From: "Alexei Starovoitov" <alexei.starovoitov@gmail.com>
To: "Jakub Kicinski" <kuba@kernel.org>
Cc: "Mahe Tardy" <mahe.tardy@gmail.com>, <bpf@vger.kernel.org>,
<andrew+netdev@lunn.ch>, <andrii@kernel.org>, <ast@kernel.org>,
<daniel@iogearbox.net>, <davem@davemloft.net>,
<eddyz87@gmail.com>, <edumazet@google.com>,
<john.fastabend@gmail.com>, <martin.lau@linux.dev>,
<pabeni@redhat.com>, <song@kernel.org>, <liamwisehart@meta.com>
Subject: Re: [PATCH v1 1/4] bpf: Add netpoll kfuncs for sending UDP packets
Date: Tue, 12 May 2026 18:16:55 -0700 [thread overview]
Message-ID: <DIH5HQ54TYJF.2LNWVZJ50B5L0@gmail.com> (raw)
In-Reply-To: <20260512163255.34162f1a@kernel.org>
On Tue May 12, 2026 at 4:32 PM PDT, Jakub Kicinski wrote:
>
> I think you may be overly optimistic on the dependability of netpoll.
> Rik has added support for serial scraping at Meta because netconsole
> misses a lot of crucial alerts. And I can confirm there's a bunch of
> errors that appear in that dataset that are missed by netcons.
>
> Then there are little nuggets like some generations of bnxt NICs
> having to discard all Rx frames when netcons is trying to send
> and Tx is full (bnxt_force_rx_discard()).
horrors. since bnxt is doing that then indeed it's not something
to rely on. I thought that over the years major vendors cleaned up
the driver side well. Looks like it's still not the case.
Sigh. Moving to sock_create_kern() and friends then.
next prev parent reply other threads:[~2026-05-13 1:17 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-11 8:53 [PATCH v1 0/4] bpf: Introduce bpf_netpoll Mahe Tardy
2026-05-11 8:53 ` [PATCH v1 1/4] bpf: Add netpoll kfuncs for sending UDP packets Mahe Tardy
2026-05-11 9:40 ` bot+bpf-ci
2026-05-11 9:51 ` Mahe Tardy
2026-05-11 12:05 ` Daniel Borkmann
2026-05-12 8:51 ` Mahe Tardy
2026-05-12 1:20 ` Jakub Kicinski
2026-05-12 1:59 ` Alexei Starovoitov
2026-05-12 2:36 ` Jakub Kicinski
2026-05-12 2:59 ` Alexei Starovoitov
2026-05-12 13:53 ` Jakub Kicinski
2026-05-12 20:25 ` Alexei Starovoitov
2026-05-12 23:32 ` Jakub Kicinski
2026-05-13 1:16 ` Alexei Starovoitov [this message]
2026-05-13 1:31 ` Song Liu
2026-05-11 8:53 ` [PATCH v1 2/4] selftests/bpf: Add netpoll kfunc sanity test Mahe Tardy
2026-05-11 8:53 ` [PATCH v1 3/4] selftests/bpf: Add netpoll kfunc IPv6 variant test Mahe Tardy
2026-05-11 8:53 ` [PATCH v1 4/4] selftests/bpf: Add netpoll setup basic tests Mahe Tardy
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