linux/net/core
Eric Dumazet 191ff13e42 net_sched: add qdisc_dequeue_drop() helper
Some qdisc like cake, codel, fq_codel might drop packets
in their dequeue() method.

This is currently problematic because dequeue() runs with
the qdisc spinlock held. Freeing skbs can be extremely expensive.

Add qdisc_dequeue_drop() method and a new TCQ_F_DEQUEUE_DROPS
so that these qdiscs can opt-in to defer the skb frees
after the socket spinlock is released.

TCQ_F_DEQUEUE_DROPS is an attempt to not penalize other qdiscs
with an extra cache line miss.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/20251121083256.674562-14-edumazet@google.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2025-11-25 16:10:32 +01:00
..
bpf_sk_storage.c bpf: Remove unnecessary BTF lookups in bpf_sk_storage_tracing_allowed 2025-01-29 08:51:51 -08:00
datagram.c net: datagram: introduce datagram_poll_queue for custom receive queues 2025-10-23 15:46:04 +02:00
dev.c net_sched: add qdisc_dequeue_drop() helper 2025-11-25 16:10:32 +01:00
dev.h net: Extend NAPI threaded polling to allow kthread based busy polling 2025-11-03 18:11:40 -08:00
dev_addr_lists.c net: s/dev_pre_changeaddr_notify/netif_pre_changeaddr_notify/ 2025-07-18 17:27:47 -07:00
dev_addr_lists_test.c net: dev_addr_lists: move locking out of init/exit in kunit 2024-04-15 10:26:35 +01:00
dev_api.c net: define an enum for the napi threaded state 2025-07-24 18:34:55 -07:00
dev_ioctl.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2025-11-20 09:13:26 -08:00
devmem.c net: devmem: refresh devmem TX dst in case of route invalidation 2025-10-29 19:23:21 -07:00
devmem.h net: devmem: Remove unused declaration net_devmem_bind_tx_release() 2025-11-04 17:29:19 -08:00
drop_monitor.c treewide, timers: Rename from_timer() to timer_container_of() 2025-06-08 09:07:37 +02:00
dst.c net: dst: introduce dst->dev_rcu 2025-08-29 19:36:31 -07:00
dst_cache.c net: dst: annotate data-races around dst->obsolete 2025-07-02 14:32:29 -07:00
failover.c net: failover: use IFF_NO_ADDRCONF flag to prevent ipv6 addrconf 2022-12-12 15:18:25 -08:00
fib_notifier.c net: do not acquire rtnl in fib_seq_sum() 2024-10-11 15:35:05 -07:00
fib_rules.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2025-04-17 12:26:50 -07:00
filter.c bpf: Make bpf_skb_change_head helper metadata-safe 2025-11-10 10:52:32 -08:00
flow_dissector.c net: remove '__' from __skb_flow_get_ports() 2025-02-24 14:27:53 -08:00
flow_offload.c tc: flower: Enable offload support IPSEC SPI field. 2023-08-02 10:09:32 +01:00
gen_estimator.c net_sched: gen_estimator: fix est_timer() vs CONFIG_PREEMPT_RT=y 2025-08-29 19:04:20 -07:00
gen_stats.c net: Remove the obsolte u64_stats_fetch_*_irq() users (net). 2022-10-28 20:13:54 -07:00
gro.c net: gro: clear skb_shinfo(skb)->hwtstamps in napi_reuse_skb() 2025-10-16 15:42:49 -07:00
gro_cells.c net: gro_cells: Reduce lock scope in gro_cell_poll 2025-11-05 17:41:29 -08:00
gso.c net: introduce struct net_hotdata 2024-03-07 21:12:41 -08:00
hotdata.c net: increase skb_defer_max default to 128 2025-11-07 19:02:40 -08:00
hwbm.c
ieee8021q_helpers.c net: ieee8021q: fix insufficient table-size assertion 2025-07-01 12:55:49 +02:00
link_watch.c net: replace use of system_unbound_wq with system_dfl_wq 2025-09-22 17:40:30 -07:00
lock_debug.c netdev: fix the locking for netdev notifications 2025-04-17 18:55:14 -07:00
lwt_bpf.c ipv4: Convert ->flowi4_tos to dscp_t. 2025-08-26 17:34:31 -07:00
lwtunnel.c inet: Remove rtnl_is_held arg of lwtunnel_valid_encap_type(_attr)?(). 2025-05-20 19:18:24 -07:00
Makefile queue_api: add support for fetching per queue DMA dev 2025-08-28 16:05:31 -07:00
