | f9a656fe246382e26f22516af63d7da3159a5eff /lib | |
| parent | c4904c4ae33c5f76c10b03a2283e47d8a6736941 (diff) | |
| download | lwn-aa27e55f24402ab7de5dc2593b54145f9b6dc3fe.tar.gz lwn-aa27e55f24402ab7de5dc2593b54145f9b6dc3fe.zip | |
hung_task: update DETECT_HUNG_TASK_BLOCKER Kconfig help
The help text still says the feature only covers mutexes, but blocker
tracking has since been extended to semaphores and rwsems. Update the
description to match the supported lock types.
Link: https://lore.kernel.org/20260730061854.176547-1-wangxb12@chinatelecom.cn
Cc: Petr Mladek <pmladek@suse.com>
Signed-off-by: Xibo Wang <wangxb12@chinatelecom.cn>
Suggested-by: Lance Yang <lance.yang@linux.dev>
Reviewed-by: Lance Yang <lance.yang@linux.dev>
Cc: "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
Cc: Petr Mladek <pmladek@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Kconfig.debug | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 2a6be1af94a3..31a61c83d023 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -1320,10 +1320,10 @@ config DETECT_HUNG_TASK_BLOCKER depends on !PREEMPT_RT default y help - Say Y here to show the blocker task's stacktrace who acquires - the mutex lock which "hung tasks" are waiting. - This will add overhead a bit but shows suspicious tasks and - call trace if it comes from waiting a mutex. + Say Y here to show a possible blocker task's stacktrace when + a hung task is waiting on a mutex, semaphore, or rwsem. + This will add a bit of overhead but shows suspicious tasks and + call traces for waits on one of these locks. config WQ_WATCHDOG bool "Detect Workqueue Stalls" |