tree d23392e3bca366f33c25b3dca2b1f24b7458a630
parent 6069f3fbde03211f4b839e188eba2439f8b8326a
author stephen hemminger <stephen@networkplumber.org> 1490219457 -0700
committer David S. Miller <davem@davemloft.net> 1490236735 -0700

netvsc: fix NAPI performance regression

When using NAPI, the single stream performance declined signifcantly
because the poll routine was updating host after every burst
of packets. This excess signalling caused host throttling.

This fix restores the old behavior. Host is only signalled
after the ring has been emptied.

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>