[ofa-general] [PATCH RFC] ib_mthca: avoid recycling FMR R_Keys too soon

[Olaf Kirch]

On Thursday 21 February 2008 16:55, Jack Morgenstein wrote:
> On Thursday 21 February 2008 17:49, Or Gerlitz wrote:
> > Is it possible to never re-initialize the key? if yes, what's the 
> > semantics of the M=max_map_per_fmr device attribute? I was thinking that 
> > after the fmr was mapped M times, something --has-- to be reinitialized, 
> > sorry if this is my misunderstanding, can you clarify that?
> > 
> It does not have to be re-initialized.  However, the cache needs to be flushed
> (SYNC_TPT), so that we do not have the same 32-bit key multiple times in the
> cache.
> 
> The "something" which must be done is to flush the cache.  Once the cache is
> flushed, we again have max_map_per_fmr remap possibilities, and we don't care
> what the initial sequence value is.  However, the index value MUST be the
> same as it was before.

Okay, how can I help to move this forward? Do you want me to submit an
updated patch that includes the Sinai?

Olaf
-- 
Olaf Kirch  |  --- o --- Nous sommes du soleil we love when we play
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