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8efa885406
kernel_optimize_test/net
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Eric Dumazet 8efa885406 sch_sfq: avoid giving spurious NET_XMIT_CN signals 
While chasing a possible net_sched bug, I found that IP fragments have
litle chance to pass a congestioned SFQ qdisc :

- Say SFQ qdisc is full because one flow is non responsive.
- ip_fragment() wants to send two fragments belonging to an idle flow.
- sfq_enqueue() queues first packet, but see queue limit reached :
- sfq_enqueue() drops one packet from 'big consumer', and returns
NET_XMIT_CN.
- ip_fragment() cancel remaining fragments.

This patch restores fairness, making sure we return NET_XMIT_CN only if
we dropped a packet from the same flow.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
CC: Patrick McHardy <kaber@trash.net>
CC: Jarek Poplawski <jarkao2@gmail.com>
CC: Jamal Hadi Salim <hadi@cyberus.ca>
CC: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-05-23 17:36:00 -04:00
..
9p Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2011-05-20 13:43:21 -07:00
802 snap: remove one synchronize_net() 2011-05-23 16:29:24 -04:00
8021q net: Fix vlan_features propagation 2011-05-12 17:54:13 -04:00
appletalk appletalk: Fix OOPS in atalk_release(). 2011-03-31 18:59:10 -07:00
atm atm: lec: Fix set-but-unused variables. 2011-04-17 00:48:36 -07:00
ax25 ax25: Fix set-but-unused variable. 2011-04-17 00:48:31 -07:00
batman-adv Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2011-05-20 13:43:21 -07:00
bluetooth Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 2011-05-23 09:10:03 -07:00
bridge net: remove synchronize_net() from netdev_set_master() 2011-05-22 21:01:20 -04:00
caif caif: Plug memory leak for checksum error 2011-05-22 20:11:49 -04:00
can can: rename can_try_module_get to can_get_proto 2011-05-04 14:08:37 -07:00
ceph libceph: fix ceph_osdc_alloc_request error checks 2011-05-03 09:28:13 -07:00
core pktgen: refactor pg_init() code 2011-05-22 21:01:22 -04:00
dcb net: dcbnl: Update copyright dates 2011-03-14 17:02:42 -07:00
dccp ipv4: Make caller provide flowi4 key to inet_csk_route_req(). 2011-05-18 18:32:03 -04:00
decnet Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2011-05-20 13:43:21 -07:00
dns_resolver DNS: Fix a NULL pointer deref when trying to read an error key [CVE-2011-1076] 2011-03-04 09:56:19 +11:00
dsa Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2011-05-05 14:59:02 -07:00
econet econet: Fix set-but-unused variable. 2011-04-17 00:15:22 -07:00
ethernet
ieee802154 ieee802154: Remove hacked CFLAGS in net/ieee802154/Makefile 2011-04-12 15:33:23 -07:00
ipv4 net: ping: cleanups ping_v4_unhash() 2011-05-23 16:29:24 -04:00
ipv6 ipv6: copy prefsrc setting when copying route entry 2011-05-21 02:05:22 -04:00
ipx ipx: fix ipx_release() 2011-03-21 18:16:39 -07:00
irda irda: Fix error propagation in ircomm_lmp_connect_response() 2011-05-19 18:58:39 -04:00
iucv convert old cpumask API into new one 2011-05-13 14:55:21 -04:00
key inet: constify ip headers and in6_addr 2011-04-22 11:04:14 -07:00
l2tp Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2011-05-20 13:43:21 -07:00
lapb
llc llc: Fix length check in llc_fixup_skb(). 2011-04-11 18:59:05 -07:00
mac80211 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2011-05-20 13:43:21 -07:00
netfilter Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2011-05-23 09:12:26 -07:00
netlabel Remove prefetch() from <linux/skbuff.h> and "netlabel_addrlist.h" 2011-05-22 21:43:41 -07:00
netlink net,rcu: convert call_rcu(listeners_free_rcu) to kfree_rcu() 2011-05-07 22:50:51 -07:00
netrom NET: AX.25, NETROM, ROSE: Remove SOCK_DEBUG calls 2011-04-14 00:20:07 -07:00
packet net: filter: Just In Time compiler for x86-64 2011-04-27 23:05:08 -07:00
phonet Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2011-05-20 13:43:21 -07:00
rds Fix common misspellings 2011-03-31 11:26:23 -03:00
rfkill net/rfkill/core.c: Avoid leaving freed data in a list 2011-05-16 14:10:42 -04:00
rose NET: AX.25, NETROM, ROSE: Remove SOCK_DEBUG calls 2011-04-14 00:20:07 -07:00
rxrpc rxrpc: Fix set but unused variable 'usage' in rxrpc_get_transport() 2011-05-19 18:51:50 -04:00
sched sch_sfq: avoid giving spurious NET_XMIT_CN signals 2011-05-23 17:36:00 -04:00
sctp sctp: Fix build failure. 2011-05-21 02:10:23 -04:00
sunrpc Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2011-05-23 09:12:26 -07:00
tipc tipc: Revise timings used when sending link request messages 2011-05-10 16:04:02 -04:00
unix af_unix: Only allow recv on connected seqpacket sockets. 2011-05-01 23:16:28 -07:00
wanrouter Fix common misspellings 2011-03-31 11:26:23 -03:00
wimax
wireless Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6 into for-davem 2011-05-16 19:32:19 -04:00
x25 Fix common misspellings 2011-03-31 11:26:23 -03:00
xfrm Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-3.6 2011-05-11 14:26:58 -04:00
compat.c net: Add sendmmsg socket system call 2011-05-05 11:10:14 -07:00
Kconfig bpf: depends on MODULES 2011-04-29 10:20:53 -07:00
Makefile net: Enter net/ipv6/ even if CONFIG_IPV6=n 2011-03-07 12:50:52 -08:00
nonet.c
socket.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2011-05-20 13:43:21 -07:00
sysctl_net.c
TUNABLE