On Fri, Jul 24, 2015 at 01:42:55PM +0200, Paolo Bonzini wrote: > aio_notify can be optimized away, and in fact almost always will. However, > qemu_notify_event is used in places where this is incorrect---most notably, > when handling SIGTERM. When aio_notify is optimized away, it is possible that > QEMU enters a blocking ppoll immediately afterwards and stays there, without > reaching main_loop_should_exit(). > > Fix this by using a bottom half. The bottom half can be optimized too, but > scheduling it is enough for the ppoll not to block. The hang is thus avoided. > > Reported-by: Peter Maydell <[email protected]> > Signed-off-by: Paolo Bonzini <[email protected]> > --- > main-loop.c | 11 ++++++++++- > 1 file changed, 10 insertions(+), 1 deletion(-)
Reviewed-by: Stefan Hajnoczi <[email protected]>
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