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linux-2.6/net
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Willy Tarreau 02275a2ee7 tcp: don't abort splice() after small transfers 
TCP coalescing added a regression in splice(socket->pipe) performance,
for some workloads because of the way tcp_read_sock() is implemented.

The reason for this is the break when (offset + 1 != skb->len).

As we released the socket lock, this condition is possible if TCP stack
added a fragment to the skb, which can happen with TCP coalescing.

So let's go back to the beginning of the loop when this happens,
to give a chance to splice more frags per system call.

Doing so fixes the issue and makes GRO 10% faster than LRO
on CPU-bound splice() workloads instead of the opposite.

Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 		2012-12-02 20:23:01 -05:00
..
9p The following changes since commit 4cbe5a555fa58a79b6ecbb6c531b8bab0650778d: 2012-10-12 09:59:23 +09:00
802
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8021q 8021q: fix vlan device to inherit the unicast filtering capability flag 2012-11-30 12:07:27 -05:00
appletalk userns: Print out socket uids in a user namespace aware fashion. 2012-08-14 21:48:06 -07:00
atm pppoatm: optimise PPP channel wakeups after sock_owned_by_user() 2012-12-02 00:05:20 +00:00
ax25 userns: Convert net/ax25 to use kuid_t where appropriate 2012-08-14 21:49:42 -07:00
batman-adv batman-adv: use ETH_P_BATMAN 2012-11-30 10:50:22 +01:00
bluetooth Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next 2012-11-21 13:03:00 -05:00
bridge net: Enable a userns root rtnl calls that are safe for unprivilged users 2012-11-18 20:33:36 -05:00
caif caif: Remove redundant null check before kfree in cfctrl.c 2012-11-20 13:48:09 -05:00
can Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-11-29 12:51:17 -05:00
ceph Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client 2012-10-29 08:49:25 -07:00
core rtnelink: remove unused parameter from rtnl_create_link(). 2012-11-30 12:24:40 -05:00
dcb net: Push capable(CAP_NET_ADMIN) into the rtnl methods 2012-11-18 20:32:44 -05:00
dccp tcp: better retrans tracking for defer-accept 2012-11-03 14:45:00 -04:00
decnet net: Push capable(CAP_NET_ADMIN) into the rtnl methods 2012-11-18 20:32:44 -05:00
dns_resolver Merge branch 'modules-next' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux 2012-10-14 13:39:34 -07:00
dsa dsa: Hide core config options; make drivers select what they need 2012-11-26 17:10:44 -05:00
ethernet
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ieee802154 6lowpan: consider checksum bytes in fragmentation threshold 2012-11-30 12:19:24 -05:00
ipv4 tcp: don't abort splice() after small transfers 2012-12-02 20:23:01 -05:00
ipv6 ipv6: unify logic evaluating inet6_dev's accept_ra property 2012-12-01 11:36:37 -05:00
ipx userns: Print out socket uids in a user namespace aware fashion. 2012-08-14 21:48:06 -07:00
irda irda: irttp: fix memory leak in irttp_open_tsap() error path 2012-11-28 11:25:29 -05:00
iucv
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key net: Allow userns root to control llc, netfilter, netlink, packet, and xfrm 2012-11-18 20:32:45 -05:00
l2tp Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-11-10 18:32:51 -05:00
lapb
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llc net: Allow userns root to control llc, netfilter, netlink, packet, and xfrm 2012-11-18 20:32:45 -05:00
mac80211 Merge branch 'for-john' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next 2012-11-26 14:46:41 -05:00
mac802154 mac802154: use kfree_skb() instead of dev_kfree_skb() 2012-11-30 12:19:24 -05:00
netfilter Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/jesse/openvswitch 2012-11-30 12:01:30 -05:00
netlabel Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2012-10-02 13:38:27 -07:00
netlink net: Allow userns root to control llc, netfilter, netlink, packet, and xfrm 2012-11-18 20:32:45 -05:00
netrom net: change return values from -EACCES to -EPERM 2012-09-21 13:58:08 -04:00
nfc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-11-25 12:49:17 -05:00
openvswitch openvswitch: Use RCU callback when detaching netdevices. 2012-11-28 14:04:34 -08:00
packet net: Allow userns root to control llc, netfilter, netlink, packet, and xfrm 2012-11-18 20:32:45 -05:00
phonet net: Push capable(CAP_NET_ADMIN) into the rtnl methods 2012-11-18 20:32:44 -05:00
rds net: rds: use this_cpu_* per-cpu helper 2012-11-19 18:59:44 -05:00
rfkill Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2012-10-02 13:38:27 -07:00
rose
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rxrpc Merge branch 'modules-next' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux 2012-10-14 13:39:34 -07:00
sched pkt_sched: QFQ Plus: fair-queueing service at DRR cost 2012-11-28 11:19:35 -05:00
sctp sctp: verify length provided in heartbeat information parameter 2012-11-30 12:25:52 -05:00
sunrpc SUNRPC: return proper errno from backchannel_rqst 2012-11-01 11:50:53 -04:00
tipc tipc: delete TIPC_ADVANCED Kconfig variable 2012-11-22 14:33:29 -05:00
unix net: Don't export sysctls to unprivileged users 2012-11-18 20:30:55 -05:00
wanrouter wanmain: comparing array with NULL 2012-07-24 13:55:21 -07:00
wimax
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wireless Merge branch 'for-john' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next 2012-11-26 14:46:41 -05:00
x25
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xfrm Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next 2012-11-22 15:25:55 -05:00
Kconfig net: Add INET dependency on aes crypto for the sake of TCP fastopen. 2012-09-04 14:20:14 -04:00
Makefile ipv6: Preserve ipv6 functionality needed by NET 2012-11-18 02:34:00 -05:00
compat.c make get_file() return its argument 2012-09-26 21:10:25 -04:00
nonet.c
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socket.c cgroup: net_cls: Rework update socket logic 2012-10-26 03:40:51 -04:00
sysctl_net.c user_ns: get rid of duplicate code in net_ctl_permissions 2012-11-18 20:32:45 -05:00