[Qemu-devel] [s390] possible deadlock in handle_sigp?

[Paolo Bonzini]

I think that two CPUs doing reciprocal SIGPs could in principle end up
waiting on each other to complete their run_on_cpu.  If the SIGP has to
be synchronous the fix is not trivial (you'd have to put the CPU in a
state similar to cpu->halted = 1), otherwise it's enough to replace
run_on_cpu with async_run_on_cpu.

Thanks,

Paolo