Re: [PATCH 1/1] net: Add SO_REUSEPORT_LISTEN_OFF socket option as drain mode

On Thu, Mar 24, 2016 at 11:20:49AM -0700, Tolga Ceylan wrote:

I would appreciate a conceptual description on how this would work
especially for a common scenario
as described by Willy. My initial impression was that a coordinator
(master) process takes this
responsibility to adjust BPF filters as children come and go.

Indeed that would help, I don't know where to start from for now.

Two popular software has similar use cases: nginx and haproxy. Another
concern is with the
introduction of BPF itself, should we expect a performance drop in
these applications?

Knowing how picky Eric is about performance in such areas, I'm not
worried a single second about adopting something he recommends :-)
I just need to ensure it covers our users' needs. And maybe the
solution I mentionned in the other e-mail could work.

Willy