[dpdk-dev] [PATCH v2] doc: announce ABI change for rte_eth_dev structure

Jerin Jacob jerin.jacob at caviumnetworks.com
Thu Jul 28 18:25:40 CEST 2016


On Thu, Jul 28, 2016 at 04:52:45PM +0200, Thomas Monjalon wrote:
> 2016-07-28 19:29, Jerin Jacob:
> > Above things worries me, I wouldn't have cared if the changes are not comes
> > in fastpath and I don't think this sort of issues will never get fixed any time
> > soon in this community.
> > 
> > So I given up.
> 
> I feel something goes wrong here but I cannot understand your sentence.
> Please could you reword/explain Jerin?

I guess you have removed the context from the email. Never mind.

1) IMHO, Introducing a new fast path API which has "performance impact"
on existing other PMD should get the consensus from the other PMD maintainers.
At least, bare minimum, send a patch much in advance with the
implementation of ethdev API as well as PMD
driver implementation to get feedback from other developers _before_ ABI
change announcement rather just debating on hypothetical points.

2) What I can understand from the discussion is that it is the
workaround for an HW limitation.
At this point, I am not sure tx_prep is the only way to address it and
do other PMD have similar
restriction?. If yes, Can we have abstract it in a proper way the usage
part will be very clear from PMD and application perspective?

Jerin


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