From: "Nysal Jan K.A." <nysal@linux•ibm.com>
To: Andrew Morton <akpm@linux-foundation•org>,
Stephen Rothwell <sfr@canb•auug.org.au>,
Venkat Rao Bagalkote <venkat88@linux•ibm.com>
Cc: luogengkun@huaweicloud•com, dianders@chromium•org,
joel.granados@kernel•org, song@kernel•org,
Thomas Gleixner <tglx@linutronix•de>,
Madhavan Srinivasan <maddy@linux•ibm.com>,
LKML <linux-kernel@vger•kernel.org>,
Linux Next Mailing List <linux-next@vger•kernel.org>,
linuxppc-dev@lists•ozlabs.org,
"Nysal Jan K.A." <nysal@linux•ibm.com>
Subject: [PATCH] watchdog: Fix the SOFTLOCKUP_DETECTOR=n case
Date: Fri, 2 May 2025 16:41:20 +0530 [thread overview]
Message-ID: <20250502111120.282690-1-nysal@linux.ibm.com> (raw)
In-Reply-To: <20250430205503.4a316f48@canb.auug.org.au>
Update watchdog_thresh when SOFTLOCKUP_DETECTOR=n.
Additionally fix a build failure in this case as well.
Fixes: 0bff3dababb07 ("watchdog: fix watchdog may detect false positive of softlockup")
Reported-by: Venkat Rao Bagalkote <venkat88@linux•ibm.com>
Closes: https://lore.kernel.org/all/339e2b3e-c7ee-418f-a84c-9c6360dc570b@linux.ibm.com
Signed-off-by: Nysal Jan K.A. <nysal@linux•ibm.com>
---
The "Fixes:" SHA1 points to the commit in mm-nonmm-unstable and will need updating
kernel/watchdog.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/kernel/watchdog.c b/kernel/watchdog.c
index 80d1a1dae27..2d283e92be5 100644
--- a/kernel/watchdog.c
+++ b/kernel/watchdog.c
@@ -923,10 +923,12 @@ static __init void lockup_detector_setup(void)
}
#else /* CONFIG_SOFTLOCKUP_DETECTOR */
-static void __lockup_detector_reconfigure(void)
+static void __lockup_detector_reconfigure(bool thresh_changed)
{
cpus_read_lock();
watchdog_hardlockup_stop();
+ if (thresh_changed)
+ watchdog_thresh = READ_ONCE(watchdog_thresh_next);
lockup_detector_update_enable();
watchdog_hardlockup_start();
cpus_read_unlock();
--
2.47.0
next prev parent reply other threads:[~2025-05-02 11:12 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-04-26 15:09 [linux-next]Build Failure: kernel/watchdog.c:936:2: error: too many arguments Venkat Rao Bagalkote
2025-04-27 22:41 ` Stephen Rothwell
2025-04-28 6:13 ` Venkat Rao Bagalkote
2025-04-28 9:41 ` Venkat Rao Bagalkote
2025-04-30 6:27 ` Venkat Rao Bagalkote
2025-04-30 10:55 ` Stephen Rothwell
2025-05-02 11:11 ` Nysal Jan K.A. [this message]
2025-05-02 12:00 ` [PATCH] watchdog: Fix the SOFTLOCKUP_DETECTOR=n case Venkat Rao Bagalkote
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