[openib-general] posting send requests in RTR
Michael S. Tsirkin
mst at mellanox.co.il
Sat Jul 29 14:55:09 PDT 2006
Quoting r. Rimmer, Todd <trimmer at silverstorm.com>:
> The target receives the SCSI commands (such as Test Unit Ready or
> Inquiry) and wants to act on them immediately. However if the command
> has passed the RTU or the RTU is lost, the target is still in RTR. If
> the command was very simple, the target may want to answer the query
> immediately by posting a send with the response.
Since the response won't go out until QP is in RTS anyway, why is it important
to post the send immediately? The simplest appproach for you is to avoid
polling the CQ until QP is in RTS.
--
MST
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