On Tue, Nov 10, 2015 at 10:19 PM, Eric Dumazet <eric.duma...@gmail.com> wrote: > On Tue, 2015-11-10 at 21:41 -0800, Tom Herbert wrote: >> Tolga, are you still planning to respin this patch (when tree opens?) > > I was planning to add an union on skc_tx_queue_mapping and > sk_max_ack_backlog, so that adding a check on sk_max_ack_backlog in > listener lookup would not add an additional cache line miss. > > This would remove false sharing because sk_ack_backlog is often dirtied > when a socket is added into accept queue. > That's sounds like good fixes, but my question was more about the problem originally described by Tolga where we are transitioning processing for a listener port from one process to another. I think the conclusion in this thread was to modify the code so that listen(fd, 0) would stop new connections from being assigned to a socket (as opposed to explicit SO_REUSEPORT_LISTEN_OFF option). Does this still seem reasonable?
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