Hi,

in the function sa_upcall_userret(struct lwp *l) / kern_sa.c
there is a slight chance getting the KDASSERT(sa->sa_nstacks > 0);
kicking in
as after the "while (sa->sa_nstacks == 0)" loop checking the condtion
tested in the assertion there is a chance of sleeping (sau =
sadata_upcall_alloc(1);)
so under extrem memroy pressure the system might panic (or later crash
without the assertion)
I hope I did not miss anything important in this context.

Greetings,
Lars



--
Mystische Erklärungen.
Die mystischen Erklärungen gelten für tief;
die Wahrheit ist, daß sie noch nicht einmal oberflächlich sind.
                --Friedrich Nietzsche