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(parent: f8e5c7d) | patch
netvsc: fix NAPI performance regression
authorstephen hemminger <stephen@networkplumber.org>
Wed, 22 Mar 2017 21:50:57 +0000 (14:50 -0700)
committerDavid S. Miller <davem@davemloft.net>
Thu, 23 Mar 2017 02:38:55 +0000 (19:38 -0700)
commit556333ea4fbc117a1ec775b462c7c1d6fdb15944
treed23392e3bca366f33c25b3dca2b1f24b7458a630tree | snapshot
parentf8e5c7da71e62e2e98021b6db9768fd09f04b39bcommit | diff
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>
drivers/net/hyperv/hyperv_net.h diff | blob | history
drivers/net/hyperv/netvsc.c diff | blob | history
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