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David Marchand 2efae58940 system-dpdk: Fix socket conflict when starting testpmd.
The DPDK telemetry library tries to connect to existing socket files so
that it knows whether it can take over them.

As was reported by Christian, following a fix in DPDK that got backported
in v23.11.1, vhost-user unit tests that have both OVS and testpmd running
at the same time reveal a conflict over the telemetry socket.
This conflict shows up as an error message in OVS logs which makes those
tests fail in the CI:

2024-06-06T13:03:38.351Z|00001|dpdk|ERR|TELEMETRY: Socket write base info
	to client failed

The EAL file-prefix option affects both the directory where DPDK stores
running files (like the telemetry socket) and how files backing hugepages
are named (when in non --in-memory mode).
Configure (again) this prefix so that testpmd runs in a dedicated directory.

Reported-at: https://mail.openvswitch.org/pipermail/ovs-dev/2024-June/414545.html
Fixes: c488f28a0eaf ("system-dpdk: Don't require hugetlbfs.")
Signed-off-by: David Marchand <david.marchand@redhat.com>
Acked-by: Kevin Traynor <ktraynor@redhat.com>
Acked-by: Eelco Chaudron <echaudro@redhat.com>
2024-06-07 11:43:37 +01:00
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