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SubjectRe: [RFC][PATCH -mm] lockdep.c likely
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On Sun, 2006-07-09 at 14:34 +0200, Michal Piotrowski wrote:
> Hi,
>
> I have noticed this
>
> +unlikely | 53202934| 80576 trace_softirqs_on()@:/usr/src/linux-mm/kernel/lockdep.c@1861
> [..]
> +unlikely | 53202350| 80542 trace_softirqs_off()@:/usr/src/linux-mm/kernel/lockdep.c@1895
> [..]
> +unlikely |272060329| 3784394 trace_hardirqs_on()@:/usr/src/linux-mm/kernel/lockdep.c@1787
> [..]
> +unlikely |361155686| 2959425 check_unlock()@:/usr/src/linux-mm/kernel/lockdep.c@2197
> [..]
> +unlikely | 1821294| 1140788 __lock_acquire()@:/usr/src/linux-mm/kernel/lockdep.c@1977
> unlikely | 0| 2962331 __lock_acquire()@:/usr/src/linux-mm/kernel/lockdep.c@1965
> unlikely | 0| 2962035 __lock_acquire()@:/usr/src/linux-mm/kernel/lockdep.c@1962
> +unlikely |361188304| 2961749 __lock_acquire()@:/usr/src/linux-mm/kernel/lockdep.c@1959
> [..]
> +unlikely | 14528808| 413114 debug_check_no_locks_freed()@:/usr/src/linux-mm/kernel/lockdep.c@2607
> likely | 92394| 156 lock_kernel()@:/usr/src/linux-mm/lib/kernel_lock.c@70
> unlikely | 0| 305177 lockdep_init_map()@:/usr/src/linux-mm/kernel/lockdep.c@1927
> unlikely | 0| 305177 lockdep_init_map()@:/usr/src/linux-mm/kernel/lockdep.c@1925
> +unlikely | 2156369| 305176 lockdep_init_map()@:/usr/src/linux-mm/kernel/lockdep.c@1922
> unlikely | 0| 4412613 trace_hardirqs_off()@:/usr/src/linux-mm/kernel/lockdep.c@1837
> +unlikely |319757688| 4409721 trace_hardirqs_off()@:/usr/src/linux-mm/kernel/lockdep.c@1834
>
> in /proc/likely_prof
>
> I'm not sure of it, but patch below should optimalize it.


this is only likely after you've hit a lockdep message though..

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