Description of problem:

Can the following upstream patch be applied.

commit 6624b240e034e8f8a85acd09d19519150df2c0a3
Author: Sam Tannous stannous@cumulusnetworks.com
Date: Wed Nov 13 11:20:46 2019 -0800

This patch introduces a new config option "ifmib_max_num_ifaces NUM"
This patch sets the maximum number of interfaces included in IF-MIB
data collection. For servers with a large number of interfaces
(ppp, dummy, bridge, etc) the IF-MIB processing will take a large
chunk of CPU for ioctl calls (on Linux). Setting a reasonable
maximum number of ifaces for the CPU used will reduce the CPU
load for IF-MIB processing. For example, configuring
"ifmib_max_num_ifaces 500" will include only the first 500
interfaces based on ifindex and ignore all others for IF-MIB
processing.

Signed-off-by: Sam Tannous stannous@cumulusnetworks.com
[ bvanassche: combined two patches into one and removed one unused variable ]

We have a customer that has alot of interfaces and is getting around 20% load because of this issue.