Author: kib
Date: Sun Feb 19 20:40:07 2017
New Revision: 313966
URL: https://svnweb.freebsd.org/changeset/base/313966
Log:
MFamd64 r313933: microoptimize pmap_protect_pte1().
Noted by: alc
Tested by: mmel
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Modified:
head/sys/arm/arm/pmap-v6.c
Modified: head/sys/arm/arm/pmap-v6.c
==============================================================================
--- head/sys/arm/arm/pmap-v6.c Sun Feb 19 20:35:39 2017 (r313965)
+++ head/sys/arm/arm/pmap-v6.c Sun Feb 19 20:40:07 2017 (r313966)
@@ -4799,12 +4799,11 @@ pmap_protect_pte1(pmap_t pmap, pt1_entry
("%s: sva is not 1mpage aligned", __func__));
opte1 = npte1 = pte1_load(pte1p);
- if (pte1_is_managed(opte1)) {
+ if (pte1_is_managed(opte1) && pte1_is_dirty(opte1)) {
eva = sva + PTE1_SIZE;
for (va = sva, m = PHYS_TO_VM_PAGE(pte1_pa(opte1));
va < eva; va += PAGE_SIZE, m++)
- if (pte1_is_dirty(opte1))
- vm_page_dirty(m);
+ vm_page_dirty(m);
}
if ((prot & VM_PROT_WRITE) == 0)
npte1 |= PTE1_RO | PTE1_NM;
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