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page_pool: always add GFP_NOWARN for ATOMIC allocations

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[ 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>
This commit is contained in:
Jakub Kicinski
2025-09-12 09:17:03 -07:00
committed by Greg Kroah-Hartman
parent fe3f8b6716
commit 7613c06ffa
1 changed files with 6 additions and 0 deletions
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6
net/core/page_pool.c
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@@ -422,6 +422,12 @@ 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);