On Wed, Feb 03, 2010 at 03:17:17PM +0100, Rui Machado wrote:
>
> Great, thanks. I increased the log_mtts_per_seg to 5 and was able to
> register more memory. But one question remaining: what is then the
> maximum memory that one is able to register? 5 is the maximum value to
> this parameter, so what does it mean?
>
The overall size of memory that can be registered, from the HCA's
perspective, depends on the number of MTT segments, the number of
MTTs in each segment and PAGE_SIZE. The number of MTT segments however
is limited by the MTT allocator's ability to allocate memory for
managing allocations. Roughly, this is 128K * 8 MTT segments.
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