97587080ea
- Use spinlock_enter()/spinlock_exit() to prevent a thread holding a debug lock from being preempted to prevent other threads waiting on that lock from starvation. - Handle the possibility of CPU migration in between the fetch of curcpu and the call to spinlock_enter() by saving curcpu in a local variable. - Use memory barriers to prevent reordering of loads and stores of the data protected by the lock outside of the critical section - Eliminate false sharing of the locks by moving them into the structures that they protect and aligning them to a cacheline boundary. - Record the owning thread in the lock to make debugging future problems easier. Reviewed by: rpaulo (initial version) MFC after: 2 weeks |
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cyclic | ||
dtmalloc | ||
dtrace | ||
fbt | ||
lockstat | ||
profile | ||
sdt | ||
systrace | ||
prototype.c |