AcoSail/kernel_optimize_test
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48d83325b6
kernel_optimize_test/include/net
History
Herbert Xu 48d83325b6 [NET]: Prevent multiple qdisc runs 
Having two or more qdisc_run's contend against each other is bad because
it can induce packet reordering if the packets have to be requeued.  It
appears that this is an unintended consequence of relinquinshing the queue
lock while transmitting.  That in turn is needed for devices that spend a
lot of time in their transmit routine.

There are no advantages to be had as devices with queues are inherently
single-threaded (the loopback device is not but then it doesn't have a
queue).

Even if you were to add a queue to a parallel virtual device (e.g., bolt
a tbf filter in front of an ipip tunnel device), you would still want to
process the queue in sequence to ensure that the packets are ordered
correctly.

The solution here is to steal a bit from net_device to prevent this.

BTW, as qdisc_restart is no longer used by anyone as a module inside the
kernel (IIRC it used to with netif_wake_queue), I have not exported the
new __qdisc_run function.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-06-19 23:57:59 -07:00
..
bluetooth [Bluetooth] Reduce L2CAP MTU for RFCOMM connections 2006-02-13 11:39:57 +01:00
irda [IRDA]: fixup type of ->lsap_state 2006-05-22 16:54:30 -07:00
netfilter [SECMARK]: Add secmark support to conntrack 2006-06-17 21:30:01 -07:00
sctp [SCTP] Reset rtt_in_progress for the chunk when processing its sack. 2006-06-17 22:56:08 -07:00
tc_act [NETFILTER]: futher {ip,ip6,arp}_tables unification 2006-03-22 13:56:56 -08:00
tipc [TIPC] More updates of file headers 2006-01-12 14:06:39 -08:00
act_api.h [PKT_SCHED]: Convert tc action functions to single skb pointers 2006-01-09 14:16:08 -08:00
act_generic.h
addrconf.h [NET]: Fix sparse warnings 2005-08-29 16:01:32 -07:00
af_unix.h [NET]: sem2mutex part 2 2006-03-20 22:35:41 -08:00
ah.h
arp.h [IPV4]: Possible cleanups. 2006-04-14 15:00:20 -07:00
atmclip.h [INET_SOCK]: Move struct inet_sock & helper functions to net/inet_sock.h 2006-01-03 13:11:21 -08:00
ax25.h [AX.25]: Eleminate HZ from AX.25 kernel interfaces 2006-05-03 23:27:16 -07:00
checksum.h
compat.h [PATCH] net/compat.h build fix 2006-05-31 16:27:11 -07:00
datalink.h [NET]: Kill skb->real_dev 2005-08-29 15:32:25 -07:00
dn_dev.h [DECnet]: Endian annotation and fixes for DECnet. 2006-03-20 22:42:39 -08:00
dn_fib.h [DECnet]: Endian annotation and fixes for DECnet. 2006-03-20 22:42:39 -08:00
dn_neigh.h [DECnet]: Endian annotation and fixes for DECnet. 2006-03-20 22:42:39 -08:00
dn_nsp.h [DECnet]: Endian annotation and fixes for DECnet. 2006-03-20 22:42:39 -08:00
dn_route.h [DECnet]: Endian annotation and fixes for DECnet. 2006-03-20 22:42:39 -08:00
dn.h [DECnet]: Endian annotation and fixes for DECnet. 2006-03-20 22:42:39 -08:00
dsfield.h
dst.h [XFRM]: Netfilter IPsec output hooks 2006-01-07 12:57:28 -08:00
esp.h
flow.h [DECnet]: Endian annotation and fixes for DECnet. 2006-03-20 22:42:39 -08:00
gen_stats.h
genetlink.h [PATCH] genetlink: don't touch module ref count 2006-01-13 13:06:40 -08:00
icmp.h [INET_SOCK]: Move struct inet_sock & helper functions to net/inet_sock.h 2006-01-03 13:11:21 -08:00
ieee80211_crypt.h [PATCH] ieee80211: Add TKIP crypt->build_iv 2006-01-27 17:08:07 -05:00
ieee80211_radiotap.h [PATCH] ieee80211: Added ieee80211_radiotap.h 2005-09-21 23:03:55 -04:00
ieee80211.h [PATCH] softmac: complete shared key authentication 2006-06-05 15:51:29 -04:00
ieee80211softmac_wx.h [PATCH] softmac: add SIOCSIWMLME 2006-04-24 16:15:58 -04:00
ieee80211softmac.h [PATCH] softmac: Fix handling of authentication failure 2006-06-05 15:51:30 -04:00
if_inet6.h [IPV6]: ADDRCONF: Use our standard algorithm for randomized ifid. 2006-03-20 16:54:09 -08:00
inet6_connection_sock.h [IPV6]: Generalise some functions 2006-01-03 13:10:46 -08:00
inet6_hashtables.h [IPV6]: Deinline few large functions in inet6 code 2006-04-09 22:48:59 -07:00
inet_common.h [NET]: move struct proto_ops to const 2006-01-03 13:11:15 -08:00
inet_connection_sock.h [ICSK] compat: Introduce inet_csk_compat_[gs]etsockopt 2006-03-20 22:46:16 -08:00
