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Like on i386, clear the last three entries in the pml4 page when doing a

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pmap_release(), and put it the free queue marked as already zeroed.
This commit is contained in:
Peter Wemm 2004-05-19 21:55:37 +00:00
parent 838c00236b
commit 8dd1279c31
1 changed files with 7 additions and 2 deletions
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9
sys/amd64/amd64/pmap.c
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@ -1296,11 +1296,16 @@ pmap_release(pmap_t pmap)
LIST_REMOVE(pmap, pm_list);
mtx_unlock_spin(&allpmaps_lock);
vm_page_lock_queues();
m = PHYS_TO_VM_PAGE(pmap->pm_pml4[PML4PML4I]);
pmap->pm_pml4[KPML4I] = 0; /* KVA */
pmap->pm_pml4[DMPML4I] = 0; /* Direct Map */
pmap->pm_pml4[PML4PML4I] = 0; /* Recursive Mapping */
vm_page_lock_queues();
m->wire_count--;
atomic_subtract_int(&cnt.v_wire_count, 1);
vm_page_free(m);
vm_page_free_zero(m);
vm_page_unlock_queues();
}