Messages in this thread | | | Date | Fri, 23 Oct 2020 17:48:25 +0100 | From | Ricardo Dias <> | Subject | Re: [PATCH] tcp: fix race condition when creating child sockets from syncookies |
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On Fri, Oct 23, 2020 at 06:36:29PM +0200, Eric Dumazet wrote: > On Fri, Oct 23, 2020 at 6:06 PM Ricardo Dias <rdias@memsql.com> wrote: > > > And what about the loopback interface? Why couldn't the loopback > > interface also use a single RX queue? > > > > Loopback is using a per-cpu queue, with no crossing, for efficiency. > > That means : whenever a packet is sent on lo interface from CPU X, it > is put on CPU X backlog queue. > > If the connect() and sendmsg() are run from different cpus, then the > ACK (from last packet of 3WH) and the data packet might land on > different queues.
In that case, I can change the patch to only iterate the ehash bucket only when the listening socket is using the loopback interface, correct?
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