Anthony Liguori wrote: > No, basically, the problem will boil down to, the IO thread is > select()'d waiting for an event to occur. However, you've done > something in the VCPU thread that requires the IO thread to run it's > main loop. You need to use qemu_notify_event() to force the IO thread > to break out of select(). > > Debugging these problems are very difficult and the complexity here is > the main reason the IO thread still hasn't been enabled by default in > qemu.git.
It is difficult. One approach to debugging them, in general, is to have a special debugging mode where the select() loop wakes up repeatedly at high speed and checks all the conditions it's supposed to to be waiting for that _should_ have triggered a wakeup, and if any of them are asserted for two timed wakeups (or some sufficient duration, checked by gettimeofday), emit a bug message because it probably is one. I don't know if that could be applied in qemu's event loop. -- Jamie -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
