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-rw-r--r--config/Config-kernel.in68
-rw-r--r--target/linux/generic/config-4.145
-rw-r--r--target/linux/generic/config-4.195
3 files changed, 78 insertions, 0 deletions
diff --git a/config/Config-kernel.in b/config/Config-kernel.in
index 5e677e6afd..52e74a175b 100644
--- a/config/Config-kernel.in
+++ b/config/Config-kernel.in
@@ -377,6 +377,74 @@ config KERNEL_PROVE_LOCKING
select KERNEL_DEBUG_KERNEL
default n
+config KERNEL_LOCKUP_DETECTOR
+ bool "Compile the kernel with detect Hard and 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.
+
+ 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
+ help
+ Say Y here to enable the kernel to detect "hung tasks",
+ which are bugs that cause the task to be stuck in
+ uninterruptible "D" state indefinitely.
+
+ When a hung task is detected, the kernel will print the
+ current stack trace (which you should report), but the
+ task will stay in uninterruptible state. If lockdep is
+ enabled then all held locks will also be reported. This
+ feature has negligible overhead.
+
+config KERNEL_WQ_WATCHDOG
+ bool "Compile the kernel with detect Workqueue Stalls"
+ depends on KERNEL_DEBUG_KERNEL
+ help
+ Say Y here to enable stall detection on workqueues. If a
+ worker pool doesn't make forward progress on a pending work
+ item for over a given amount of time, 30s by default, a
+ warning message is printed along with dump of workqueue
+ state. This can be configured through kernel parameter
+ "workqueue.watchdog_thresh" and its sysfs counterpart.
+
+config KERNEL_DEBUG_ATOMIC_SLEEP
+ bool "Compile the kernel with sleep inside atomic section checking"
+ depends on KERNEL_DEBUG_KERNEL
+ help
+ If you say Y here, various routines which may sleep will become very
+ noisy if they are called inside atomic sections: when a spinlock is
+ held, inside an rcu read side critical section, inside preempt disabled
+ sections, inside an interrupt, etc...
+
+config KERNEL_DEBUG_VM
+ bool "Compile the kernel with debug VM"
+ depends on KERNEL_DEBUG_KERNEL
+ help
+ Enable this to turn on extended checks in the virtual-memory system
+ that may impact performance.
+
+ If unsure, say N.
+
config KERNEL_PRINTK_TIME
bool "Enable printk timestamps"
default y
diff --git a/target/linux/generic/config-4.14 b/target/linux/generic/config-4.14
index 5a9b82db80..d1ce30d2f7 100644
--- a/target/linux/generic/config-4.14
+++ b/target/linux/generic/config-4.14
@@ -594,6 +594,7 @@ CONFIG_BLOCK=y
# CONFIG_BONDING is not set
# CONFIG_BOOKE_WDT is not set
CONFIG_BOOKE_WDT_DEFAULT_TIMEOUT=3
+# CONFIG_BOOTPARAM_HUNG_TASK_PANIC is not set
# CONFIG_BOOT_PRINTK_DELAY is not set
CONFIG_BOOT_RAW=y
CONFIG_BPF=y
@@ -1073,6 +1074,9 @@ CONFIG_DEBUG_KERNEL=y
# CONFIG_DEBUG_UART_BCM63XX is not set
# CONFIG_DEBUG_VIRTUAL is not set
# CONFIG_DEBUG_VM is not set
+# CONFIG_DEBUG_VM_PGFLAGS is not set
+# CONFIG_DEBUG_VM_RB is not set
+# CONFIG_DEBUG_VM_VMACACHE is not set
# CONFIG_DEBUG_WQ_FORCE_RR_CPU is not set
# CONFIG_DEBUG_WW_MUTEX_SLOWPATH is not set
# CONFIG_DEBUG_WX is not set
@@ -1081,6 +1085,7 @@ CONFIG_DEBUG_KERNEL=y
CONFIG_DEFAULT_CUBIC=y
CONFIG_DEFAULT_DEADLINE=y
CONFIG_DEFAULT_HOSTNAME="(none)"
+CONFIG_DEFAULT_HUNG_TASK_TIMEOUT=120
CONFIG_DEFAULT_IOSCHED="deadline"
CONFIG_DEFAULT_MMAP_MIN_ADDR=4096
# CONFIG_DEFAULT_NOOP is not set
diff --git a/target/linux/generic/config-4.19 b/target/linux/generic/config-4.19
index 372cad70a6..153520c396 100644
--- a/target/linux/generic/config-4.19
+++ b/target/linux/generic/config-4.19
@@ -617,6 +617,7 @@ CONFIG_BLOCK=y
# CONFIG_BONDING is not set
# CONFIG_BOOKE_WDT is not set
CONFIG_BOOKE_WDT_DEFAULT_TIMEOUT=3
+# CONFIG_BOOTPARAM_HUNG_TASK_PANIC is not set
# CONFIG_BOOT_PRINTK_DELAY is not set
CONFIG_BOOT_RAW=y
CONFIG_BPF=y
@@ -1131,6 +1132,9 @@ CONFIG_DEBUG_KERNEL=y
# CONFIG_DEBUG_UART_BCM63XX is not set
# CONFIG_DEBUG_VIRTUAL is not set
# CONFIG_DEBUG_VM is not set
+# CONFIG_DEBUG_VM_PGFLAGS is not set
+# CONFIG_DEBUG_VM_RB is not set
+# CONFIG_DEBUG_VM_VMACACHE is not set
# CONFIG_DEBUG_WQ_FORCE_RR_CPU is not set
# CONFIG_DEBUG_WW_MUTEX_SLOWPATH is not set
# CONFIG_DEBUG_WX is not set
@@ -1139,6 +1143,7 @@ CONFIG_DEBUG_KERNEL=y
CONFIG_DEFAULT_CUBIC=y
CONFIG_DEFAULT_DEADLINE=y
CONFIG_DEFAULT_HOSTNAME="(none)"
+CONFIG_DEFAULT_HUNG_TASK_TIMEOUT=120
CONFIG_DEFAULT_IOSCHED="deadline"
CONFIG_DEFAULT_MMAP_MIN_ADDR=4096
# CONFIG_DEFAULT_NOOP is not set