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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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9bb25bf36f
Miles Lane reported the "BUG: MAX_STACK_TRACE_ENTRIES too low!" message, which means that during normal use his system produced enough lockdep events so that the 128-thousand entries stack-trace array got exhausted. Double the size of the array. Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: Miles Lane <miles.lane@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
79 lines
2.4 KiB
C
79 lines
2.4 KiB
C
/*
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* kernel/lockdep_internals.h
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*
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* Runtime locking correctness validator
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*
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* lockdep subsystem internal functions and variables.
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*/
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/*
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* MAX_LOCKDEP_ENTRIES is the maximum number of lock dependencies
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* we track.
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*
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* We use the per-lock dependency maps in two ways: we grow it by adding
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* every to-be-taken lock to all currently held lock's own dependency
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* table (if it's not there yet), and we check it for lock order
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* conflicts and deadlocks.
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*/
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#define MAX_LOCKDEP_ENTRIES 8192UL
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#define MAX_LOCKDEP_KEYS_BITS 11
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#define MAX_LOCKDEP_KEYS (1UL << MAX_LOCKDEP_KEYS_BITS)
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#define MAX_LOCKDEP_CHAINS_BITS 13
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#define MAX_LOCKDEP_CHAINS (1UL << MAX_LOCKDEP_CHAINS_BITS)
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/*
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* Stack-trace: tightly packed array of stack backtrace
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* addresses. Protected by the hash_lock.
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*/
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#define MAX_STACK_TRACE_ENTRIES 262144UL
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extern struct list_head all_lock_classes;
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extern void
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get_usage_chars(struct lock_class *class, char *c1, char *c2, char *c3, char *c4);
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extern const char * __get_key_name(struct lockdep_subclass_key *key, char *str);
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extern unsigned long nr_lock_classes;
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extern unsigned long nr_list_entries;
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extern unsigned long nr_lock_chains;
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extern unsigned long nr_stack_trace_entries;
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extern unsigned int nr_hardirq_chains;
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extern unsigned int nr_softirq_chains;
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extern unsigned int nr_process_chains;
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extern unsigned int max_lockdep_depth;
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extern unsigned int max_recursion_depth;
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#ifdef CONFIG_DEBUG_LOCKDEP
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/*
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* Various lockdep statistics:
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*/
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extern atomic_t chain_lookup_hits;
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extern atomic_t chain_lookup_misses;
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extern atomic_t hardirqs_on_events;
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extern atomic_t hardirqs_off_events;
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extern atomic_t redundant_hardirqs_on;
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extern atomic_t redundant_hardirqs_off;
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extern atomic_t softirqs_on_events;
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extern atomic_t softirqs_off_events;
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extern atomic_t redundant_softirqs_on;
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extern atomic_t redundant_softirqs_off;
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extern atomic_t nr_unused_locks;
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extern atomic_t nr_cyclic_checks;
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extern atomic_t nr_cyclic_check_recursions;
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extern atomic_t nr_find_usage_forwards_checks;
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extern atomic_t nr_find_usage_forwards_recursions;
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extern atomic_t nr_find_usage_backwards_checks;
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extern atomic_t nr_find_usage_backwards_recursions;
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# define debug_atomic_inc(ptr) atomic_inc(ptr)
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# define debug_atomic_dec(ptr) atomic_dec(ptr)
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# define debug_atomic_read(ptr) atomic_read(ptr)
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#else
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# define debug_atomic_inc(ptr) do { } while (0)
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# define debug_atomic_dec(ptr) do { } while (0)
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# define debug_atomic_read(ptr) 0
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#endif
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