David Miller wrote:
And IPI handler runs in HW irq context, therefore such an IPI-creates-an-IPI
should not be allowed, at least not directly.
Actually the restriction seems to be that an IPI cannot be sent when
"irqs_disabled()", hmmm...
Does this apply to smp_send_reschedule() as well?
A [rare] codepath in the current rcu code does to trigger quiescent
states on remote cpus.
--
Manfred
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