https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=235846
Mark Johnston <ma...@freebsd.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|b...@freebsd.org |ma...@freebsd.org
--- Comment #3 from Mark Johnston <ma...@freebsd.org> ---
Could you please try to reproduce the panic with the assertion below? We don't
dump page table pages in minidumps, which makes this one a little harder to
track down.
diff --git a/sys/amd64/amd64/pmap.c b/sys/amd64/amd64/pmap.c
index 94ad7d1d856a..261500adac65 100644
--- a/sys/amd64/amd64/pmap.c
+++ b/sys/amd64/amd64/pmap.c
@@ -4103,6 +4103,8 @@ pmap_demote_pde_locked(pmap_t pmap, pd_entry_t *pde,
vm_offset_t va,
KASSERT((oldpde & PG_W) == 0,
("pmap_demote_pde: page table page for a wired mapping"
" is missing"));
+ KASSERT(mpte != NULL || pmap != kernel_pmap,
+ ("pmap_demote_pde: missing PT page for va %#lx", va));
/*
* Invalidate the 2MB page mapping and return "failure" if the
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