Adi s
Reputation: 31
Contention for semaphore by two processes executing down_interruptible call simultaeously
Is it possible that a semaphore with an initial value of 1 be acquired simultaneously by two processes which are running on different processor cores via the down_interruptible call.
Upvotes: 0
Views: 195
Answers (1)
Tsyvarev
Reputation: 66089
No, it is not possible for 1-initialized semaphore to be acquired simultaneously by different processes.
Semaphores, like other synchronisation mechanisms, are intended to use by different processes/threads. Why do you think that accesses from different processors can break them?
Upvotes: 1
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