tree db7883359e3748a0789ca78d85c97dbd480e7911
parent 084c9535aab61ddd0e55eb796baa6b078b3843b1
author Gao Feng <fgao@ikuai8.com> 1470717504 +0800
committer David S. Miller <davem@davemloft.net> 1470874934 -0700

rps: Inspect PPTP encapsulated by GRE to get flow hash

The PPTP is encapsulated by GRE header with that GRE_VERSION bits
must contain one. But current GRE RPS needs the GRE_VERSION must be
zero. So RPS does not work for PPTP traffic.

In my test environment, there are four MIPS cores, and all traffic
are passed through by PPTP. As a result, only one core is 100% busy
while other three cores are very idle. After this patch, the usage
of four cores are balanced well.

Signed-off-by: Gao Feng <fgao@ikuai8.com>
Reviewed-by: Philip Prindeville <philipp@redfish-solutions.com>
Signed-off-by: David S. Miller <davem@davemloft.net>