mp_dmabuf_devmem.h memory-provider: dmabuf devmem memory provider 2024-09-11 20:44:31 -07:00
neighbour.c neighbour: Convert rwlock of struct neigh_table to spinlock. 2025-10-24 17:57:20 -07:00
net-procfs.c net: use NUMA drop counters for softnet_data.dropped 2025-09-14 11:35:17 -07:00
net-sysfs.c Networking changes for 6.18. 2025-10-02 15:17:01 -07:00
net-sysfs.h net: remove RTNL use for /proc/sys/net/core/rps_default_mask 2025-07-07 18:42:12 -07:00
net-traces.c move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
net_namespace.c tcp: add net.ipv4.tcp_rcvbuf_low_rtt 2025-11-20 17:44:23 -08:00
net_test.c pfcp: always set pfcp metadata 2024-04-01 10:49:28 +01:00
netclassid_cgroup.c net, bpf: Fix RCU usage in task_cls_state() for BPF programs 2025-06-11 21:30:29 +02:00
netdev-genl-gen.c net: Extend NAPI threaded polling to allow kthread based busy polling 2025-11-03 18:11:40 -08:00
netdev-genl-gen.h net: devmem: TCP tx netlink api 2025-05-13 11:12:48 +02:00
netdev-genl.c net: devmem: allow binding on rx queues with same DMA devices 2025-08-28 16:05:32 -07:00
netdev_queues.c queue_api: add support for fetching per queue DMA dev 2025-08-28 16:05:31 -07:00
netdev_rx_queue.c net: add helper to pre-check if PP for an Rx queue will be unreadable 2025-09-04 10:19:17 +02:00
netevent.c
netmem_priv.h netmem: replace __netmem_clear_lsb() with netmem_to_nmdesc() 2025-10-14 13:37:26 +02:00
netpoll.c net: netpoll: fix incorrect refcount handling causing incorrect cleanup 2025-11-10 18:34:44 -08:00
netprio_cgroup.c
of_net.c net: Explicitly include correct DT includes 2023-07-27 20:33:16 -07:00
page_pool.c page_pool: Fix PP_MAGIC_MASK to avoid crashing on some 32-bit arches 2025-10-06 12:14:04 -07:00
page_pool_priv.h net: page_pool: don't try to stash the napi id 2025-01-27 14:37:41 -08:00
page_pool_user.c net: use napi_id_valid helper 2025-02-17 16:43:04 -08:00
pktgen.c net: pktgen: Use min()/min_t() to improve pktgen_finalize_skb() 2025-08-21 10:12:11 +02:00
ptp_classifier.c ptp: Add generic PTP is_sync() function 2022-03-07 11:31:34 +00:00
request_sock.c tcp: Remove stale locking comment for TFO. 2025-09-23 18:21:36 -07:00
rtnetlink.c rtnetlink: honor RTEXT_FILTER_SKIP_STATS in IFLA_STATS 2025-11-04 16:07:37 -08:00
scm.c scm: use masked_user_access_begin() in put_cmsg() 2025-09-29 18:03:42 -07:00
secure_seq.c net: Retire DCCP socket. 2025-04-11 18:58:10 -07:00
selftests.c net: selftests: export packet creation helpers for driver use 2025-11-06 13:38:11 +01:00
skb_fault_injection.c net: Implement fault injection forcing skb reallocation 2024-11-12 12:05:33 +01:00
skbuff.c net: prefetch the next skb in napi_skb_cache_get() 2025-11-19 20:29:25 -08:00
skmsg.c net: replace use of system_wq with system_percpu_wq 2025-09-22 17:40:30 -07:00
sock.c net: factor-out _sk_charge() helper 2025-11-24 19:49:40 -08:00
sock_destructor.h
sock_diag.c net: WQ_PERCPU added to alloc_workqueue users 2025-09-22 17:40:30 -07:00
sock_map.c bpf: Remove attach_type in sockmap_link 2025-07-11 10:51:55 -07:00
sock_reuseport.c net: core: annotate socks of struct sock_reuseport with __counted_by 2024-08-02 17:16:59 -07:00
stream.c net: stream: add description for sk_stream_write_space() 2025-07-18 16:57:21 -07:00
sysctl_net_core.c net: Introduce net.core.bypass_prot_mem sysctl. 2025-10-16 12:04:47 -07:00
timestamping.c net: Add the possibility to support a selected hwtstamp in netdevice 2024-12-16 12:51:40 +00:00
tso.c move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
utils.c net: Fix checksum update for ILA adj-transport 2025-05-30 19:53:51 -07:00
xdp.c net: xdp: pass full flags to xdp_update_skb_shared_info() 2025-09-11 12:00:20 +02:00