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73852e8151
linux/net
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Steven J. Magnani 73852e8151 NET_DMA: free skbs periodically 
Under NET_DMA, data transfer can grind to a halt when userland issues a
large read on a socket with a high RCVLOWAT (i.e., 512 KB for both).
This appears to be because the NET_DMA design queues up lots of memcpy
operations, but doesn't issue or wait for them (and thus free the
associated skbs) until it is time for tcp_recvmesg() to return.
The socket hangs when its TCP window goes to zero before enough data is
available to satisfy the read.

Periodically issue asynchronous memcpy operations, and free skbs for ones
that have completed, to prevent sockets from going into zero-window mode.

Signed-off-by: Steven J. Magnani <steve@digidescorp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-03-20 14:29:02 -07:00
..
9p 9p: Change the name of new protocol from 9p2010.L to 9p2000.L 2010-03-13 08:57:29 -06:00
802 sysctl net: Remove unused binary sysctl code 2009-11-12 02:05:06 -08:00
8021q net: Potential null skb->dev dereference 2010-03-18 21:16:45 -07:00
appletalk net: appletalk: use seq_hlist_foo() helpers 2010-02-10 11:12:09 -08:00
atm net: atm: use seq_list_foo() helpers 2010-02-10 12:31:10 -08:00
ax25 net: ax25: use seq_hlist_foo() helpers 2010-02-10 11:12:09 -08:00
bluetooth Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2010-03-13 14:50:18 -08:00
bridge bridge: Make first arg to deliver_clone const. 2010-03-16 14:37:47 -07:00
can can: deny filterlist access on non-CAN interfaces 2010-02-02 07:21:34 -08:00
core net: Potential null skb->dev dereference 2010-03-18 21:16:45 -07:00
dcb const: struct nla_policy 2010-02-18 14:30:18 -08:00
dccp net-2.6 [Bug-Fix][dccp]: fix oops caused after failed initialisation 2010-03-15 16:00:50 -07:00
decnet net: Add checking to rcu_dereference() primitives 2010-02-25 09:41:03 +01:00
dsa
econet net: use net_eq to compare nets 2009-11-25 15:14:13 -08:00
ethernet llc: use dev_hard_header 2009-12-26 20:38:23 -08:00
ieee802154 net: use net_eq to compare nets 2009-11-25 15:14:13 -08:00
ipv4 NET_DMA: free skbs periodically 2010-03-20 14:29:02 -07:00
ipv6 net: ipmr/ip6mr: fix potential out-of-bounds vif_table access 2010-03-19 22:47:22 -07:00
ipx net: ipx: use seq_list_foo() helpers 2010-02-10 12:31:10 -08:00
irda const: struct nla_policy 2010-02-18 14:30:18 -08:00
iucv const: constify remaining dev_pm_ops 2009-12-15 08:53:25 -08:00
key xfrm: SP lookups signature with mark 2010-02-22 16:21:12 -08:00
lapb
llc net: backlog functions rename 2010-03-05 13:34:03 -08:00
mac80211 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2010-03-13 14:50:18 -08:00
netfilter Merge branch 'for-next' into for-linus 2010-03-08 16:55:37 +01:00
netlabel net: remove INIT_RCU_HEAD() usage 2010-02-17 00:03:27 -08:00
netlink netlink: Adding inode field to /proc/net/netlink 2010-02-28 01:29:49 -08:00
netrom net: netrom: use seq_hlist_foo() helpers 2010-02-10 11:12:08 -08:00
packet af_packet: move strict addr_len check right before dev_[mc/unicast]_[add/del] 2010-03-03 01:04:38 -08:00
phonet phonet: use for_each_set_bit() 2010-03-15 16:00:47 -07:00
rds net/rds: remove uses of NIPQUAD, use %pI4 2010-02-03 20:16:48 -08:00
rfkill rfkill: Add support for KEY_RFKILL 2010-03-02 14:28:49 -05:00
rose net: rose: use seq_hlist_foo() helpers 2010-02-10 11:12:08 -08:00
rxrpc net: use net_eq to compare nets 2009-11-25 15:14:13 -08:00
sched Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-02-09 11:44:44 -08:00
sctp Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2010-03-13 14:50:18 -08:00
sunrpc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2010-03-13 14:50:18 -08:00
tipc tipc: fix lockdep warning on address assignment 2010-03-16 14:15:45 -07:00
unix AF_UNIX: update locking comment 2010-02-18 14:12:06 -08:00
wanrouter
wimax const: struct nla_policy 2010-02-18 14:30:18 -08:00
wireless Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6 2010-02-25 23:26:21 -08:00
x25 net: backlog functions rename 2010-03-05 13:34:03 -08:00
xfrm ipsec: Fix bogus bundle flowi 2010-03-03 01:04:37 -08:00
compat.c net: use compat helper functions in compat_sys_recvmmsg 2009-12-11 15:07:57 -08:00
Kconfig
Makefile
nonet.c
socket.c fs: no games with DCACHE_UNHASHED 2009-12-17 10:51:40 -05:00
sysctl_net.c net: spread __net_init, __net_exit 2010-01-17 19:16:02 -08:00
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