+ hung_task-update-detect_hung_task_blocker-kconfig-help.patch added to mm-nonmm-unstable branch
Andrew Morton <[email protected]> Thu, 30 Jul 2026 13:32:08 -0700
| Newsgroups | org.kernel.vger.mm-commits |
|---|---|
| Message-ID | <[email protected]> |
The patch titled
Subject: hung_task: update DETECT_HUNG_TASK_BLOCKER Kconfig help
has been added to the -mm mm-nonmm-unstable branch. Its filename is
hung_task-update-detect_hung_task_blocker-kconfig-help.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/hung_task-update-detect_hung_task_blocker-kconfig-help.patch
This patch will later appear in the mm-nonmm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Xibo Wang <[email protected]>
Subject: hung_task: update DETECT_HUNG_TASK_BLOCKER Kconfig help
Date: Thu, 30 Jul 2026 14:18:54 +0800
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/[email protected]
Cc: Petr Mladek <[email protected]>
Signed-off-by: Xibo Wang <[email protected]>
Suggested-by: Lance Yang <[email protected]>
Reviewed-by: Lance Yang <[email protected]>
Cc: "Masami Hiramatsu (Google)" <[email protected]>
Cc: Petr Mladek <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
---
lib/Kconfig.debug | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
--- a/lib/Kconfig.debug~hung_task-update-detect_hung_task_blocker-kconfig-help
+++ a/lib/Kconfig.debug
@@ -1292,10 +1292,10 @@ 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"
_
Patches currently in -mm which might be from [email protected] are
hung_task-update-detect_hung_task_blocker-kconfig-help.patch