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9544f9e694
The hung_task_panic sysctl is currently a blunt instrument: it's all or nothing. Panicking on a single hung task can be an overreaction to a transient glitch. A more reliable indicator of a systemic problem is when multiple tasks hang simultaneously. Extend hung_task_panic to accept an integer threshold, allowing the kernel to panic only when N hung tasks are detected in a single scan. This provides finer control to distinguish between isolated incidents and system-wide failures. The accepted values are: - 0: Don't panic (unchanged) - 1: Panic on the first hung task (unchanged) - N > 1: Panic after N hung tasks are detected in a single scan The original behavior is preserved for values 0 and 1, maintaining full backward compatibility. [lance.yang@linux.dev: new changelog] Link: https://lkml.kernel.org/r/20251015063615.2632-1-lirongqing@baidu.com Signed-off-by: Li RongQing <lirongqing@baidu.com> Reviewed-by: Masami Hiramatsu (Google) <mhiramat@kernel.org> Reviewed-by: Lance Yang <lance.yang@linux.dev> Tested-by: Lance Yang <lance.yang@linux.dev> Acked-by: Andrew Jeffery <andrew@codeconstruct.com.au> [aspeed_g5_defconfig] Cc: Anshuman Khandual <anshuman.khandual@arm.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: David Hildenbrand <david@redhat.com> Cc: Florian Wesphal <fw@strlen.de> Cc: Jakub Kacinski <kuba@kernel.org> Cc: Jason A. Donenfeld <jason@zx2c4.com> Cc: Joel Granados <joel.granados@kernel.org> Cc: Joel Stanley <joel@jms.id.au> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Kees Cook <kees@kernel.org> Cc: Liam Howlett <liam.howlett@oracle.com> Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Cc: "Paul E . McKenney" <paulmck@kernel.org> Cc: Pawan Gupta <pawan.kumar.gupta@linux.intel.com> Cc: Petr Mladek <pmladek@suse.com> Cc: Phil Auld <pauld@redhat.com> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Shuah Khan <shuah@kernel.org> Cc: Simon Horman <horms@kernel.org> Cc: Stanislav Fomichev <sdf@fomichev.me> Cc: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
120 lines
2.7 KiB
Plaintext
120 lines
2.7 KiB
Plaintext
# Help: Debugging for CI systems and finding regressions
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#
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# The config is based on running daily CI for enterprise Linux distros to
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# seek regressions on linux-next builds on different bare-metal and virtual
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# platforms. It can be used for example,
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#
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# $ make ARCH=arm64 defconfig debug.config
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#
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# Keep alphabetically sorted inside each section.
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#
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# printk and dmesg options
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#
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CONFIG_DEBUG_BUGVERBOSE=y
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CONFIG_DYNAMIC_DEBUG=y
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CONFIG_PRINTK_CALLER=y
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CONFIG_PRINTK_TIME=y
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CONFIG_SYMBOLIC_ERRNAME=y
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#
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# Compile-time checks and compiler options
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#
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CONFIG_DEBUG_INFO=y
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CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
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CONFIG_DEBUG_SECTION_MISMATCH=y
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CONFIG_FRAME_WARN=2048
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CONFIG_SECTION_MISMATCH_WARN_ONLY=y
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#
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# Generic Kernel Debugging Instruments
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#
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# CONFIG_UBSAN_ALIGNMENT is not set
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# CONFIG_UBSAN_DIV_ZERO is not set
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# CONFIG_UBSAN_TRAP is not set
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# CONFIG_WARN_ALL_UNSEEDED_RANDOM is not set
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CONFIG_DEBUG_FS=y
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CONFIG_DEBUG_FS_ALLOW_ALL=y
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CONFIG_DEBUG_IRQFLAGS=y
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CONFIG_UBSAN=y
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CONFIG_UBSAN_BOOL=y
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CONFIG_UBSAN_BOUNDS=y
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CONFIG_UBSAN_ENUM=y
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CONFIG_UBSAN_SHIFT=y
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CONFIG_UBSAN_UNREACHABLE=y
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#
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# Networking Debugging
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#
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CONFIG_NET_DEV_REFCNT_TRACKER=y
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CONFIG_NET_NS_REFCNT_TRACKER=y
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CONFIG_DEBUG_NET=y
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#
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# Memory Debugging
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#
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# CONFIG_DEBUG_PAGEALLOC is not set
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# CONFIG_DEBUG_KMEMLEAK_DEFAULT_OFF is not set
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# CONFIG_DEBUG_RODATA_TEST is not set
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# CONFIG_DEBUG_WX is not set
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# CONFIG_KFENCE is not set
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# CONFIG_PAGE_POISONING is not set
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# CONFIG_SLUB_STATS is not set
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CONFIG_PAGE_EXTENSION=y
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CONFIG_PAGE_OWNER=y
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CONFIG_DEBUG_KMEMLEAK=y
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CONFIG_DEBUG_KMEMLEAK_AUTO_SCAN=y
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CONFIG_DEBUG_OBJECTS=y
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CONFIG_DEBUG_OBJECTS_ENABLE_DEFAULT=1
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CONFIG_DEBUG_OBJECTS_FREE=y
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CONFIG_DEBUG_OBJECTS_PERCPU_COUNTER=y
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CONFIG_DEBUG_OBJECTS_RCU_HEAD=y
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CONFIG_DEBUG_OBJECTS_TIMERS=y
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CONFIG_DEBUG_OBJECTS_WORK=y
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CONFIG_DEBUG_PER_CPU_MAPS=y
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CONFIG_DEBUG_STACK_USAGE=y
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CONFIG_DEBUG_VIRTUAL=y
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CONFIG_DEBUG_VM=y
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CONFIG_DEBUG_VM_PGFLAGS=y
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CONFIG_DEBUG_VM_RB=y
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CONFIG_DEBUG_VM_VMACACHE=y
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CONFIG_KASAN=y
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CONFIG_KASAN_GENERIC=y
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CONFIG_KASAN_INLINE=y
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CONFIG_KASAN_VMALLOC=y
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CONFIG_PTDUMP_DEBUGFS=y
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CONFIG_SCHED_STACK_END_CHECK=y
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CONFIG_SLUB_DEBUG_ON=y
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#
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# Debug Oops, Lockups and Hangs
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#
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CONFIG_BOOTPARAM_HUNG_TASK_PANIC=0
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# CONFIG_BOOTPARAM_SOFTLOCKUP_PANIC is not set
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CONFIG_DEBUG_ATOMIC_SLEEP=y
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CONFIG_DETECT_HUNG_TASK=y
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CONFIG_PANIC_ON_OOPS=y
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CONFIG_PANIC_TIMEOUT=0
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CONFIG_SOFTLOCKUP_DETECTOR=y
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#
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# Lock Debugging (spinlocks, mutexes, etc...)
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#
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# CONFIG_PROVE_RAW_LOCK_NESTING is not set
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CONFIG_PROVE_LOCKING=y
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#
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# Debug kernel data structures
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#
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CONFIG_BUG_ON_DATA_CORRUPTION=y
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#
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# RCU Debugging
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#
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CONFIG_RCU_EXPERT=y
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CONFIG_PROVE_RCU=y
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CONFIG_PROVE_RCU_LIST=y
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#
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# Tracers
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#
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CONFIG_BRANCH_PROFILE_NONE=y
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CONFIG_DYNAMIC_FTRACE=y
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CONFIG_FTRACE=y
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CONFIG_FUNCTION_TRACER=y
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#
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# Preemption
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#
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CONFIG_DEBUG_PREEMPT=y
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CONFIG_PREEMPT=y
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