[openib-general] Re: [PATCH] libmthca: fix posting long work request lists

Michael S. Tsirkin mst at mellanox.co.il
Wed Nov 9 10:13:03 PST 2005


Quoting r. Roland Dreier <rolandd at cisco.com>:
> Subject: Re: [PATCH] libmthca: fix posting long work request lists
> 
> Thanks, is something similar needed for SRQ as well?

Yes, I missed that. Again, Tavor only. Can you fix it or prefer
to wait for me to do it?
That could be an independent patch though, hope it doesnt delay
applying other fixes.

> How about for
> posting sends?  The Tavor PRM seems to indicate that a doorbell must
> always be rung every 256 WQEs, but I don't see any handling of this
> for send queues in the Mellanox VAPI source.

No, thats just unclear wording in PRM. The limit stems from the
limited number of bits in RQ doorbell.
I added a note for us to clarify this in the next revision.

-- 
MST



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