[rds-devel] [ofa-general] [PATCH RFC] rds: add iwarp support
ogerlitz at voltaire.com
Tue Jul 8 03:11:40 PDT 2008
Olaf Kirch wrote:
> Okay, there's a third way to fix this, which may even work with today's Oracle IPC code. The hack is to not submit the fastreg WR until we post a SEND that transmits the rkey to a peer. Then
> - we have a QP to post the WRs to
> - we post the fastreg and the SEND to the same QP,
> ensuring that the peer doesn't initiate the RDMA
> before we've set up the memory registration.
Yes, as Steve noted, using the same QP for the fastreg and send that
carries the rkey/stag is a must since the send should be fenced on the
fastreg completion to make sure the remote side uses a valid key.
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