This is a note to let you know that I've just added the patch titled
parisc: Suspend lockup detectors before system halt
to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
parisc-suspend-lockup-detectors-before-system-halt.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 56188832a50f09998cb570ba3771a1d25c193c0e Mon Sep 17 00:00:00 2001
From: Helge Deller <deller@xxxxxx>
Date: Tue, 25 Jul 2017 21:41:41 +0200
Subject: parisc: Suspend lockup detectors before system halt
From: Helge Deller <deller@xxxxxx>
commit 56188832a50f09998cb570ba3771a1d25c193c0e upstream.
Some machines can't power off the machine, so disable the lockup detectors to
avoid this watchdog BUG to show up every few seconds:
watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [systemd-shutdow:1]
Signed-off-by: Helge Deller <deller@xxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/parisc/kernel/process.c | 2 ++
1 file changed, 2 insertions(+)
--- a/arch/parisc/kernel/process.c
+++ b/arch/parisc/kernel/process.c
@@ -50,6 +50,7 @@
#include <linux/uaccess.h>
#include <linux/rcupdate.h>
#include <linux/random.h>
+#include <linux/nmi.h>
#include <asm/io.h>
#include <asm/asm-offsets.h>
@@ -142,6 +143,7 @@ void machine_power_off(void)
/* prevent soft lockup/stalled CPU messages for endless loop. */
rcu_sysrq_start();
+ lockup_detector_suspend();
for (;;);
}
Patches currently in stable-queue which might be from deller@xxxxxx are
queue-4.9/parisc-suspend-lockup-detectors-before-system-halt.patch
queue-4.9/parisc-prevent-tlb-speculation-on-flushed-pages-on-cpus-that-only-support-equivalent-aliases.patch
queue-4.9/parisc-extend-disabled-preemption-in-copy_user_page.patch