static int __dune_vm_clone_helper(const void *arg, ptent_t *pte, void *va)
{
int ret;
struct page *pg = dune_pa2page(PTE_ADDR(*pte));
ptent_t *newRoot = (ptent_t *)arg;
ptent_t *newPte;
ret = dune_vm_lookup(newRoot, va, CREATE_NORMAL, &newPte);
if (ret < 0)
return ret;
if (dune_page_isfrompool(PTE_ADDR(*pte)))
dune_page_get(pg);
*newPte = *pte;
return 0;
}
struct page * dune_page_alloc(void)
{
struct page *pg;
pthread_mutex_lock(&page_mutex);
if (SLIST_EMPTY(&pages_free)) {
if (grow_size()) {
pthread_mutex_unlock(&page_mutex);
return NULL;
}
}
pg = SLIST_FIRST(&pages_free);
SLIST_REMOVE_HEAD(&pages_free, link);
pthread_mutex_unlock(&page_mutex);
dune_page_get(pg);
return pg;
}