[openib-general] Re: Mellanox HCAs: outstanding RDMAs

Michael S. Tsirkin mst at mellanox.co.il
Tue Jun 6 00:43:14 PDT 2006


Quoting r. Talpey, Thomas <Thomas.Talpey at netapp.com>:
> Semantically, the provider is not required to provide any such flow control
> behavior by the way. The Mellanox one apparently does, but it is not
> a requirement of the verbs, it's a requirement on the upper layer. If more
> RDMA Reads are posted than the remote peer supports, the connection
> may break.

This does not sound right. Isn't this the meaning of this field:
"Initiator Depth: Number of RDMA Reads & atomic operations
outstanding at any time"? Shouldn't any provider enforce this limit?

-- 
MST




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