Am 22.10.2012 13:09, schrieb n...@bytemark.co.uk: > > The previous behaviour when an NBD connection broke was to fail just the > broken I/O request > and (sometimes) never unlock send_mutex. Now we explicitly call > nbd_teardown_connection and > fail all NBD requests in the "inflight" state - this allows werror/rerror > settings to be > applied to those requests all at once. > > When a new request (or a request that was pending, but not yet inflight) is > issued against > the NBD driver, if we're not connected to the NBD server, we attempt to > connect (and fail > the new request immediately if that doesn't work).
Doesn't this block the vcpu while qemu is trying to establish a new connection? When the network is down, I think this can take quite a while. I would actually expect that this is one of the cases where qemu as a whole would seem to hang. Kevin