inet_ecn.h [INET_SOCK]: Move struct inet_sock & helper functions to net/inet_sock.h 2006-01-03 13:11:21 -08:00
inet_hashtables.h [INET_SOCK]: Move struct inet_sock & helper functions to net/inet_sock.h 2006-01-03 13:11:21 -08:00
inet_sock.h [INET_SOCK]: Move struct inet_sock & helper functions to net/inet_sock.h 2006-01-03 13:11:21 -08:00
inet_timewait_sock.h [NET]: use hlist_unhashed() 2006-04-29 18:33:15 -07:00
inetpeer.h [IPV4]: Safer reassembly 2006-01-03 13:10:31 -08:00
ip6_checksum.h
ip6_fib.h
ip6_route.h [IPV6]: ROUTE: Add experimental support for Route Information Option in RA (RFC4191). 2006-03-20 17:06:24 -08:00
ip6_tunnel.h
ip_fib.h [INET_SOCK]: Move struct inet_sock & helper functions to net/inet_sock.h 2006-01-03 13:11:21 -08:00
ip_mp_alg.h
ip_vs.h [INET_SOCK]: Move struct inet_sock & helper functions to net/inet_sock.h 2006-01-03 13:11:21 -08:00
ip.h [NET]: net.ipv4.ip_autoconfig sysctl removal 2006-06-17 21:30:30 -07:00
ipcomp.h
ipconfig.h
ipip.h
ipv6.h [IPV6]: Clean up hop-by-hop options handler. 2006-04-18 15:57:53 -07:00
ipx.h
iw_handler.h [PATCH] WE-20 for kernel 2.6.16 2006-03-23 07:12:57 -05:00
lapb.h
llc_c_ac.h
llc_c_ev.h
llc_c_st.h
llc_conn.h [PATCH] gfp flags annotations - part 1 2005-10-08 15:00:57 -07:00
llc_if.h [LLC]: add multicast support for datagrams 2006-06-17 21:26:08 -07:00
llc_pdu.h [LLC]: Fix typo 2005-11-14 21:58:18 -08:00
llc_s_ac.h
llc_s_ev.h
llc_s_st.h
llc_sap.h [LLC]: Fix the accept path 2005-09-22 07:57:21 -03:00
llc.h [LLC]: llc_mac_hdr_init const arguments 2006-03-20 22:59:36 -08:00
ndisc.h [IPV6]: ROUTE: Add experimental support for Route Information Option in RA (RFC4191). 2006-03-20 17:06:24 -08:00
neighbour.h [NEIGH]: Fix IP-over-ATM and ARP interaction. 2006-05-12 14:56:08 -07:00
netdma.h [I/OAT]: Utility functions for offloading sk_buff to iovec copies 2006-06-17 21:25:46 -07:00
netlink.h [NETLINK]: Generic netlink receive queue processor 2005-11-10 02:26:40 +01:00
netrom.h [NETROM]: Eleminate HZ from NET/ROM kernel interfaces 2006-05-03 23:27:47 -07:00
p8022.h [NET]: Fix sparse warnings 2005-08-29 16:01:32 -07:00
pkt_act.h [INET_SOCK]: Move struct inet_sock & helper functions to net/inet_sock.h 2006-01-03 13:11:21 -08:00
pkt_cls.h [NET]: Remove explicit initializations of skb->input_dev 2005-08-29 15:33:26 -07:00
pkt_sched.h [NET]: Prevent multiple qdisc runs 2006-06-19 23:57:59 -07:00
protocol.h [IPV6]: Move nextheader offset to the IP6CB 2006-01-07 12:57:29 -08:00
psnap.h [NET]: Kill skb->real_dev 2005-08-29 15:32:25 -07:00
raw.h [IPV4]: Right prototype of __raw_v4_lookup() 2006-06-17 21:29:39 -07:00
rawv6.h [IPV4/6]: Check if packet was actually delivered to a raw socket to decide whether to send an ICMP unreachable 2005-08-29 15:37:22 -07:00
red.h [PKT_SCHED]: Generic RED layer 2005-11-05 22:02:24 +01:00
request_sock.h [NET]: drop duplicate assignment in request_sock 2006-03-26 17:39:55 -08:00
rose.h [ROSE]: Eleminate HZ from ROSE kernel interfaces 2006-05-03 23:28:20 -07:00
route.h [IPV4]: Aggregate route entries with different TOS values 2006-03-25 01:38:55 -08:00
sch_generic.h
scm.h [AF_UNIX]: scm: better initialization 2006-03-20 21:31:51 -08:00
slhc_vj.h
snmp.h
sock.h [NET]: skb_trim audit 2006-06-17 21:30:20 -07:00
syncppp.h [PATCH] drivers/net/wan/: possible cleanups 2005-09-14 08:36:54 -04:00
tcp_ecn.h [NET]: Introduce inet_connection_sock 2005-08-29 15:43:19 -07:00
tcp_states.h [TCP]: Move the TCPF_ enum to tcp_states.h 2006-01-03 13:10:57 -08:00
tcp.h [TCP]: Add tcp_slow_start_after_idle sysctl. 2006-06-17 21:30:53 -07:00
timewait_sock.h [TWSK]: Introduce struct timewait_sock_ops 2006-01-03 13:10:54 -08:00
transp_v6.h [ICSK]: Rename struct tcp_func to struct inet_connection_sock_af_ops 2006-01-03 13:10:38 -08:00
udp.h [INET_SOCK]: Move struct inet_sock & helper functions to net/inet_sock.h 2006-01-03 13:11:21 -08:00
x25.h [X25]: allow ITU-T DTE facilities for x25 2006-03-22 00:01:31 -08:00
x25device.h [X25]: Restore skb->dev setting in x25_type_trans(). 2006-04-09 22:37:18 -07:00
xfrm.h [IPSEC] xfrm: Use IPPROTO_MAX instead of 256 2006-06-17 21:28:43 -07:00