diff options
Diffstat (limited to 'net')
| -rw-r--r-- | net/core/page_pool.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/net/core/page_pool.c b/net/core/page_pool.c index 9b704ea3f4b2..6c7f78bd6421 100644 --- a/net/core/page_pool.c +++ b/net/core/page_pool.c @@ -281,6 +281,17 @@ static bool __page_pool_recycle_direct(struct page *page, return true; } +/* page is NOT reusable when: + * 1) allocated when system is under some pressure. (page_is_pfmemalloc) + * 2) belongs to a different NUMA node than pool->p.nid. + * + * To update pool->p.nid users must call page_pool_update_nid. + */ +static bool pool_page_reusable(struct page_pool *pool, struct page *page) +{ + return !page_is_pfmemalloc(page) && page_to_nid(page) == pool->p.nid; +} + void __page_pool_put_page(struct page_pool *pool, struct page *page, bool allow_direct) { @@ -290,7 +301,8 @@ void __page_pool_put_page(struct page_pool *pool, * * refcnt == 1 means page_pool owns page, and can recycle it. */ - if (likely(page_ref_count(page) == 1)) { + if (likely(page_ref_count(page) == 1 && + pool_page_reusable(pool, page))) { /* Read barrier done in page_ref_count / READ_ONCE */ if (allow_direct && in_serving_softirq()) |