On 2014-04-17 07:46, Shiru Ren wrote: > Hi, all > > I’m trying to figure out how do_savevm works in QEMU. But there is one > thing has bothered me quite a lot. I found that vm_stop invoke > qemu_cpu_kick_thread to send SIG_IPI to a vcpu thread, and I have > understand that in TCG mode, the cpu_signal() function will be invoked as > the SIG_IPI handler. But I don’t know what happens in KVM mode. Actually I > can’t find the signal handler function. I only find a function named > dummy_signal, and it doesn't do anything.
This signal is handled synchronously in KVM mode, see qemu_kvm_eat_signals in cpus.c. Jan
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