:P_WEXIT is set, so the process won't get swapped out. The problem is that
:the vmspace refcnt is 0 when swapout_procs is called, since it was
:decremented in exit1. The refcnt is incremented before p_flag is tested
:for P_WEXIT, the swapout is skipped because its found to be set, and then
:vmspace_free is called which decrements the refcnt to 0 and prematurely
:frees the vmspace. Decrementing the refcnt in exit1 breaks the normal
:refernce count semantics because the vmspace is not being freed then.
:
:Jake
Yup, I see it. We could just move the P_WEXIT test but I wonder how
many other places the vmspace might be bumped and then released. The
real bug appears to be in exit1().
I seem to recall we hit this situation a few months ago. I thought
it had been fixed.
-Matt
Matthew Dillon
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