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linux/net/core
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Dragos Tatulea c12ebeacfb page_pool: Clamp pool size to max 16K pages 
[ Upstream commit a1b501a8c6 ]

page_pool_init() returns E2BIG when the page_pool size goes above 32K
pages. As some drivers are configuring the page_pool size according to
the MTU and ring size, there are cases where this limit is exceeded and
the queue creation fails.

The page_pool size doesn't have to cover a full queue, especially for
larger ring size. So clamp the size instead of returning an error. Do
this in the core to avoid having each driver do the clamping.

The current limit was deemed to high [1] so it was reduced to 16K to avoid
page waste.

[1] https://lore.kernel.org/all/1758532715-820422-3-git-send-email-tariqt@nvidia.com/

Signed-off-by: Dragos Tatulea <dtatulea@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/20250926131605.2276734-2-dtatulea@nvidia.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2025-12-07 06:09:24 +09:00
..
bpf_sk_storage.c bpf: Add length check for SK_DIAG_BPF_STORAGE_REQ_MAP_FD parsing 2023-08-11 15:13:50 +02:00
datagram.c net: fix rc7's __skb_datagram_iter() 2024-07-18 13:07:37 +02:00
datagram.h net/core: Allow the compiler to verify declaration and definition consistency 2019-03-27 13:49:44 -07:00
dev.c net: openvswitch: fix race on port output 2025-05-02 07:44:22 +02:00
dev_addr_lists.c net: dev_addr_list: handle first address in __hw_addr_add_ex 2021-09-30 13:29:09 +01:00
dev_ioctl.c net: dev: Convert sa_data to flexible array in struct sockaddr 2024-03-01 13:21:59 +01:00
devlink.c devlink: report devlink_port_type_warn source device 2024-03-01 13:21:55 +01:00
drop_monitor.c drop_monitor: fix incorrect initialization order 2025-03-13 12:50:53 +01:00
dst.c net: do not delay dst_entries_add() in dst_release() 2024-11-14 13:13:40 +01:00
dst_cache.c wireguard: device: reset peer src endpoint when netns exits 2021-12-08 09:04:46 +01:00
failover.c failover: allow name change on IFF_UP slave interfaces 2019-04-10 22:12:26 -07:00
fib_notifier.c net: fib_notifier: propagate extack down to the notifier block callback 2019-10-04 11:10:56 -07:00
fib_rules.c ipv6: fix memory leak in fib6_rule_suppress 2021-12-08 09:04:43 +01:00
filter.c bpf: Fix metadata_dst leak __bpf_redirect_neigh_v{4,6} 2025-10-19 16:21:42 +02:00
flow_dissector.c flow_dissector: Fix port range key handling in BPF conversion 2025-03-13 12:50:52 +01:00
flow_offload.c net: extract port range fields from fl_flow_key 2025-03-13 12:50:52 +01:00
gen_estimator.c net_sched: gen_estimator: support large ewma log 2021-01-15 18:11:06 -08:00
gen_stats.c docs: networking: convert gen_stats.txt to ReST 2020-04-28 14:39:46 -07:00
gro_cells.c net: Fix data-races around netdev_max_backlog. 2022-08-31 17:16:42 +02:00
hwbm.c net: hwbm: Make the hwbm_pool lock a mutex 2019-06-09 19:40:10 -07:00
link_watch.c net: linkwatch: use system_unbound_wq 2024-08-19 05:45:35 +02:00
lwt_bpf.c lwt: Fix return values of BPF xmit ops 2023-09-19 12:22:33 +02:00
lwtunnel.c lwtunnel: Validate RTA_ENCAP_TYPE attribute length 2022-01-11 15:35:14 +01:00
Makefile of: net: move of_net under net/ 2022-03-08 19:12:41 +01:00
neighbour.c net/neighbor: add missing policy for NDTPA_QUEUE_LENBYTES 2025-04-10 14:31:54 +02:00
net-procfs.c net-procfs: show net devices bound packet types 2022-02-01 17:27:08 +01:00
net-sysfs.c ethtool: check device is present when getting link settings 2024-09-04 13:23:40 +02:00
net-sysfs.h net-sysfs: add netdev_change_owner() 2020-02-26 20:07:25 -08:00
net-traces.c tcp: add tracepoint for checksum errors 2021-05-14 15:26:03 -07:00
net_namespace.c net: defer final 'struct net' free in netns dismantle 2025-05-02 07:44:23 +02:00
netclassid_cgroup.c bpf, cgroups: Fix cgroup v2 fallback on v1/v2 mixed mode 2021-09-13 16:35:58 -07:00
netevent.c net: core: Correct function name netevent_unregister_notifier() in the kerneldoc 2021-03-28 17:56:56 -07:00
netpoll.c netpoll: prevent hanging NAPI when netcons gets enabled 2025-08-28 16:24:13 +02:00
netprio_cgroup.c bpf, cgroups: Fix cgroup v2 fallback on v1/v2 mixed mode 2021-09-13 16:35:58 -07:00
of_net.c of: net: add a helper for loading netdev->dev_addr 2023-07-27 08:46:59 +02:00
page_pool.c page_pool: Clamp pool size to max 16K pages 2025-12-07 06:09:24 +09:00
pktgen.c net: pktgen: fix access outside of user given buffer in pktgen_thread_write() 2025-06-04 14:38:01 +02:00
ptp_classifier.c ptp: Add generic PTP is_sync() function 2025-09-09 18:50:20 +02:00
request_sock.c tcp: make sure init the accept_queue's spinlocks once 2024-02-23 08:54:27 +01:00
rtnetlink.c net: rtnetlink: fix module reference count leak issue in rtnetlink_rcv_msg 2025-10-29 14:03:16 +01:00
scm.c io_uring/unix: drop usage of io_uring socket 2024-03-26 18:21:11 -04:00
secure_seq.c tcp: Fix data-races around sysctl knobs related to SYN option. 2022-07-29 17:25:22 +02:00
selftests.c net: selftests: fix TCP packet checksum 2025-07-10 15:57:39 +02:00
skbuff.c ipvs: Always clear ipvs_property flag in skb_scrub_packet() 2025-03-13 12:50:57 +01:00
skmsg.c bpf, sockmap: Fix psock incorrectly pointing to sk 2025-08-28 16:24:07 +02:00
sock.c net: call cond_resched() less often in __release_sock() 2025-12-07 06:09:21 +09:00
sock_destructor.h skb_expand_head() adjust skb->truesize incorrectly 2021-10-22 12:35:51 -07:00
sock_diag.c sock_diag: annotate data-races around sock_diag_handlers[family] 2024-03-26 18:21:17 -04:00
sock_map.c bpf, sockmap: Fix race between element replace and close() 2025-04-10 14:31:55 +02:00
sock_reuseport.c soreuseport: Fix socket selection for SO_INCOMING_CPU. 2022-12-31 13:14:07 +01:00
stream.c net: deal with most data-races in sk_wait_event() 2023-05-24 17:36:42 +01:00
sysctl_net_core.c net: let net.core.dev_weight always be non-zero 2025-03-13 12:49:59 +01:00
timestamping.c net: Introduce a new MII time stamping interface. 2019-12-25 19:51:33 -08:00
tso.c net: tso: add UDP segmentation support 2020-06-18 20:46:23 -07:00
utils.c net: Fix checksum update for ILA adj-transport 2025-06-27 11:05:38 +01:00
xdp.c xdp: fix invalid wait context of page_pool_destroy() 2024-08-19 05:44:59 +02:00