Il 19/04/2014 07:24, Shiru Ren ha scritto:
Thanks for your answer. It really helped me a lot. However, it cloud be really helpful if you cloud explain how the SIG_IPI signal causes the CPU thread to exit the vcpu thread in KVM mode. Is it like an interrupt, causes a VM exit immediately? Or KVM just ignore it till a VM exit happens.
Yes, sending the signal causes the kernel to send an IPI to the processor running the VCPU thread (a hardware-level one, not the "soft" SIG_IPI concept). The IPI causes a VM exit to happen immediately.
Paolo
