Trigger exit from cpu_exec_all on pending IO events
Except for timer events, we currently do not leave the loop over all VCPUs if an IO event was filed. That may cause unexpected IO latencies under !CONFIG_IOTHREAD in SMP scenarios. Fix it by setting the global exit_request which breaks the loop. Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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