On 7/26/2015 12:40 PM, Sagi Grimberg wrote:
Ideally, the post contains a chain of all 4 registrations and the
rdma_read (and an opportunistic good scsi response).
Just to be clear: This example is for IB only, correct? IW would
require rkeys with REMOTE_WRITE and 4 read wrs.
My assumption is that it would depend on max_sge_rd.
yea.
IB only? iWARP by definition isn't capable of doing rdma_read to
more than one scatter? Anyway, we'll need to calculate the number
of RDMA_READs.
The wire protocol limits the destination to a single stg/to/len (aka
rkey/addr/len). Devices/fw/sw could implement some magic to support a
single stg/to/len that maps to a scatter gather list of stags/tos/lens.
And you're ignoring invalidation wrs (or read-with-inv) in the
example...
Yes, didn't want to inflate the example too much...
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