> [ Btw, I added code to the big kernel lock that checks that the lock is
> always aquired with interrupts enabled (locally or globally). I've run a
> kernel that would panic if interrupts were ever disabled upon trying to
> access the global kernel lock, and it's been up so far, under both heavy
> load and me trying to find some other way to crash it. [...]
the case i occasionally saw was i think the first lock_kernel() done in
non-boot CPUs. (this was fixed) But i think the original reason was
because lock_kernel() _itself_ used to disable interrupts (just like a
spin_lock_irq()). But now it's lean and mean.
-- mingo
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