Re: [PATCH v3] KVM: selftests: Fix the dirty_log_test semaphore imbalance

Shaoqin, Sean,

Apologies for a late comment. I'm trying to remember what I wrote..

On Fri, Feb 02, 2024 at 01:43:32AM -0500, Shaoqin Huang wrote:

Why sem_vcpu_cont and sem_vcpu_stop can be non-zero value? It's because the dirty_ring_before_vcpu_join() execute the sem_post(&sem_vcpu_cont) at the end of each dirty-ring test. It can cause two cases:

As a possible alternative, would it work if we simply reset all the sems for each run? Then we don't care about the leftovers. E.g. sem_destroy() at the end of run_test(), then always init to 0 at entry.