From: "Bouska, Zdenek" <zdenek.bouska@siemens.com>
To: Paul Menzel <pmenzel@molgen.mpg.de>
Cc: Tony Nguyen <anthony.l.nguyen@intel.com>,
Przemek Kitszel <przemyslaw.kitszel@intel.com>,
Andrew Lunn <andrew+netdev@lunn.ch>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Jesper Dangaard Brouer <hawk@kernel.org>,
John Fastabend <john.fastabend@gmail.com>,
Stanislav Fomichev <sdf@fomichev.me>,
Richard Cochran <richardcochran@gmail.com>,
Song Yoong Siang <yoong.siang.song@intel.com>,
Lai Peter Jun Ann <jun.ann.lai@intel.com>,
Vinicius Costa Gomes <vinicius.gomes@intel.com>,
"intel-wired-lan@lists.osuosl.org"
<intel-wired-lan@lists.osuosl.org>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"bpf@vger.kernel.org" <bpf@vger.kernel.org>,
"Bezdeka, Florian" <florian.bezdeka@siemens.com>
Subject: RE: [Intel-wired-lan] [PATCH v2] igc: fix page fault in XDP TX timestamps handling
Date: Wed, 11 Mar 2026 14:51:57 +0000 [thread overview]
Message-ID: <PR3PR10MB4270AE69139227E56F4D4842EB47A@PR3PR10MB4270.EURPRD10.PROD.OUTLOOK.COM> (raw)
In-Reply-To: <5d2c5f84-436f-4681-ad81-9900a8563b61@molgen.mpg.de>
Dear Paul,
On 25/05/2026 11:51 Paul Menzel wrote:
> Am 25.02.26 um 10:58 schrieb Zdenek Bouska via Intel-wired-lan:
> > If an XDP application that requested TX timestamping is shutting down
> > while the link of the interface in use is still up the following kernel
> > splat is reported:
> >
> > [ 883.803618] [ T1554] BUG: unable to handle page fault for address:
> ffffcfb6200fd008
> > ...
> > [ 883.803650] [ T1554] Call Trace:
> > [ 883.803652] [ T1554] <TASK>
> > [ 883.803654] [ T1554] igc_ptp_tx_tstamp_event+0xdf/0x160 [igc]
> > [ 883.803660] [ T1554] igc_tsync_interrupt+0x2d5/0x300 [igc]
> > ...
> >
> > During shutdown of the TX ring the xsk_meta pointers are left behind, so
> > that the IRQ handler is trying to touch them.
> >
> > This issue is now being fixed by cleaning up the stale xsk meta data on
> > TX shutdown. TX timestamps on other queues remain unaffected.
>
> If you have the commands to reproduce this, that'd be great to have.
The software which I used is not public yet. I will let you know when that changes.
Thank you for the review!
Best regards,
Zdenek Bouska
--
Siemens, s.r.o
Foundational Technologies
next prev parent reply other threads:[~2026-03-11 14:52 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-25 9:58 Zdenek Bouska
2026-02-25 10:50 ` [Intel-wired-lan] " Paul Menzel
2026-03-11 14:51 ` Bouska, Zdenek [this message]
2026-02-25 11:10 ` Florian Bezdeka
2026-03-11 10:11 ` [Intel-wired-lan] " Dahan, AvigailX
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