>> This information is outdated. The current max in RELENG_7 for amd64 is >> ~3.75GB.
Technically, RELENG_7 should allow kmem_size of up to 6G, but the sysctl variables used for tuning are 32-bit and *that* limits kmem_size to ~4G. It's been fixed in -current and can easily be fixed in RELENG_7 (if it's not fixedyet). As far as I can tell, all necessary code to support large kmem_size is already in RELENG_7. It's easy enough to allow even larger kmem_size. See attached diff that I'm using. With that diff you can set vm.kmem_size to ~16G. --Artem
vm-large.diff
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