0ef2ab3ab8
Bump up the KVA size proportionally from 512GB to 2TB. The number of page table pages used by the direct map is now calculated at run time based on 'Maxmem'. This means the small memory systems will not see any additional tax in terms of page table pages for the direct map. However all amd64 systems, regardless of the memory size, will use 3 more pages to accomodate the bump in the KVA size. More details available here: http://lists.freebsd.org/pipermail/freebsd-hackers/2013-June/043015.html http://lists.freebsd.org/pipermail/freebsd-current/2013-July/043143.html Tested with the following configurations: - Sandybridge server with 64GB of memory. - bhyve VM with 64MB of memory. - bhyve VM with a 8GB of memory with the memory segment above 4GB cuddling right up against the 4TB maximum memory limit. Discussed on: hackers@, current@ Submitted by: Chris Torek (torek@torek.net)
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