On 10/31/2020 3:07 PM, Thomas Monjalon wrote:
30/10/2020 18:44, Thomas Monjalon:
The mbuf field userdata (aliased as udata64)
was announced to be removed for two reasons:
- applications, libraries and drivers used the same field
for different purposes, with a risk of usage conflict.
- this field always used 8 bytes even if unneeded
Some dynamic fields are created when needed to replace
the big static userdata field.
As a consequence, 8 bytes can be re-allocated to dynamic fields.
This mbuf layout change is important to allow adding more features
(consuming more dynamic fields) during the next year.
Applied
The new txgbe driver in the next-net is also using ‘udata64’, that also needs to
be updated. cc'ed txgbe maintainer.
