diff options
| -rw-r--r-- | mm/hugetlb.c | 30 |
1 files changed, 17 insertions, 13 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c index a876871..afe3e1f 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -852,6 +852,7 @@ static int gather_surplus_pages(struct hstate *h, int delta) struct page *page, *tmp; int ret, i; int needed, allocated; + bool alloc_ok = true; needed = (h->resv_huge_pages + delta) - h->free_huge_pages; if (needed <= 0) { @@ -867,17 +868,13 @@ retry: spin_unlock(&hugetlb_lock); for (i = 0; i < needed; i++) { page = alloc_buddy_huge_page(h, NUMA_NO_NODE); - if (!page) - /* - * We were not able to allocate enough pages to - * satisfy the entire reservation so we free what - * we've allocated so far. - */ - goto free; - + if (!page) { + alloc_ok = false; + break; + } list_add(&page->lru, &surplus_list); } - allocated += needed; + allocated += i; /* * After retaking hugetlb_lock, we need to recalculate 'needed' @@ -886,9 +883,16 @@ retry: spin_lock(&hugetlb_lock); needed = (h->resv_huge_pages + delta) - (h->free_huge_pages + allocated); - if (needed > 0) - goto retry; - + if (needed > 0) { + if (alloc_ok) + goto retry; + /* + * We were not able to allocate enough pages to + * satisfy the entire reservation so we free what + * we've allocated so far. + */ + goto free; + } /* * The surplus_list now contains _at_least_ the number of extra pages * needed to accommodate the reservation. Add the appropriate number @@ -914,10 +918,10 @@ retry: VM_BUG_ON(page_count(page)); enqueue_huge_page(h, page); } +free: spin_unlock(&hugetlb_lock); /* Free unnecessary surplus pages to the buddy allocator */ -free: if (!list_empty(&surplus_list)) { list_for_each_entry_safe(page, tmp, &surplus_list, lru) { list_del(&page->lru); |