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D32528.diff

diff --git a/sys/amd64/amd64/pmap.c b/sys/amd64/amd64/pmap.c
--- a/sys/amd64/amd64/pmap.c
+++ b/sys/amd64/amd64/pmap.c
@@ -4345,7 +4345,9 @@
int i;
/*
- * allocate the page directory page
+ * Allocate the page directory page. Pass NULL instead of a pointer to
+ * the pmap here to avoid recording this page in the resident count, as
+ * optimizations in pmap_remove() depend on this.
*/
pmltop_pg = pmap_alloc_pt_page(NULL, 0, VM_ALLOC_WIRED | VM_ALLOC_ZERO |
VM_ALLOC_WAITOK);
@@ -4377,6 +4379,10 @@
else
pmap_pinit_pml4(pmltop_pg);
if ((curproc->p_md.md_flags & P_MD_KPTI) != 0) {
+ /*
+ * As with pmltop_pg, pass NULL instead of a pointer to
+ * the pmap to ensure that the PTI page isn't counted.
+ */
pmltop_pgu = pmap_alloc_pt_page(NULL, 0,
VM_ALLOC_WIRED | VM_ALLOC_WAITOK);
pmap->pm_pmltopu = (pml4_entry_t *)PHYS_TO_DMAP(

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