I was successfully able to register a total of 10GB of memory in 10M chunks. In other words 1024 MRs of 10MB each.
On Mon, Mar 17, 2008 at 12:22 AM, Or Gerlitz <[EMAIL PROTECTED]> wrote: > Rajouri Jammu wrote: > > Does that mean that no matter how I size my memory regions the maximum > > amount of (total) memory I can register is = 2^20 * 4K = 4GB? > > I.e., Am I limited by the total number of MTTs? > Generally speaking, yes, the IB network MMU (MTT this case) is limited > in the number of slots it has and so in the amount of memory it can map > at once, but I assume this is typical eg for I/O MMUs and makes sense. > > However, each slot can map --more-- then 4K, so one should be able to > use huge-pages etc. I am not sure what is the actual status of > registering huge-pages by the Linux IB stack, maybe Roland can comment > on that. > > Or. > > >
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