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Date: Tue, 18 Jun 2024 18:52:10 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: FUJITA Tomonori <fujita.tomonori@...il.com>
Cc: netdev@...r.kernel.org, andrew@...n.ch, horms@...nel.org,
jiri@...nulli.us, pabeni@...hat.com, linux@...linux.org.uk,
hfdevel@....net, naveenm@...vell.com, jdamato@...tly.com
Subject: Re: [PATCH net-next v11 5/7] net: tn40xx: add basic Rx handling
On Tue, 18 Jun 2024 14:16:06 +0900 FUJITA Tomonori wrote:
> + skb = napi_build_skb(page_address(dm->page), PAGE_SIZE);
> + if (!skb) {
> + netdev_err(priv->ndev, "napi_build_skb() failed\n");
memory pressure happens a lot in real world scenarios,
allocations will fail, and you don't want to spam the logs
in such cases.
In general prints on the datapath can easily turn into a DoS vector.
You're better off using appropriate statistics (here struct
netdev_queue_stats_rx :: alloc_fail)
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