5.15-stable review patch. If anyone has any objections, please let me know.
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From: Jakub Kicinski kuba@kernel.org
[ Upstream commit f3b52167a0cb23b27414452fbc1278da2ee884fc ]
Driver authors often forget to add GFP_NOWARN for page allocation from the datapath. This is annoying to users as OOMs are a fact of life, and we pretty much expect network Rx to hit page allocation failures during OOM. Make page pool add GFP_NOWARN for ATOMIC allocations by default.
Reviewed-by: Mina Almasry almasrymina@google.com Link: https://patch.msgid.link/20250912161703.361272-1-kuba@kernel.org Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- net/core/page_pool.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/net/core/page_pool.c b/net/core/page_pool.c index 416be038e1cae..813d15a5593c6 100644 --- a/net/core/page_pool.c +++ b/net/core/page_pool.c @@ -283,6 +283,12 @@ static struct page *__page_pool_alloc_pages_slow(struct page_pool *pool, struct page *page; int i, nr_pages;
+ /* Unconditionally set NOWARN if allocating from NAPI. + * Drivers forget to set it, and OOM reports on packet Rx are useless. + */ + if ((gfp & GFP_ATOMIC) == GFP_ATOMIC) + gfp |= __GFP_NOWARN; + /* Don't support bulk alloc for high-order pages */ if (unlikely(pp_order)) return __page_pool_alloc_page_order(pool, gfp);