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Eric Dumazet c564039fd8 net: sk_wmem_alloc has initial value of one, not zero 
commit 2b85a34e91
(net: No more expensive sock_hold()/sock_put() on each tx)
changed initial sk_wmem_alloc value.

Some protocols check sk_wmem_alloc value to determine if a timer
must delay socket deallocation. We must take care of the sk_wmem_alloc
value being one instead of zero when no write allocations are pending.

Reported by Ingo Molnar, and full diagnostic from David Miller.

This patch introduces three helpers to get read/write allocations
and a followup patch will use these helpers to report correct
write allocations to user.

Reported-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 		2009-06-17 04:31:25 -07:00
..
9p virtio: find_vqs/del_vqs virtio operations 2009-06-12 22:16:36 +09:30
802 net: remove COMPAT_NET_DEV_OPS 2009-05-25 01:53:53 -07:00
8021q 8021q: Vlan driver should use rcu_barrier() on unload instead of syncronize_net() 2009-06-10 01:11:22 -07:00
appletalk net: sk_wmem_alloc has initial value of one, not zero 2009-06-17 04:31:25 -07:00
atm net: fix network drivers ndo_start_xmit() return values (part 7) 2009-06-13 01:18:43 -07:00
ax25 net: sk_wmem_alloc has initial value of one, not zero 2009-06-17 04:31:25 -07:00
bluetooth Bluetooth: Fix Kconfig issue with RFKILL integration 2009-06-14 15:30:51 +02:00
bridge bridge: Simplify interface for ATM LANE 2009-06-11 21:03:21 -07:00
can can: af_can.c use rcu_barrier() on module unload. 2009-06-10 01:11:24 -07:00
core Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 2009-06-15 03:02:23 -07:00
dcb DCB: fix kfree(skb) 2009-01-04 17:29:21 -08:00
dccp net: skb->dst accessors 2009-06-03 02:51:04 -07:00
decnet net: skb->dst accessors 2009-06-03 02:51:04 -07:00
dsa net: convert unicast addr list 2009-05-29 22:12:32 -07:00
econet net: sk_wmem_alloc has initial value of one, not zero 2009-06-17 04:31:25 -07:00
ethernet net: remove COMPAT_NET_DEV_OPS 2009-05-25 01:53:53 -07:00
ieee802154 ieee802154: Use '%Zu' printf format for size_t. 2009-06-11 02:10:19 -07:00
ipv4 ipv4: Fix fib_trie rebalancing 2009-06-15 02:31:29 -07:00
ipv6 Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 2009-06-15 03:02:23 -07:00
ipx ipx: use constant for strings and desciptor 2009-03-21 19:06:51 -07:00
irda irda: Use SKB queue and list helpers instead of doing it by-hand. 2009-05-28 23:26:33 -07:00
iucv af_iucv: Fix merge. 2009-04-23 06:37:16 -07:00
key af_key: remove some pointless conditionals before kfree_skb() 2009-02-26 23:07:32 -08:00
lapb
…
llc llc: Kill outdated and incorrect comment. 2009-05-28 23:31:56 -07:00
mac80211 mac80211: fix wext bssid/ssid setting 2009-06-15 15:05:59 -04:00
netfilter Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 2009-06-15 03:02:23 -07:00
netlabel netlabel: Use genl_register_family_with_ops() 2009-05-21 16:50:24 -07:00
netlink genetlink: Introduce genl_register_family_with_ops() 2009-05-21 16:50:22 -07:00
netrom net: sk_wmem_alloc has initial value of one, not zero 2009-06-17 04:31:25 -07:00
packet net: skb->dst accessors 2009-06-03 02:51:04 -07:00
phonet phonet: Use frag list abstraction interfaces. 2009-06-09 00:24:06 -07:00
rds Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2009-05-18 21:08:20 -07:00
rfkill rfkill: don't impose global states on resume (just restore the previous states) 2009-06-10 13:28:37 -04:00
rose net: sk_wmem_alloc has initial value of one, not zero 2009-06-17 04:31:25 -07:00
rxrpc RxRPC: Error handling for rxrpc_alloc_connection() 2009-05-21 15:22:02 -07:00
sched Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 2009-06-15 03:02:23 -07:00
sctp sctp: protocol.c call rcu_barrier() on unload. 2009-06-10 01:11:25 -07:00
sunrpc Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 2009-06-15 03:02:23 -07:00
tipc tipc: Use genl_register_family_with_ops() 2009-05-21 16:50:23 -07:00
unix New helper - current_umask() 2009-03-31 23:00:26 -04:00
wanrouter wanrouter: fix sparse warnings: context imbalance 2009-02-26 23:13:36 -08:00
wimax wimax: fix warning caused by not checking retval of rfkill_set_hw_state() 2009-06-11 11:12:48 -07:00
wireless cfg80211: fix rfkill locking problem 2009-06-10 13:28:41 -04:00
x25 net: sk_wmem_alloc has initial value of one, not zero 2009-06-17 04:31:25 -07:00
xfrm xfrm: Use frag list abstraction interfaces. 2009-06-09 00:24:07 -07:00
Kconfig net: add IEEE 802.15.4 socket family implementation 2009-06-09 05:25:32 -07:00
Makefile net: add IEEE 802.15.4 socket family implementation 2009-06-09 05:25:32 -07:00
TUNABLE
…
compat.c net: socket infrastructure for SO_TIMESTAMPING 2009-02-15 22:43:35 -08:00
nonet.c
…
socket.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2009-04-06 18:05:43 -07:00
sysctl_net.c net: sysctl_net - use net_eq to compare nets 2009-03-16 16:23:30 +01:00