https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=217138
--- Comment #37 from Mark Millard <mar...@dsl-only.net> ---
Konstantin Belousov provided a patch that seems to
have fixed the issue. . .
On 2017-Apr-9, at 5:27 AM, Konstantin Belousov <kostik...@gmail.com> wrote:
Hmm, could you try the following patch, I did not even compiled it.
diff --git a/sys/arm64/arm64/pmap.c b/sys/arm64/arm64/pmap.c
index 3d5756ba891..55aa402eb1c 100644
--- a/sys/arm64/arm64/pmap.c
+++ b/sys/arm64/arm64/pmap.c
@@ -2481,6 +2481,11 @@ pmap_protect(pmap_t pmap, vm_offset_t sva, vm_offset_t
eva, vm_prot_t prot)
sva += L3_SIZE) {
l3 = pmap_load(l3p);
if (pmap_l3_valid(l3)) {
+ if ((l3 & ATTR_SW_MANAGED) &&
+ pmap_page_dirty(l3)) {
+ vm_page_dirty(PHYS_TO_VM_PAGE(l3 &
+ ~ATTR_MASK));
+ }
pmap_set(l3p, ATTR_AP(ATTR_AP_RO));
PTE_SYNC(l3p);
/* XXX: Use pmap_invalidate_range */
--
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