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Enable superpages on arm64 by default. These seem to be stable, having

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survived multiple world and kernel builds, and of poudriere building full
package sets.

I have observed a 3% reduction in buildworld times with superpages enabled,
however further testing is needed to see if this is observed in other
workloads.

Obtained from:	ABT Systems Ltd
MFC after:	1 month
Sponsored by:	The FreeBSD Foundation
This commit is contained in:
Andrew Turner 2016-09-04 17:50:23 +00:00
parent 6c01c0e0c6
commit 705cb30cae
1 changed files with 1 additions and 1 deletions
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2
sys/arm64/arm64/pmap.c
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@ -242,7 +242,7 @@ extern pt_entry_t pagetable_dmap[];
static SYSCTL_NODE(_vm, OID_AUTO, pmap, CTLFLAG_RD, 0, "VM/pmap parameters");
static int superpages_enabled = 0;
static int superpages_enabled = 1;
SYSCTL_INT(_vm_pmap, OID_AUTO, superpages_enabled,
CTLFLAG_RDTUN | CTLFLAG_NOFETCH, &superpages_enabled, 0,
"Are large page mappings enabled?");