From: David Ahern <dsahern@kernel.org>
To: Eric Dumazet <edumazet@google.com>
Cc: Mina Almasry <almasrymina@google.com>,
Jakub Kicinski <kuba@kernel.org>,
Jesper Dangaard Brouer <jbrouer@redhat.com>,
brouer@redhat.com, Alexander Duyck <alexander.duyck@gmail.com>,
Yunsheng Lin <linyunsheng@huawei.com>,
davem@davemloft.net, pabeni@redhat.com, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org,
Lorenzo Bianconi <lorenzo@kernel.org>,
Yisen Zhuang <yisen.zhuang@huawei.com>,
Salil Mehta <salil.mehta@huawei.com>,
Sunil Goutham <sgoutham@marvell.com>,
Geetha sowjanya <gakula@marvell.com>,
Subbaraya Sundeep <sbhatta@marvell.com>,
hariprasad <hkelam@marvell.com>,
Saeed Mahameed <saeedm@nvidia.com>,
Leon Romanovsky <leon@kernel.org>, Felix Fietkau <nbd@nbd.name>,
Ryder Lee <ryder.lee@mediatek.com>,
Shayne Chen <shayne.chen@mediatek.com>,
Sean Wang <sean.wang@mediatek.com>, Kalle Valo <kvalo@kernel.org>,
Matthias Brugger <matthias.bgg@gmail.com>,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@collabora.com>,
Jesper Dangaard Brouer <hawk@kernel.org>,
Ilias Apalodimas <ilias.apalodimas@linaro.org>,
linux-rdma@vger.kernel.org, linux-wireless@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-mediatek@lists.infradead.org,
Jonathan Lemon <jonathan.lemon@gmail.com>
Subject: Re: Memory providers multiplexing (Was: [PATCH net-next v4 4/5] page_pool: remove PP_FLAG_PAGE_FRAG flag)
Date: Mon, 3 Jul 2023 11:25:50 -0600 [thread overview]
Message-ID: <31db0e5d-4b6d-9b2e-90cc-87a15d500b2e@kernel.org> (raw)
In-Reply-To: <CANn89iJLAnnvFfkmJbQ=ZFMwaqiYDOTD3-P+NpkEMzP9aKV-ig@mail.gmail.com>
On 7/3/23 11:15 AM, Eric Dumazet wrote:
> On Mon, Jul 3, 2023 at 4:45 PM David Ahern <dsahern@kernel.org> wrote:
>
>> That is my expectation. The tcpdump is just an easy example of accessing
>> the skb page frags. skb_copy_and_csum_bits used by icmp is another
>> example that can walk frags wanting access to device memory. You did not
>> cause a panic or trip a WARN_ON for example with the tcpdump?
>>
>
> ICMP packets do not land on the queues having devmem buffers, for
> obvious reasons.
I was not referring to ICMP packets coming in to the nic, but rather an
icmp getting triggered during stack processing.
>
> Only chosen TCP flows are steered to these queues.
of course.
next prev parent reply other threads:[~2023-07-03 17:26 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20230612130256.4572-1-linyunsheng@huawei.com>
[not found] ` <20230612130256.4572-5-linyunsheng@huawei.com>
[not found] ` <20230614101954.30112d6e@kernel.org>
[not found] ` <8c544cd9-00a3-2f17-bd04-13ca99136750@huawei.com>
[not found] ` <20230615095100.35c5eb10@kernel.org>
[not found] ` <CAKgT0Uc6Xoyh3Edgt+83b+HTM5j4JDr3fuxcyL9qDk+Wwt9APg@mail.gmail.com>
[not found] ` <908b8b17-f942-f909-61e6-276df52a5ad5@huawei.com>
[not found] ` <CAKgT0UeZfbxDYaeUntrQpxHmwCh6zy0dEpjxghiCNxPxv=kdoQ@mail.gmail.com>
[not found] ` <72ccf224-7b45-76c5-5ca9-83e25112c9c6@redhat.com>
[not found] ` <20230616122140.6e889357@kernel.org>
[not found] ` <eadebd58-d79a-30b6-87aa-1c77acb2ec17@redhat.com>
[not found] ` <20230619110705.106ec599@kernel.org>
2023-06-30 2:27 ` Memory providers multiplexing (Was: [PATCH net-next v4 4/5] page_pool: remove PP_FLAG_PAGE_FRAG flag) Mina Almasry
2023-07-03 4:20 ` David Ahern
2023-07-03 6:22 ` Mina Almasry
2023-07-03 14:45 ` David Ahern
2023-07-03 17:13 ` Eric Dumazet
2023-07-03 17:23 ` David Ahern
2023-07-06 1:19 ` Mina Almasry
2023-07-03 17:15 ` Eric Dumazet
2023-07-03 17:25 ` David Ahern [this message]
2023-07-03 21:43 ` Jason Gunthorpe
2023-07-06 1:17 ` Mina Almasry
2023-07-10 17:44 ` Jason Gunthorpe
2023-07-10 23:02 ` Mina Almasry
2023-07-10 23:49 ` Jason Gunthorpe
2023-07-11 0:45 ` Mina Almasry
2023-07-11 13:11 ` Jason Gunthorpe
2023-07-11 17:24 ` Mina Almasry
2023-07-11 4:27 ` Christoph Hellwig
2023-07-11 4:59 ` Jakub Kicinski
2023-07-11 5:04 ` Christoph Hellwig
2023-07-11 12:05 ` Jason Gunthorpe
2023-07-11 16:00 ` Jakub Kicinski
2023-07-11 16:20 ` David Ahern
2023-07-11 16:32 ` Jakub Kicinski
2023-07-11 17:06 ` Mina Almasry
2023-07-11 20:39 ` Jakub Kicinski
2023-07-11 21:39 ` David Ahern
2023-07-12 3:42 ` Mina Almasry
2023-07-12 7:55 ` Christian König
2023-07-12 13:03 ` Jason Gunthorpe
2023-07-12 13:35 ` Christian König
2023-07-12 22:41 ` Mina Almasry
2023-07-12 13:01 ` Jason Gunthorpe
2023-07-12 20:16 ` Mina Almasry
2023-07-12 23:57 ` Jason Gunthorpe
2023-07-13 7:56 ` Christian König
2023-07-14 14:55 ` Mina Almasry
2023-07-14 15:18 ` David Ahern
2023-07-17 2:05 ` Mina Almasry
2023-07-17 3:08 ` David Ahern
2023-07-14 15:55 ` Jason Gunthorpe
2023-07-17 1:53 ` Mina Almasry
2023-07-24 14:56 ` Jesper Dangaard Brouer
2023-07-24 16:28 ` Jason Gunthorpe
2023-07-25 4:04 ` Mina Almasry
2023-07-26 17:36 ` Jesper Dangaard Brouer
2023-07-11 16:42 ` Jason Gunthorpe
2023-07-11 17:06 ` Jakub Kicinski
2023-07-11 18:52 ` Jason Gunthorpe
2023-07-11 20:34 ` Jakub Kicinski
2023-07-11 23:56 ` Jason Gunthorpe
2023-07-11 6:52 ` Dan Williams
2023-07-06 16:50 ` Jakub Kicinski
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