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Re: [Xen-devel] do_iret bug in xen
raise_softirq is not the same as actually doing it. Raise only sets a bit indicating pending softirq. Before returning to the guest, the bin triggers actual execution of the softirq
Andres since "sti" is on, an interrupt can occur which can cause the control to enter "__runq_tickle", which then invokes "cpumask_raise_softirq(mask, SCHEDULE_SOFTIRQ)" to send IPI to a processor causing the control to enter "__enter_scheduler" whichchanges the current.
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