Re: MPTCP - multiplexing many TCP connections through one socket to get better bandwidth

On Mon, Aug 17, 2026 at 10:19 AM Jakub Wartak
<jakub(dot)wartak(at)enterprisedb(dot)com> wrote:
>
> On Thu, Aug 13, 2026 at 9:59 PM Greg Sabino Mullane <htamfids(at)gmail(dot)com> wrote:
> >
> > I like the idea a lot. Have not tested yet, but the patch looks okay as a POC. I'm wondering if rather than a run-time check for IPPROTO_MCP in src/backend/libpq/pqcomm.c, we shouldn't check right away as soon as it is enabled via a guc check - see check_bonjour as a good example.
>
> Hi Greg, thanks for taking a look. I've attached v3 that added
> check_listen_mptcp() (GUC check) that enhanced the situation just as You
> have indicated.

Oops, I completely forgot about properly guarding this for non-Linux OS,
e.g. on FreeBSD complained that IPPROTO_MPTCP is unknown. Attached v4
fixes that.

-J.