d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Allow superpages on arm64 to be enabled. It is disabled for now to allow

Browse Source 
for more testing across more hardware.

Obtained from:	ABT Systems Ltd
MFC after:	1 month
Sponsored by:	The FreeBSD Foundation
This commit is contained in:
Andrew Turner 2016-08-24 13:00:50 +00:00
parent 262432bbb1
commit aa9872243a
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=304750
1 changed files with 1 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
sys/arm64/arm64/pmap.c
View File

@ -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 = 1;
static int superpages_enabled = 0;
SYSCTL_INT(_vm_pmap, OID_AUTO, superpages_enabled,
CTLFLAG_RDTUN | CTLFLAG_NOFETCH, &superpages_enabled, 0,
"Are large page mappings enabled?");
@ -2939,15 +2939,12 @@ pmap_enter(pmap_t pmap, vm_offset_t va, vm_page_t m, vm_prot_t prot,
if ((pmap != pmap_kernel()) && (pmap == &curproc->p_vmspace->vm_pmap))
cpu_icache_sync_range(va, PAGE_SIZE);
/* XXX: Not yet, not all demotions are handled */
#if 0
if ((mpte == NULL || mpte->wire_count == NL3PG) &&
pmap_superpages_enabled() && (m->flags & PG_FICTITIOUS) == 0 &&
vm_reserv_level_iffullpop(m) == 0) {
KASSERT(lvl == 2, ("Invalid pde level %d", lvl));
pmap_promote_l2(pmap, pde, va, &lock);
}
#endif
if (lock != NULL)
rw_wunlock(lock);