From d27f6e2c5d2a2315cc8fe684d117c80aa9984ca8 Mon Sep 17 00:00:00 2001 From: Hauke Mehrtens Date: Sun, 12 Sep 2021 12:56:48 +0200 Subject: [PATCH] build: Replace KERNEL_LOCKUP_DETECTOR with KERNEL_SOFTLOCKUP_DETECTOR The LOCKUP_DETECTOR configuration option split into the SOFTLOCKUP_DETECTOR and HARDLOCKUP_DETECTOR configuration option some time ago. The HARDLOCKUP_DETECTOR option is only working on some architectures, but SOFTLOCKUP_DETECTOR should work everywhere. Replace KERNEL_LOCKUP_DETECTOR with KERNEL_SOFTLOCKUP_DETECTOR. LOCKUP_DETECTOR will be selected by SOFTLOCKUP_DETECTOR automatically. Fixes: b951f53fbae3 ("build: Add additional kernel debug options") Signed-off-by: Hauke Mehrtens --- config/Config-kernel.in | 20 ++++---------------- 1 file changed, 4 insertions(+), 16 deletions(-) diff --git a/config/Config-kernel.in b/config/Config-kernel.in index f71114b5daa8..d4648a506444 100644 --- a/config/Config-kernel.in +++ b/config/Config-kernel.in @@ -436,34 +436,22 @@ config KERNEL_PROVE_LOCKING select KERNEL_DEBUG_KERNEL default n -config KERNEL_LOCKUP_DETECTOR - bool "Compile the kernel with detect Hard and Soft Lockups" +config KERNEL_SOFTLOCKUP_DETECTOR + bool "Compile the kernel with detect Soft Lockups" depends on KERNEL_DEBUG_KERNEL help Say Y here to enable the kernel to act as a watchdog to detect - hard and soft lockups. + soft lockups. Softlockups are bugs that cause the kernel to loop in kernel mode for more than 20 seconds, without giving other tasks a chance to run. The current stack trace is displayed upon detection and the system will stay locked up. - Hardlockups are bugs that cause the CPU to loop in kernel mode - for more than 10 seconds, without letting other interrupts have a - chance to run. The current stack trace is displayed upon detection - and the system will stay locked up. - - The overhead should be minimal. A periodic hrtimer runs to - generate interrupts and kick the watchdog task every 4 seconds. - An NMI is generated every 10 seconds or so to check for hardlockups. - - The frequency of hrtimer and NMI events and the soft and hard lockup - thresholds can be controlled through the sysctl watchdog_thresh. - config KERNEL_DETECT_HUNG_TASK bool "Compile the kernel with detect Hung Tasks" depends on KERNEL_DEBUG_KERNEL - default KERNEL_LOCKUP_DETECTOR + default KERNEL_SOFTLOCKUP_DETECTOR help Say Y here to enable the kernel to detect "hung tasks", which are bugs that cause the task to be stuck in -- 2.30.2