RFT: virtio_net: limit xmit polling

From: Michael S. Tsirkin
Date: Sun Jun 19 2011 - 06:27:34 EST

OK, different people seem to test different trees. In the hope to get
everyone on the same page, I created several variants of this patch so
they can be compared. Whoever's interested, please check out the
following, and tell me how these compare:



virtio-net-limit-xmit-polling/base - this is net-next baseline to test against
virtio-net-limit-xmit-polling/v0 - fixes checks on out of capacity
virtio-net-limit-xmit-polling/v1 - previous revision of the patch
this does xmit,free,xmit,2*free,free
virtio-net-limit-xmit-polling/v2 - new revision of the patch
this does free,xmit,2*free,free

There's also this on top:
virtio-net-limit-xmit-polling/v3 -> don't delay avail index update
I don't think it's important to test this one, yet

Userspace to use: event index work is not yet merged upstream
so the revision to use is still this:

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