Dear Ethernet PMD developers, According to rte_mbuf_core.h, RTE_MBUF_DEFAULT_DATAROOM is 2048 bytes because some NICs need at least 2 KB buffer to receive standard Ethernet frames without splitting them into multiple segments.
This is a serious waste of memory, considering that standard Ethernet frames are max 1518 bytes. How wide spread is this limitation... is it common or a rare exception? Where is it documented which NICs suffer from this limitation? Do any Intel NICs suffer from this limitation? NB: We are targeting an MBUF total size (incl. memzone element overhead) of 2^N, and this limitation would increase our MBUF total size to 4 KB. Med venlig hilsen / kind regards - Morten Brørup
