On 30/11/2016 10:46, Peter Maydell wrote: >> > The problem is indeed with the scheduling. The way it currently works >> > is to depend on the iothread to kick a reschedule once in a while, or >> > a cpu to issue an instruction that does so (wfe/wfi). However if >> > there's no io and a cpu never issues a scheduling instruction, then it >> > won't happen. We either need a sched tick or to never have an infinite >> > iothread ppoll timeout (basically using the ppoll timeout as a tick). > Ah yes, that one. I thought Alex had a patch which added > a timer to ensure that we don't allow a single guest > TCG vCPU to hog the execution thread, but maybe I'm > misremembering.
Yes, it's part of MTTCG. Paolo
