Re: [Patch v4 3/3] net: Restrict receive packets queuing to housekeeping CPUs

From: Peter Zijlstra <peterz@infradead.org>
Date: Fri, 26 Jun 2020 13:14:01 +0200

On Thu, Jun 25, 2020 at 06:34:43PM -0400, Nitesh Narayan Lal wrote:

quoted

From: Alex Belits <redacted>

With the existing implementation of store_rps_map(), packets are queued
in the receive path on the backlog queues of other CPUs irrespective of
whether they are isolated or not. This could add a latency overhead to
any RT workload that is running on the same CPU.

Ensure that store_rps_map() only uses available housekeeping CPUs for
storing the rps_map.

Signed-off-by: Alex Belits <redacted>
Signed-off-by: Nitesh Narayan Lal <redacted>

Dave, ACK if I route this?

No problem:

Acked-by: David S. Miller <davem@davemloft.net>