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amd64: Expose vm.pmap.large_map_pml4_entries as a sysctl node

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It's nice to have sysctl nodes for tunables.

Sponsored by:	Dell EMC Isilon
This commit is contained in:
Conrad Meyer 2019-09-26 01:50:26 +00:00
parent f057565e0d
commit f7b69dd986
1 changed files with 5 additions and 0 deletions
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5
sys/amd64/amd64/pmap.c
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@ -1965,6 +1965,11 @@ pmap_init(void)
} }
} }
SYSCTL_UINT(_vm_pmap, OID_AUTO, large_map_pml4_entries,
CTLFLAG_RDTUN | CTLFLAG_NOFETCH, &lm_ents, 0,
"Maximum number of PML4 entries for use by large map (tunable). "
"Each entry corresponds to 512GB of address space.");
static SYSCTL_NODE(_vm_pmap, OID_AUTO, pde, CTLFLAG_RD, 0, static SYSCTL_NODE(_vm_pmap, OID_AUTO, pde, CTLFLAG_RD, 0,
"2MB page mapping counters"); "2MB page mapping counters");