Messages in this thread | | | Subject | Re: [PATCH v5] x86/hpet: Reduce HPET counter read contention | From | Dave Hansen <> | Date | Fri, 12 Aug 2016 14:38:59 -0700 |
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On 08/12/2016 02:25 PM, Waiman Long wrote: > + * The lock and the hpet value are stored together and can be read in a > + * single atomic 64-bit read. It is explicitly assumed that the raw spinlock > + * size is 32-bit.
So what happens when we have all the fun debugging options on?
> typedef struct raw_spinlock { > arch_spinlock_t raw_lock; > #ifdef CONFIG_GENERIC_LOCKBREAK > unsigned int break_lock; > #endif > #ifdef CONFIG_DEBUG_SPINLOCK > unsigned int magic, owner_cpu; > void *owner; > #endif > #ifdef CONFIG_DEBUG_LOCK_ALLOC > struct lockdep_map dep_map; > #endif > } raw_spinlock_t;
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