Hi Peter. I finally had some cycles to actually play with KVM again this weekend, and I noticed that QEMU (the older branch that I based my stuff) does not generate timer interrupts, when the io-thread is not enabled. The timer interrupts in hw/arm_timer.c seem to be based simply on posix_timers, so in my simple logic I figured that the timers should still work on a single thread, when timer interrupts occur in the kernel they should generate a signal to the KVM process and KVM should exit due to checking for signal_pending(current) and everything should work. It certainly used to work without the io-thread option, but in the recent kernel on which I rebased the code (Catalin's master branch) no emulated timer interrupts are ever raised (in fact a quick ftrace shows that the timer is cancelled in hrtimer and never activated again). Is this a bug, or should io-thread just be enabled with KVM and I shouldn't worry about the case above? Perhaps some of you can shed some light on this? Thanks! -Christoffer
