On Mon, Dec 07, 2015 at 05:59:41PM -0800, Andy Lutomirski wrote: > If I dump all task states (see attached typescript), I see a bunch of > things blocked in 9p rpc. This makes me think it could be a QEMU bug, > not a kernel bug.
Maybe, maybe not - I'd suggest dumping the 9p traffic and checking the request and response IDs; at least one bug in that area got fixed (see commit a84b69 for gory details). Really, check if something gets screwed with IDs. They should be unique among outstanding requests and never reused until either a response with the matching ID arrives, *or* TFLUSH on that ID is sent and reply has arrived. If those rules get buggered, it's very easy to get hangs like that. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
