From: Alessandro Decina <alessandro.d@gmail.com>
To: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Cc: "Loktionov, Aleksandr" <aleksandr.loktionov@intel.com>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"David S. Miller" <davem@davemloft.net>,
Alexei Starovoitov <ast@kernel.org>,
Andrew Lunn <andrew+netdev@lunn.ch>,
Daniel Borkmann <daniel@iogearbox.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>,
Jesper Dangaard Brouer <hawk@kernel.org>,
John Fastabend <john.fastabend@gmail.com>,
Paolo Abeni <pabeni@redhat.com>,
"Kitszel, Przemyslaw" <przemyslaw.kitszel@intel.com>,
Stanislav Fomichev <sdf@fomichev.me>,
"Sarkar, Tirthendu" <tirthendu.sarkar@intel.com>,
"Nguyen, Anthony L" <anthony.l.nguyen@intel.com>,
"bpf@vger.kernel.org" <bpf@vger.kernel.org>,
"intel-wired-lan@lists.osuosl.org"
<intel-wired-lan@lists.osuosl.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [Intel-wired-lan] [PATCH net v4 1/1] i40e: xsk: advance next_to_clean on status descriptors
Date: Wed, 19 Nov 2025 11:49:44 +1100 [thread overview]
Message-ID: <aR0UKHeilBX5oTg9@lima-default> (raw)
In-Reply-To: <aRy+xA5xSErIb61j@boxer>
On Tue, Nov 18, 2025 at 07:45:24PM +0100, Maciej Fijalkowski wrote:
> Repro steps would be nice to have, rest would be rather redundant to me.
Yeah unfortunately I don't really know how to _manually_ reproduce.
I don't know why I'm getting these status descriptors, but I'm getting
them reproducibly every few minutes on ubuntu 24.04 across 3 machines
where I've hit this bug/tested the fix. The machines are doing ~300Mbps
of UDP traffic, some of which is done using AF_XDP. The AF_XDP code is
TX only, so it's executing the build-skb-in-zc-path all the time as all
the ingress traffic goes to sockets.
If you have any idea on how to reliably produce the descriptors I'm
happy to give it a try.
next prev parent reply other threads:[~2025-11-19 0:49 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-18 11:31 [PATCH net v4 0/1] i40e: xsk: advance next_to_clean on status descriptors Alessandro Decina
2025-11-18 11:31 ` [Intel-wired-lan] " Alessandro Decina
2025-11-18 11:31 ` [PATCH net v4 1/1] " Alessandro Decina
2025-11-18 11:31 ` [Intel-wired-lan] " Alessandro Decina
2025-11-18 12:13 ` Loktionov, Aleksandr
2025-11-18 12:13 ` Loktionov, Aleksandr
2025-11-18 18:45 ` Maciej Fijalkowski
2025-11-19 0:49 ` Alessandro Decina [this message]
2025-11-19 16:11 ` Maciej Fijalkowski
2025-11-20 15:41 ` Loktionov, Aleksandr
2025-11-20 15:41 ` Loktionov, Aleksandr
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