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Assert that page allocations during an interrupt specify

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VM_ALLOC_INTERRUPT.

Assert that pages removed from the cache queue are not busy.
This commit is contained in:
Alan Cox 2004-12-31 19:50:45 +00:00
parent 90c4b74cbe
commit 0869d38ba6
1 changed files with 6 additions and 2 deletions
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8
sys/vm/vm_page.c
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@ -706,9 +706,10 @@ vm_page_select_cache(int color)
mtx_assert(&vm_page_queue_mtx, MA_OWNED);
while ((m = vm_pageq_find(PQ_CACHE, color, FALSE)) != NULL) {
if ((m->flags & PG_BUSY) == 0 && m->busy == 0 &&
m->hold_count == 0 && (VM_OBJECT_TRYLOCK(m->object) ||
if (m->hold_count == 0 && (VM_OBJECT_TRYLOCK(m->object) ||
VM_OBJECT_LOCKED(m->object))) {
KASSERT((m->flags & PG_BUSY) == 0 && m->busy == 0,
("Found busy cache page %p", m));
KASSERT(m->dirty == 0,
("Found dirty cache page %p", m));
KASSERT(!pmap_page_is_mapped(m),
@ -750,6 +751,9 @@ vm_page_alloc(vm_object_t object, vm_pindex_t pindex, int req)
int color, flags, page_req;
page_req = req & VM_ALLOC_CLASS_MASK;
KASSERT(curthread->td_intr_nesting_level == 0 ||
page_req == VM_ALLOC_INTERRUPT,
("vm_page_alloc(NORMAL|SYSTEM) in interrupt context"));
if ((req & VM_ALLOC_NOOBJ) == 0) {
KASSERT(object != NULL,