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eb6a24816b
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Eric Dumazet eb6a24816b af_unix: reduce high order page allocations 
unix_dgram_sendmsg() currently builds linear skbs, and this can stress
page allocator with high order page allocations. When memory gets
fragmented, this can eventually fail.

We can try to use order-2 allocations for skb head (SKB_MAX_ALLOC) plus
up to 16 page fragments to lower pressure on buddy allocator.

This patch has no effect on messages of less than 16064 bytes.
(on 64bit arches with PAGE_SIZE=4096)

For bigger messages (from 16065 to 81600 bytes), this patch brings
reliability at the expense of performance penalty because of extra pages
allocations.

netperf -t DG_STREAM -T 0,2 -- -m 16064 -s 200000
->4086040 Messages / 10s

netperf -t DG_STREAM -T 0,2 -- -m 16068 -s 200000
->3901747 Messages / 10s

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-04-03 16:43:18 -04:00
..
9p virtio: rename virtqueue_add_buf_gfp to virtqueue_add_buf 2012-01-12 15:44:42 +10:30
802 net/garp: avoid infinite loop if attribute already exists 2012-04-01 16:47:11 -04:00
8021q vlan: Stop using NLA_PUT*(). 2012-04-02 04:33:44 -04:00
appletalk net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
atm ppp: Replace uses of <linux/if_ppp.h> with <linux/ppp-ioctl.h> 2012-03-04 20:41:38 -05:00
ax25 ax25: avoid overflows in ax25_setsockopt() 2011-12-28 14:08:08 -05:00
batman-adv Merge tag 'batman-adv-for-davem' of git://git.open-mesh.org/linux-merge 2012-03-11 15:36:34 -07:00
bluetooth Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2012-03-20 21:04:47 -07:00
bridge bridge: Stop using NLA_PUT*(). 2012-04-02 04:33:44 -04:00
caif caif: Stop using NLA_PUT*(). 2012-04-02 04:33:44 -04:00
can
ceph Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client 2012-02-02 15:47:33 -08:00
core net: Report dev->promiscuity in netlink reports. 2012-04-02 04:33:46 -04:00
dcb dcbnl: Stop using NLA_PUT*(). 2012-04-02 04:33:41 -04:00
dccp dccp: fix bug in sequence number validation during connection setup 2012-03-03 09:02:52 -07:00
decnet decnet: Stop using NLA_PUT*(). 2012-04-02 04:33:42 -04:00
dns_resolver KEYS: Allow special keyrings to be cleared 2012-01-19 14:38:51 +11:00
dsa dsa: Move switch drivers to new directory drivers/net/dsa 2011-11-29 00:21:36 -05:00
econet net: Remove all uses of LL_ALLOCATED_SPACE 2011-11-18 14:37:09 -05:00
ethernet eth: reset addr_assign_type if eth_mac_addr() called 2012-02-13 00:46:41 -05:00
ieee802154 ieee802154: Stop using NLA_PUT*(). 2012-04-02 04:33:43 -04:00
ipv4 netfilter: ipv4: Stop using NLA_PUT*(). 2012-04-02 04:33:43 -04:00
ipv6 net/ipv6/addrconf.c: Checkpatch cleanups 2012-04-02 04:33:46 -04:00
ipx net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
irda Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2012-03-20 21:04:47 -07:00
iucv Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2012-03-22 18:15:32 -07:00
key net: use IS_ENABLED(CONFIG_IPV6) 2011-12-11 18:25:16 -05:00
l2tp l2tp: Stop using NLA_PUT*(). 2012-04-02 04:33:41 -04:00
lapb
llc llc: Fix race condition in llc_ui_recvmsg 2012-01-24 15:33:19 -05:00
mac80211 mac80211: fix oper channel timestamp updation 2012-03-28 14:25:37 -04:00
netfilter ipset: Stop using NLA_PUT*(). 2012-04-02 04:33:41 -04:00
netlabel netlabel: use GFP flags from caller instead of GFP_ATOMIC 2012-03-22 19:29:57 -04:00
netlink genetlink: Stop using NLA_PUT*(). 2012-04-01 18:43:25 -04:00
netrom netrom: avoid overflows in nr_setsockopt() 2011-12-28 14:08:08 -05:00
nfc nfc: Stop using NLA_PUT*(). 2012-04-01 18:11:37 -04:00
openvswitch openvswitch: Stop using NLA_PUT*(). 2012-04-01 18:11:37 -04:00
packet net: Add framework to allow sending packets with customized CRC. 2012-02-24 01:37:35 -08:00
phonet phonet: Stop using NLA_PUT*(). 2012-04-01 18:11:37 -04:00
rds RDS: use gfp flags from caller in conn_alloc() 2012-03-22 19:29:58 -04:00
rfkill device.h: cleanup users outside of linux/include (C files) 2012-03-11 14:27:37 -04:00
rose rose_dev: fix memcpy-bug in rose_set_mac_address 2012-04-01 16:47:12 -04:00
rxrpc RxRPC: Fix kcalloc parameters swapped 2012-02-14 14:41:55 -05:00
sched pkt_sched: Stop using NLA_PUT*(). 2012-04-01 18:11:37 -04:00
sctp sctp: Export sctp_do_peeloff 2012-03-08 13:52:08 -08:00
sunrpc NFS client updates for Linux 3.4 2012-03-23 08:53:47 -07:00
tipc tipc: Optimize setting of immutable payload message header fields 2012-02-29 11:45:35 -05:00
unix af_unix: reduce high order page allocations 2012-04-03 16:43:18 -04:00
wanrouter wanrouter: Remove kernel_lock annotations 2011-11-07 13:27:30 -05:00
wimax net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
wireless wireless: Stop using NLA_PUT*(). 2012-04-01 18:11:37 -04:00
x25 net:x25: use IS_ENABLED 2011-12-16 15:49:52 -05:00
xfrm xfrm_user: Stop using NLA_PUT*(). 2012-04-01 18:11:36 -04:00
compat.c net: get rid of some pointless casts to sockaddr 2012-03-11 19:11:22 -07:00
Kconfig net: Add Open vSwitch kernel components. 2011-12-03 09:35:17 -08:00
Makefile net: Add Open vSwitch kernel components. 2011-12-03 09:35:17 -08:00
nonet.c
socket.c net: get rid of some pointless casts to sockaddr 2012-03-11 19:11:22 -07:00
sysctl_net.c sysctl: Modify __register_sysctl_paths to take a set instead of a root and an nsproxy 2012-01-24 16:40:30 -08:00