diff options
| author | David S. Miller <davem@davemloft.net> | 2010-05-18 23:01:55 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-05-18 23:01:55 -0700 |
| commit | 2ec8c6bb5d8f3a62a79f463525054bae1e3d4487 (patch) | |
| tree | fa7f8400ac685fb52e96f64997c7c682fc2aa021 /kernel/lockdep_internals.h | |
| parent | 7b39f90fabcf9e2af0cd79d0a60440d821e22b56 (diff) | |
| parent | 537b60d17894b7c19a6060feae40299d7109d6e7 (diff) | |
| download | kernel-crypto-2ec8c6bb5d8f3a62a79f463525054bae1e3d4487.tar.gz kernel-crypto-2ec8c6bb5d8f3a62a79f463525054bae1e3d4487.tar.xz kernel-crypto-2ec8c6bb5d8f3a62a79f463525054bae1e3d4487.zip | |
Merge branch 'master' of /home/davem/src/GIT/linux-2.6/
Conflicts:
include/linux/mod_devicetable.h
scripts/mod/file2alias.c
Diffstat (limited to 'kernel/lockdep_internals.h')
| -rw-r--r-- | kernel/lockdep_internals.h | 72 |
1 files changed, 51 insertions, 21 deletions
diff --git a/kernel/lockdep_internals.h b/kernel/lockdep_internals.h index a2ee95ad131..4f560cfedc8 100644 --- a/kernel/lockdep_internals.h +++ b/kernel/lockdep_internals.h @@ -110,30 +110,60 @@ lockdep_count_backward_deps(struct lock_class *class) #endif #ifdef CONFIG_DEBUG_LOCKDEP + +#include <asm/local.h> /* - * Various lockdep statistics: + * Various lockdep statistics. + * We want them per cpu as they are often accessed in fast path + * and we want to avoid too much cache bouncing. */ -extern atomic_t chain_lookup_hits; -extern atomic_t chain_lookup_misses; -extern atomic_t hardirqs_on_events; -extern atomic_t hardirqs_off_events; -extern atomic_t redundant_hardirqs_on; -extern atomic_t redundant_hardirqs_off; -extern atomic_t softirqs_on_events; -extern atomic_t softirqs_off_events; -extern atomic_t redundant_softirqs_on; -extern atomic_t redundant_softirqs_off; -extern atomic_t nr_unused_locks; -extern atomic_t nr_cyclic_checks; -extern atomic_t nr_cyclic_check_recursions; -extern atomic_t nr_find_usage_forwards_checks; -extern atomic_t nr_find_usage_forwards_recursions; -extern atomic_t nr_find_usage_backwards_checks; -extern atomic_t nr_find_usage_backwards_recursions; -# define debug_atomic_inc(ptr) atomic_inc(ptr) -# define debug_atomic_dec(ptr) atomic_dec(ptr) -# define debug_atomic_read(ptr) atomic_read(ptr) +struct lockdep_stats { + int chain_lookup_hits; + int chain_lookup_misses; + int hardirqs_on_events; + int hardirqs_off_events; + int redundant_hardirqs_on; + int redundant_hardirqs_off; + int softirqs_on_events; + int softirqs_off_events; + int redundant_softirqs_on; + int redundant_softirqs_off; + int nr_unused_locks; + int nr_cyclic_checks; + int nr_cyclic_check_recursions; + int nr_find_usage_forwards_checks; + int nr_find_usage_forwards_recursions; + int nr_find_usage_backwards_checks; + int nr_find_usage_backwards_recursions; +}; + +DECLARE_PER_CPU(struct lockdep_stats, lockdep_stats); + +#define __debug_atomic_inc(ptr) \ + this_cpu_inc(lockdep_stats.ptr); + +#define debug_atomic_inc(ptr) { \ + WARN_ON_ONCE(!irqs_disabled()); \ + __this_cpu_inc(lockdep_stats.ptr); \ +} + +#define debug_atomic_dec(ptr) { \ + WARN_ON_ONCE(!irqs_disabled()); \ + __this_cpu_dec(lockdep_stats.ptr); \ +} + +#define debug_atomic_read(ptr) ({ \ + struct lockdep_stats *__cpu_lockdep_stats; \ + unsigned long long __total = 0; \ + int __cpu; \ + for_each_possible_cpu(__cpu) { \ + __cpu_lockdep_stats = &per_cpu(lockdep_stats, __cpu); \ + __total += __cpu_lockdep_stats->ptr; \ + } \ + __total; \ +}) #else +# define __debug_atomic_inc(ptr) do { } while (0) # define debug_atomic_inc(ptr) do { } while (0) # define debug_atomic_dec(ptr) do { } while (0) # define debug_atomic_read(ptr) 0 |