tree 8cb6669eeaa05c9233f1932fe2c40f9ec7c3f857
parent e72670ad7ba6f6d8058359c990375e36e71a1cc4
author Michael Brown <mcb30@ipxe.org> 1674512436 +0000
committer Michael Brown <mcb30@ipxe.org> 1674512589 +0000

[pxe] Discard queued PXE UDP packets when under memory pressure

The PXE UDP receive queue may grow without limit if the PXE NBP does
not call PXENV_UDP_READ sufficiently frequently.

Fix by implementing a cache discarder for received PXE UDP packets
(similar to the TCP cache discarder).

Reported-by: Tal Shorer <shorer@amazon.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>