config: Add option for lockup and hung detection

These options allow it to build the kernel with soft lockup detection
and with huge task detection. This could help to debug some problems in
the kernel.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

diff --git a/config/Config-kernel.in b/config/Config-kernel.in
index 0cbe5e8351a5a80171c0aa6f72c4782f44a3a0be..21e5b98f3ff607fcf783c705f4803a18bcc84ae2 100644 (file)
--- a/config/Config-kernel.in
+++ b/config/Config-kernel.in
@@ -212,6 +212,37 @@ config KERNEL_PROVE_LOCKING
        select KERNEL_DEBUG_KERNEL
        default n
 
+config KERNEL_LOCKUP_DETECTOR
+       bool
+
+config KERNEL_SOFTLOCKUP_DETECTOR
+       bool "Compile the kernel with Soft Lockup detection"
+       depends on KERNEL_DEBUG_KERNEL
+       select KERNEL_LOCKUP_DETECTOR
+       help
+         Say Y here to enable the kernel to act as a watchdog to detect
+         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.
+
+config KERNEL_DETECT_HUNG_TASK
+       bool "Compile the kernel with Hung Tasks detection"
+       depends on KERNEL_DEBUG_KERNEL
+       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
+         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_PRINTK_TIME
        bool "Enable printk timestamps"
        default y

diff --git a/target/linux/generic/config-3.18 b/target/linux/generic/config-3.18
index 04245531f603f2f2023250e103ae641b356bef28..cdba91f1bca9dd2c7d172d217c70f309691aafe2 100644 (file)
--- a/target/linux/generic/config-3.18
+++ b/target/linux/generic/config-3.18
@@ -479,6 +479,8 @@ 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_BOOTPARAM_SOFTLOCKUP_PANIC is not set
 # CONFIG_BOOT_PRINTK_DELAY is not set
 CONFIG_BOOT_RAW=y
 # CONFIG_BPCTL is not set
@@ -860,6 +862,7 @@ 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_MESSAGE_LOGLEVEL=4
 CONFIG_DEFAULT_MMAP_MIN_ADDR=4096

diff --git a/target/linux/generic/config-4.14 b/target/linux/generic/config-4.14
index 48c7f3170326844fbb8f8389c4c4268d39d00080..be2e29010dff7c48cca105aaa1911c8ec1bf70da 100644 (file)
--- a/target/linux/generic/config-4.14
+++ b/target/linux/generic/config-4.14
@@ -588,6 +588,8 @@ 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_BOOTPARAM_SOFTLOCKUP_PANIC is not set
 # CONFIG_BOOT_PRINTK_DELAY is not set
 CONFIG_BOOT_RAW=y
 CONFIG_BPF=y
@@ -1069,6 +1071,7 @@ 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-4.4 b/target/linux/generic/config-4.4
index 3285000eb436f91386d4b3288846b3ec64eac2a9..708122b42049a8af022ee4d7831468421efb0110 100644 (file)
--- a/target/linux/generic/config-4.4
+++ b/target/linux/generic/config-4.4
@@ -489,6 +489,8 @@ 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_BOOTPARAM_SOFTLOCKUP_PANIC is not set
 # CONFIG_BOOT_PRINTK_DELAY is not set
 CONFIG_BOOT_RAW=y
 CONFIG_BPF=y
@@ -905,6 +907,7 @@ 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-4.9 b/target/linux/generic/config-4.9
index 3f050c205cd4946eced80e667af1442857deba8c..5e866913b004675dac85708fd209937f989d6751 100644 (file)
--- a/target/linux/generic/config-4.9
+++ b/target/linux/generic/config-4.9
@@ -562,6 +562,8 @@ 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_BOOTPARAM_SOFTLOCKUP_PANIC is not set
 # CONFIG_BOOT_PRINTK_DELAY is not set
 CONFIG_BOOT_RAW=y
 CONFIG_BPF=y
@@ -692,8 +694,8 @@ CONFIG_CC_STACKPROTECTOR_NONE=y
 # CONFIG_CFG80211_CERTIFICATION_ONUS is not set
 # CONFIG_CGROUPS is not set
 # CONFIG_CGROUP_DEBUG is not set
-# CONFIG_CGROUP_NET_PRIO is not set
 # CONFIG_CGROUP_NET_CLASSID is not set
+# CONFIG_CGROUP_NET_PRIO is not set
 # CONFIG_CHARGER_BQ2415X is not set
 # CONFIG_CHARGER_BQ24190 is not set
 # CONFIG_CHARGER_BQ24257 is not set
@@ -1007,6 +1009,7 @@ 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