On 2021-12-04 03:04, Sriram R wrote:
Support Fast xmit for mesh device types by caching the
header corresponding to the ethernet DA and reusing
the cached header (mac, mesh, llc) everytime the packet
is intended for that DA.
This will avoid multiple path table lookups during header
generation for a mesh packet tx.
Freshness of the header is verified by identifying change
in mesh paths before using the header and corresponding
changes to the header and cache entry is done on the fly.
Mutable fields of the header such as eth SA, tid, mesh SN,
PN are updated for each xmit.
Each cache entry is about 100Bytes, least used/expired entries
are periodically removed when cache gets almost full.
Currently the size is set to 50 entries.
Driver needs to advertise NL80211_EXT_FEATURE_MESH_FAST_XMIT
to enable this support and setup this cache.
Thanks for working on this! I will likely take a closer look at it soon.
One quick question: does this impose any extra requirements on the
driver, or why does the driver need to advertise support for this?
- Felix
