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Assert that the pages found on the object queue by vm_page_next() and

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vm_page_prev() have correct ownership.

In collaboration with:	alc
Sponsored by:	The FreeBSD Foundation (kib)
MFC after:	1 week
This commit is contained in:
Konstantin Belousov 2016-12-30 17:37:06 +00:00
parent 3abdc65497
commit 0c8bd6a7d8
1 changed files with 10 additions and 6 deletions
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16
sys/vm/vm_page.c
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@ -1328,9 +1328,11 @@ vm_page_next(vm_page_t m)
vm_page_t next;
VM_OBJECT_ASSERT_LOCKED(m->object);
if ((next = TAILQ_NEXT(m, listq)) != NULL &&
next->pindex != m->pindex + 1)
next = NULL;
if ((next = TAILQ_NEXT(m, listq)) != NULL) {
MPASS(next->object == m->object);
if (next->pindex != m->pindex + 1)
next = NULL;
}
return (next);
}
@ -1346,9 +1348,11 @@ vm_page_prev(vm_page_t m)
vm_page_t prev;
VM_OBJECT_ASSERT_LOCKED(m->object);
if ((prev = TAILQ_PREV(m, pglist, listq)) != NULL &&
prev->pindex != m->pindex - 1)
prev = NULL;
if ((prev = TAILQ_PREV(m, pglist, listq)) != NULL) {
MPASS(prev->object == m->object);
if (prev->pindex != m->pindex - 1)
prev = NULL;
}
return (prev);
}