On Tue, Feb 05, 2013 at 06:29:09PM +0100, Luigi Rizzo wrote: > In the current implementation of qemu, running without a network > backend will cause the queue to grow unbounded when the guest is > transmitting traffic. > > This patch fixes the problem by implementing bounded size NetQueue, > used with an arbitrary limit of 10000 packets, and dropping packets > when the queue is full _and_ the sender does not pass a callback. > > The second condition makes sure that we never drop packets that > contains a callback (which would be tricky, because the producer > expects the callback to be run when all previous packets have been > consumed; so we cannot run it when the packet is dropped). > > If documentation is correct, producers that submit a callback should > stop sending when their packet is queued, so there is no real risk > that the queue exceeds the max size by large values. > > Signed-off-by: Luigi Rizzo <ri...@iet.unipi.it>
Thanks, applied to the net-next tree: https://github.com/stefanha/qemu/commits/net-next This patch will be part of the first net pull request for QEMU 1.5. Stefan
