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66c556025d
linux/net/core
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Alexander Lobakin 66c556025d skbuff: back tiny skbs with kmalloc() in __netdev_alloc_skb() too 
Commit 3226b158e6 ("net: avoid 32 x truesize under-estimation for
tiny skbs") ensured that skbs with data size lower than 1025 bytes
will be kmalloc'ed to avoid excessive page cache fragmentation and
memory consumption.
However, the fix adressed only __napi_alloc_skb() (primarily for
virtio_net and napi_get_frags()), but the issue can still be achieved
through __netdev_alloc_skb(), which is still used by several drivers.
Drivers often allocate a tiny skb for headers and place the rest of
the frame to frags (so-called copybreak).
Mirror the condition to __netdev_alloc_skb() to handle this case too.

Since v1 [0]:
 - fix "Fixes:" tag;
 - refine commit message (mention copybreak usecase).

[0] https://lore.kernel.org/netdev/20210114235423.232737-1-alobakin@pm.me

Fixes: a1c7fff7e1 ("net: netdev_alloc_skb() use build_skb()")
Signed-off-by: Alexander Lobakin <alobakin@pm.me>
Link: https://lore.kernel.org/r/20210115150354.85967-1-alobakin@pm.me
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-01-16 19:02:04 -08:00
..
bpf_sk_storage.c bpf: Expose bpf_sk_storage_* to iterator programs 2020-12-04 22:32:40 +01:00
datagram.c net: datagram: fix some kernel-doc markups 2020-11-17 14:15:03 -08:00
datagram.h
dev_addr_lists.c net: core: add nested_level variable in net_device 2020-09-28 15:00:15 -07:00
dev_ioctl.c net: dev_ioctl: remove redundant initialization of variable err 2020-11-03 17:49:26 -08:00
dev.c net: Allow NETIF_F_HW_TLS_TX if IP_CSUM && IPV6_CSUM 2021-01-14 10:56:13 -08:00
devlink.c net: core: devlink: simplify the return expression of devlink_nl_cmd_trap_set_doit() 2020-12-08 16:22:54 -08:00
drop_monitor.c genetlink: move to smaller ops wherever possible 2020-10-02 19:11:11 -07:00
dst_cache.c
dst.c net: Correct the comment of dst_dev_put() 2020-09-10 13:28:57 -07:00
failover.c
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 treewide: rename nla_strlcpy to nla_strscpy. 2020-11-16 08:08:54 -08:00
filter.c bpf: Only provide bpf_sock_from_file with CONFIG_NET 2020-12-08 18:23:36 -08:00
flow_dissector.c net: core: fix spelling typo in flow_dissector.c 2020-11-07 15:52:21 -08:00
flow_offload.c net: flow_offload: Fix memory leak for indirect flow block 2020-12-09 16:08:33 -08:00
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 gro_cells: reduce number of synchronize_net() calls 2020-11-25 11:28:12 -08:00
hwbm.c
link_watch.c net: Add IF_OPER_TESTING 2020-04-20 12:43:24 -07:00
lwt_bpf.c lwt_bpf: Replace preempt_disable() with migrate_disable() 2020-12-07 11:53:40 -08:00
lwtunnel.c net: ipv6: add rpl sr tunnel 2020-03-29 22:30:57 -07:00
Makefile ethtool: move to its own directory 2019-12-12 17:07:05 -08:00
neighbour.c net: neighbor: fix a crash caused by mod zero 2020-12-28 14:49:48 -08:00
net_namespace.c fixes-v5.11 2020-12-14 16:40:27 -08:00
net-procfs.c net-sysfs: add backlog len and CPU id to softnet data 2020-09-21 13:56:37 -07:00
net-sysfs.c net-sysfs: take the rtnl lock when accessing xps_rxqs_map and num_tc 2020-12-28 13:26:46 -08:00
net-sysfs.h net-sysfs: add netdev_change_owner() 2020-02-26 20:07:25 -08:00
net-traces.c
netclassid_cgroup.c net: Remove the err argument from sock_from_file 2020-12-04 22:32:40 +01:00
netevent.c
netpoll.c net: Have netpoll bring-up DSA management interface 2020-11-18 11:04:11 -08:00
netprio_cgroup.c net: Remove the err argument from sock_from_file 2020-12-04 22:32:40 +01:00
page_pool.c net: page_pool: Add bulk support for ptr_ring 2020-11-14 02:29:00 +01:00
pktgen.c pktgen: Fix inconsistent of format with argument type in pktgen.c 2020-10-01 18:45:23 -07:00
ptp_classifier.c ptp: Add generic ptp v2 header parsing function 2020-08-19 16:07:49 -07:00
request_sock.c tcp: add rcu protection around tp->fastopen_rsk 2019-10-13 10:13:08 -07:00
rtnetlink.c net: make free_netdev() more lenient with unregistering devices 2021-01-08 19:27:41 -08:00
scm.c fs: Add receive_fd() wrapper for __receive_fd() 2020-07-13 11:03:44 -07:00
secure_seq.c crypto: lib/sha1 - remove unnecessary includes of linux/cryptohash.h 2020-05-08 15:32:17 +10:00
skbuff.c skbuff: back tiny skbs with kmalloc() in __netdev_alloc_skb() too 2021-01-16 19:02:04 -08:00
skmsg.c bpf, sockmap: Avoid failures from skb_to_sgvec when skb has frag_list 2020-11-18 00:14:04 +01:00
sock_diag.c bpf, net: Rework cookie generator as per-cpu one 2020-09-30 11:50:35 -07:00
sock_map.c bpf: Eliminate rlimit-based memory accounting for sockmap and sockhash maps 2020-12-02 18:32:47 -08:00
sock_reuseport.c udp: Prevent reuseport_select_sock from reading uninitialized socks 2021-01-08 19:15:40 -08:00
sock.c net: Remove the err argument from sock_from_file 2020-12-04 22:32:40 +01:00
stream.c
sysctl_net_core.c net: add option to not create fall-back tunnels in root-ns as well 2020-08-28 06:52:44 -07:00
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 skb->csum update in inet_proto_csum_replace16(). 2020-01-24 20:54:30 +01:00
xdp.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-12-11 22:29:38 -08:00