AuxXxilium/linux_dsm_epyc7002
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c377411f24
linux_dsm_epyc7002/net
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Eric Dumazet c377411f24 net: sk_add_backlog() take rmem_alloc into account 
Current socket backlog limit is not enough to really stop DDOS attacks,
because user thread spend many time to process a full backlog each
round, and user might crazy spin on socket lock.

We should add backlog size and receive_queue size (aka rmem_alloc) to
pace writers, and let user run without being slow down too much.

Introduce a sk_rcvqueues_full() helper, to avoid taking socket lock in
stress situations.

Under huge stress from a multiqueue/RPS enabled NIC, a single flow udp
receiver can now process ~200.000 pps (instead of ~100 pps before the
patch) on a 8 core machine.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-04-27 15:13:20 -07:00
..
9p Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs 2010-04-05 13:42:54 -07:00
802 Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-04-11 14:53:53 -07:00
8021q Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-04-11 14:53:53 -07:00
appletalk Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-04-11 14:53:53 -07:00
atm net: sk_sleep() helper 2010-04-20 16:37:13 -07:00
ax25 net: sk_sleep() helper 2010-04-20 16:37:13 -07:00
bluetooth net: sk_sleep() helper 2010-04-20 16:37:13 -07:00
bridge bridge: multicast router list manipulation 2010-04-27 12:53:24 -07:00
caif net: use sk_sleep() 2010-04-26 11:18:45 -07:00
can can: avoids a false warning 2010-04-13 03:03:14 -07:00
core net: sk_add_backlog() take rmem_alloc into account 2010-04-27 15:13:20 -07:00
dcb include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
dccp net: sk_sleep() helper 2010-04-20 16:37:13 -07:00
decnet net: rtnetlink: decouple rtnetlink address families from real address families 2010-04-26 16:13:54 +02:00
dsa Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-04-11 14:53:53 -07:00
econet include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
ethernet ethernet: print protocol in host byte order 2010-04-21 22:57:19 -07:00
ieee802154 ieee802154: Fix oops during ieee802154_sock_ioctl 2010-04-26 11:20:32 -07:00
ipv4 net: sk_add_backlog() take rmem_alloc into account 2010-04-27 15:13:20 -07:00
ipv6 net: sk_add_backlog() take rmem_alloc into account 2010-04-27 15:13:20 -07:00
ipx include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
irda net: sk_sleep() helper 2010-04-20 16:37:13 -07:00
iucv net: sk_sleep() helper 2010-04-20 16:37:13 -07:00
key include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
l2tp l2tp_eth: fix memory allocation 2010-04-23 16:37:33 -07:00
lapb include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
llc net: sk_sleep() helper 2010-04-20 16:37:13 -07:00
mac80211 Merge branch 'master' into for-davem 2010-04-23 14:43:45 -04:00
netfilter net: sk_sleep() helper 2010-04-20 16:37:13 -07:00
netlabel Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2010-04-06 08:34:06 -07:00
netlink Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-04-11 14:53:53 -07:00
netrom net: sk_sleep() helper 2010-04-20 16:37:13 -07:00
packet Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-04-21 01:14:25 -07:00
phonet phonet: use phonet_pernet instead of directly net_generic 2010-04-26 11:18:44 -07:00
rds Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-04-27 12:49:13 -07:00
rfkill Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-04-11 14:53:53 -07:00
rose net: sk_sleep() helper 2010-04-20 16:37:13 -07:00
rxrpc net: use sk_sleep() 2010-04-26 11:18:45 -07:00
sched net: Fix various endianness glitches 2010-04-20 19:06:52 -07:00
sctp net: sk_add_backlog() take rmem_alloc into account 2010-04-27 15:13:20 -07:00
sunrpc Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-04-21 01:14:25 -07:00
tipc net: sk_sleep() helper 2010-04-20 16:37:13 -07:00
unix net: sk_sleep() helper 2010-04-20 16:37:13 -07:00
wanrouter headers: smp_lock.h redux 2009-07-12 12:22:34 -07:00
wimax Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-04-11 14:53:53 -07:00
wireless Merge branch 'master' into for-davem 2010-04-23 14:43:45 -04:00
x25 Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-04-27 12:49:13 -07:00
xfrm net: Fix various endianness glitches 2010-04-20 19:06:52 -07:00
compat.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
Kconfig l2tp: Split pppol2tp patch into separate l2tp and ppp parts 2010-04-03 14:56:02 -07:00
Makefile l2tp: Split pppol2tp patch into separate l2tp and ppp parts 2010-04-03 14:56:02 -07:00
nonet.c
socket.c fasync: RCU and fine grained locking 2010-04-21 16:19:29 -07:00
sysctl_net.c net: spread __net_init, __net_exit 2010-01-17 19:16:02 -08:00
TUNABLE