Author: andrew
Date: Thu Feb 1 14:26:26 2018
New Revision: 328658
URL: https://svnweb.freebsd.org/changeset/base/328658
Log:
Only promote userspace mappings to superpages. This was dropped in r328510,
however due to the break-before-make requirement on arm64 is is currently
unsafe to promote kernel pages.
Sponsored by: DARPA, AFRL
Modified:
head/sys/arm64/arm64/pmap.c
Modified: head/sys/arm64/arm64/pmap.c
==============================================================================
--- head/sys/arm64/arm64/pmap.c Thu Feb 1 13:17:42 2018 (r328657)
+++ head/sys/arm64/arm64/pmap.c Thu Feb 1 14:26:26 2018 (r328658)
@@ -3076,12 +3076,13 @@ validate:
}
#if VM_NRESERVLEVEL > 0
- if ((mpte == NULL || mpte->wire_count == NL3PG) &&
- pmap_superpages_enabled() &&
- (m->flags & PG_FICTITIOUS) == 0 &&
- vm_reserv_level_iffullpop(m) == 0) {
- pmap_promote_l2(pmap, pde, va, &lock);
- }
+ if (pmap != pmap_kernel() &&
+ (mpte == NULL || mpte->wire_count == NL3PG) &&
+ pmap_superpages_enabled() &&
+ (m->flags & PG_FICTITIOUS) == 0 &&
+ vm_reserv_level_iffullpop(m) == 0) {
+ pmap_promote_l2(pmap, pde, va, &lock);
+ }
#endif
if (lock != NULL)
_______________________________________________
[email protected] mailing list
https://lists.freebsd.org/mailman/listinfo/svn-src-head
To unsubscribe, send any mail to "[email protected]"
