From: "Toke Høiland-Jørgensen" <toke@redhat.com>
To: Alexander Lobakin <aleksander.lobakin@intel.com>,
Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
John Fastabend <john.fastabend@gmail.com>,
Andrii Nakryiko <andrii@kernel.org>
Cc: Alexander Lobakin <aleksander.lobakin@intel.com>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Maciej Fijalkowski <maciej.fijalkowski@intel.com>,
Stanislav Fomichev <sdf@fomichev.me>,
Magnus Karlsson <magnus.karlsson@intel.com>,
nex.sw.ncis.osdt.itp.upstreaming@intel.com, bpf@vger.kernel.org,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH net-next v6 08/10] page_pool: make page_pool_put_page_bulk() handle array of netmems
Date: Wed, 04 Dec 2024 11:50:11 +0100 [thread overview]
Message-ID: <87r06nafj0.fsf@toke.dk> (raw)
In-Reply-To: <20241203173733.3181246-9-aleksander.lobakin@intel.com>
Alexander Lobakin <aleksander.lobakin@intel.com> writes:
> Currently, page_pool_put_page_bulk() indeed takes an array of pointers
> to the data, not pages, despite the name. As one side effect, when
> you're freeing frags from &skb_shared_info, xdp_return_frame_bulk()
> converts page pointers to virtual addresses and then
> page_pool_put_page_bulk() converts them back. Moreover, data pointers
> assume every frag is placed in the host memory, making this function
> non-universal.
> Make page_pool_put_page_bulk() handle array of netmems. Pass frag
> netmems directly and use virt_to_netmem() when freeing xdpf->data,
> so that the PP core will then get the compound netmem and take care
> of the rest.
>
> Signed-off-by: Alexander Lobakin <aleksander.lobakin@intel.com>
Reviewed-by: Toke Høiland-Jørgensen <toke@redhat.com>
next prev parent reply other threads:[~2024-12-04 10:50 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-12-03 17:37 [PATCH net-next v6 00/10] xdp: a fistful of generic changes pt. I Alexander Lobakin
2024-12-03 17:37 ` [PATCH net-next v6 01/10] xsk: align &xdp_buff_xsk harder Alexander Lobakin
2024-12-04 10:27 ` Toke Høiland-Jørgensen
2024-12-03 17:37 ` [PATCH net-next v6 02/10] bpf, xdp: constify some bpf_prog * function arguments Alexander Lobakin
2024-12-03 17:37 ` [PATCH net-next v6 03/10] xdp, xsk: constify read-only arguments of some static inline helpers Alexander Lobakin
2024-12-03 17:37 ` [PATCH net-next v6 04/10] xdp: allow attaching already registered memory model to xdp_rxq_info Alexander Lobakin
2024-12-03 17:37 ` [PATCH net-next v6 05/10] xsk: allow attaching XSk pool via xdp_rxq_info_reg_mem_model() Alexander Lobakin
2024-12-03 17:37 ` [PATCH net-next v6 06/10] xdp: register system page pool as an XDP memory model Alexander Lobakin
2024-12-03 17:37 ` [PATCH net-next v6 07/10] netmem: add a couple of page helper wrappers Alexander Lobakin
2024-12-04 10:49 ` Toke Høiland-Jørgensen
2024-12-06 4:03 ` Mina Almasry
2024-12-03 17:37 ` [PATCH net-next v6 08/10] page_pool: make page_pool_put_page_bulk() handle array of netmems Alexander Lobakin
2024-12-04 10:50 ` Toke Høiland-Jørgensen [this message]
2024-12-06 4:07 ` Mina Almasry
2024-12-03 17:37 ` [PATCH net-next v6 09/10] page_pool: allow mixing PPs within one bulk Alexander Lobakin
2024-12-06 2:40 ` Jakub Kicinski
2024-12-06 13:49 ` Alexander Lobakin
2024-12-06 16:20 ` Jakub Kicinski
2024-12-03 17:37 ` [PATCH net-next v6 10/10] xdp: get rid of xdp_frame::mem.id Alexander Lobakin
2024-12-06 7:10 ` [PATCH net-next v6 00/10] xdp: a fistful of generic changes pt. I patchwork-bot+netdevbpf
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