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Simple Deadlock

Simple Deadlock. Thread A: Thread B: lock_acquire (l1); lock_acquire (l2); lock_acquire (l2); lock_acquire (l1); ... ... lock_release (l2); lock_release (l1); lock_release (l1); lock_release (l2 );. Circular Requests. T2. T4. R4. "Owned by". R2. R3. R4. R2. R3. Resource. T3.

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Simple Deadlock

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  1. Simple Deadlock Thread A:Thread B: lock_acquire(l1); lock_acquire(l2); lock_acquire(l2); lock_acquire(l1); ... ... lock_release(l2); lock_release(l1); lock_release(l1); lock_release(l2); CS 140 Lecture Notes: Deadlock

  2. Circular Requests T2 T4 R4 "Owned by" R2 R3 R4 R2 R3 Resource T3 T1 T1 T2 "Waiting for" R1 R1 Thread No Circularity Circularity CS 140 Lecture Notes: Deadlock

  3. CS 140 Lecture Notes: Deadlock

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