AuxXxilium/linux_dsm_epyc7002
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63d75463c9
linux_dsm_epyc7002/net
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Paolo Abeni 63d75463c9 net: pktgen: fix pkt_size 
The commit 879c7220e8 ("net: pktgen: Observe needed_headroom
of the device") increased the 'pkt_overhead' field value by
LL_RESERVED_SPACE.
As a side effect the generated packet size, computed as:

	/* Eth + IPh + UDPh + mpls */
	datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
		  pkt_dev->pkt_overhead;

is decreased by the same value.
The above changed slightly the behavior of existing pktgen users,
and made the procfs interface somewhat inconsistent.
Fix it by restoring the previous pkt_overhead value and using
LL_RESERVED_SPACE as extralen in skb allocation.
Also, change pktgen_alloc_skb() to only partially reserve
the headroom to allow the caller to prefetch from ll header
start.

v1 -> v2:
 - fixed some typos in the comments

Fixes: 879c7220e8 ("net: pktgen: Observe needed_headroom of the device")
Suggested-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-03 01:29:57 -04:00
..
6lowpan 6lowpan: ndisc: no overreact if no short address is available 2016-09-19 20:19:34 +02:00
9p 9p/trans_virtio: use kvfree() for iov_iter_get_pages_alloc() 2016-08-09 13:42:36 +03:00
802
8021q net: remove type_check from dev_get_nest_level() 2016-08-13 15:15:54 -07:00
appletalk appletalk: use IS_ENABLED() instead of checking for built-in or module 2016-09-10 21:19:10 -07:00
atm lec: use IS_ENABLED() instead of checking for built-in or module 2016-09-10 21:19:10 -07:00
ax25 AX.25: Close socket connection on session completion 2016-06-18 20:55:34 -07:00
batman-adv Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-09-23 06:46:57 -04:00
bluetooth Bluetooth: Fix not updating scan rsp when adv off 2016-09-22 17:48:23 +02:00
bridge netfilter: bridge: clarify bridge/netfilter message 2016-10-02 22:44:03 -04:00
caif caif: Remove unneeded header file 2016-06-28 05:26:14 -04:00
can can: only call can_stat_update with procfs 2016-06-23 11:23:49 +02:00
ceph libceph: using kfree_rcu() to simplify the code 2016-08-08 21:41:42 +02:00
core net: pktgen: fix pkt_size 2016-10-03 01:29:57 -04:00
dcb
dccp Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2016-07-29 17:38:46 -07:00
decnet net: fix decnet rtnexthop parsing 2016-07-05 14:08:47 -07:00
dns_resolver KEYS: Add a facility to restrict new links into a keyring 2016-04-11 22:37:37 +01:00
dsa net: dsa: add port fast ageing 2016-09-23 08:38:50 -04:00
ethernet
hsr net/hsr: Use setup_timer and mod_timer. 2016-05-16 14:00:43 -04:00
ieee802154 ieee802154: 6lowpan: fix intra pan id check 2016-07-08 13:23:12 +02:00
ipv4 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-10-02 22:20:41 -04:00
ipv6 ipv6 addrconf: remove addrconf_sysctl_hop_limit() 2016-10-02 23:48:13 -04:00
ipx
irda Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-09-23 06:46:57 -04:00
iucv Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2016-07-29 17:38:46 -07:00
kcm Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-09-12 15:52:44 -07:00
key
l2tp l2tp: constify net_device_ops structures 2016-09-17 10:07:23 -04:00
l3mdev net: ipv6: Remove l3mdev_get_saddr6 2016-09-10 23:12:53 -07:00
lapb net/lapb: tuse %*ph to dump buffers 2016-05-29 22:33:25 -07:00
llc llc: switch type to bool as the timeout is only tested versus 0 2016-09-17 10:05:05 -04:00
mac80211 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-09-23 06:46:57 -04:00
mac802154 mac802154: use rate limited warnings for malformed frames 2016-09-19 20:19:34 +02:00
mpls mpls: get rid of trivial returns 2016-09-01 10:13:15 -07:00
ncsi net/ncsi: avoid maybe-uninitialized warning 2016-07-25 10:32:59 -07:00
netfilter Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2016-09-25 23:34:19 +02:00
netlabel netlabel: Implement CALIPSO config functions for SMACK. 2016-06-27 15:06:18 -04:00
netlink netlink: don't forget to release a rhashtable_iter structure 2016-09-07 17:29:38 -07:00
netrom
nfc NFC: digital: Fix RTOX supervisor PDU handling 2016-07-11 02:02:03 +02:00
openvswitch openvswitch: avoid resetting flow key while installing new flow. 2016-09-20 22:54:35 -04:00
packet Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-07-24 00:53:32 -04:00
phonet
qrtr Merge tag 'qcom-soc-for-4.7-2' into net-next 2016-05-17 14:11:19 -04:00
rds RDS: add __printf format attribute to error reporting functions 2016-08-08 16:16:21 -07:00
rfkill
rose rose: limit sk_filter trim to payload 2016-07-13 11:53:40 -07:00
rxrpc rxrpc: Note serial number being ACK'd in the congestion management trace 2016-09-29 22:57:47 +01:00
sched Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-10-02 22:20:41 -04:00
sctp Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-10-02 22:20:41 -04:00
strparser kcm: Remove TCP specific references from kcm and strparser 2016-08-28 23:32:41 -04:00
sunrpc Fix a memory corruption bug that I introduced in 4.7. 2016-09-16 17:00:26 -07:00
switchdev switchdev: remove FIB offload infrastructure 2016-09-28 04:48:00 -04:00
tipc tipc: fix possible memory leak in tipc_udp_enable() 2016-09-13 11:28:32 -04:00
unix af_unix: split 'u->readlock' into two: 'iolock' and 'bindlock' 2016-09-04 13:29:29 -07:00
vmw_vsock VSOCK: Don't dec ack backlog twice for rejected connections 2016-09-27 07:59:25 -04:00
wimax
wireless Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-09-23 06:46:57 -04:00
x25 net: x25: remove null checks on arrays calling_ae and called_ae 2016-09-09 18:13:30 -07:00
xfrm proc: Reduce cache miss in xfrm_statistics_seq_show 2016-09-30 01:50:45 -04:00
compat.c packet: compat support for sock_fprog 2016-06-09 23:41:03 -07:00
Kconfig strparser: Stream parser for messages 2016-08-17 19:36:23 -04:00
Makefile strparser: Stream parser for messages 2016-08-17 19:36:23 -04:00
socket.c fs: poll/select/recvmmsg: use timespec64 for timeout events 2016-05-19 19:12:14 -07:00
sysctl_net.c net: Use ns_capable_noaudit() when determining net sysctl permissions 2016-10-01 03:24:28 -04:00