[ofa-general] Re: IB/core: Add creation flags to QPs

Jack Morgenstein jackm at dev.mellanox.co.il
Wed Mar 26 07:20:18 PDT 2008


On Wednesday 26 March 2008 14:34, Or Gerlitz wrote:
> This breakage is related to ---forward-- compatibility - that is have an 
> app built against a new version of libibverbs working with --older-- 
> version of libibverbs. I wanted to see that we have backward compatibility.
> 
No, it isn't.  If the customer has an old libibverbs running against a new
kernel (which uses your bitmap suggestion of bits 0..7), all his apps will fail
to run (the qp_type passed by the old libibverbs to the new kernel will be
misinterpreted).

- Jack



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