On Mon, 2017-02-27 at 22:00 +1100, Michael Ellerman wrote: > > The alternative would be allocating TCE tables as big as PAGE_SIZE > > but > > only using parts of it but this would complicate a bit bits of code > > responsible for overall amount of memory used for TCE table. > > > > Or kmem_cache_create() could be used to allocate as big TCE table > > levels > > as we really need but that API does not seem to support NUMA nodes. > > kmem_cache_alloc_node() ?
Is that 55 bits of address space (ie, 3 indirect levels + 64k pages) ? Or only 39 (2 indirect level + 64k pages) ? In the former case, I'm happy to limit the levels to 3 for 64K pages, 55 bits of TCE space is more than enough. 39 isn't however. Cheers, Ben.
