Hi, This series is based on a previous series submitted by Uri Lublin:
http://lists.gnu.org/archive/html/qemu-devel/2009-03/msg00864.html Details on the patches, except for this question: does it make sense to have a 'low' watermark for block devices? I think it doesn't, then the event (and the monitor accompanying command) should be called BLOCK_HIGH_WATERMARK. But this makes the event very unflexible, so I have called it BLOCK_WATERMARK and added parameters for the high/low watermark type. It's a machine protocol, so I don't think the additional parameter matters much.
