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amd64 pmap: fixup invlgen lookup for fictitious mappings

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Similarly to r353438, use dummy entry.

Reported and tested by:	Neel Chauhan
Sponsored by:	The FreeBSD Foundation
This commit is contained in:
Mateusz Guzik 2019-10-22 22:54:41 +00:00
parent 2e310f6f72
commit 15e33b5493
1 changed files with 9 additions and 1 deletions
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10
sys/amd64/amd64/pmap.c
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@ -951,8 +951,16 @@ SYSCTL_LONG(_vm_pmap, OID_AUTO, invl_wait_slow, CTLFLAG_RD, &invl_wait_slow, 0,
static u_long *
pmap_delayed_invl_genp(vm_page_t m)
{
vm_paddr_t pa;
u_long *gen;
return (&pa_to_pmdp(VM_PAGE_TO_PHYS(m))->pv_invl_gen);
pa = VM_PAGE_TO_PHYS(m);
if (__predict_false((pa) > pmap_last_pa))
gen = &pv_dummy_large.pv_invl_gen;
else
gen = &(pa_to_pmdp(pa)->pv_invl_gen);
return (gen);
}
#else
static u_long *