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CONFIG_DEBUG_LOCK_ALLOC: Lock debugging: detect incorrect freeing of live locks

General informations

The Linux kernel configuration item CONFIG_DEBUG_LOCK_ALLOC:

• prompt: Lock debugging: detect incorrect freeing of live locks
• type: bool
• depends on: CONFIG_DEBUG_KERNEL && CONFIG_TRACE_IRQFLAGS_SUPPORT && CONFIG_STACKTRACE_SUPPORT && CONFIG_LOCKDEP_SUPPORT
• defined in lib/Kconfig.debug
• found in Linux kernels: 2.6.18–2.6.39, 3.0–3.9, 3.10-rc+HEAD

Help text

This feature will check whether any held lock (spinlock, rwlock, mutex or rwsem) is incorrectly freed by the kernel, via any of the memory-freeing routines (kfree(), kmem_cache_free(), free_pages(), vfree(), etc.), whether a live lock is incorrectly reinitialized via spin_lock_init()/mutex_init()/etc., or whether there is any lock held during task exit.

Hardware

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The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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