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netpoll: do not warn when the best-effort pool refill fails

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refill_skbs() tops up the per-netpoll skb pool with GFP_ATOMIC and
simply stops on the first allocation failure, leaving the pool partially
filled; a later refill tops it up once memory frees up. The allocation
failing is therefore an expected and fully handled condition, but
without __GFP_NOWARN the page allocator emits a warn_alloc() splat with
a full stack trace on every miss.

Pass __GFP_NOWARN so the best-effort refill stays quiet, mirroring the
same change in netconsole's find_skb().

Signed-off-by: Breno Leitao <leitao@debian.org>
Link: https://patch.msgid.link/20260629-netpoll_no_warn-v1-2-f380f0b2cd0c@debian.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Breno Leitao
2026-06-29 04:45:41 -07:00
committed by Jakub Kicinski
parent 09f7a613a1
commit 84c0ff1efb
1 changed files with 1 additions and 1 deletions
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2
net/core/netpoll.c
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@@ -221,7 +221,7 @@ static void refill_skbs(struct netpoll *np)
skb_pool = &np->skb_pool;
while (READ_ONCE(skb_pool->qlen) < MAX_SKBS) {
skb = alloc_skb(MAX_SKB_SIZE, GFP_ATOMIC);
skb = alloc_skb(MAX_SKB_SIZE, GFP_ATOMIC | __GFP_NOWARN);
if (!skb)
break;