[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] sparse M2P table
>>> Keir Fraser <keir.fraser@xxxxxxxxxxxxx> 16.09.09 12:39 >>> >On 16/09/2009 11:04, "Jan Beulich" <JBeulich@xxxxxxxxxx> wrote: > >> I'm in the process of putting together patches to eliminate undue overhead >> resulting from Xen's current assumption on a non-sparse machine address >> map. After removing large holes (symmetric across all nodes) from the >> machine address map and after also mapping the resulting (much smaller) >> frame table sparsely (to account for smaller holes distinct for one or more >> nodes), I intended to also map the P2M table sparsely. > >The guest P2Ms? Why would you want to do that - so that you can add some >hierarchy (and therefore sparseness) to the pseuo-phys address space too? >Otherwise I don't see why you would ever have a sparse P2M, and therefore >why you would care about efficiently handling large holes in it. Oh, typo (see subject) - I really mean the M2P table here. The P2M table has no reason to be sparse. Jan _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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