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Eric Dumazet 56138f50d1 iwlwifi: dont pull too much payload in skb head 
As iwlwifi use fat skbs, it should not pull too much data in skb->head,
and particularly no tcp data payload, or splice() is slower, and TCP
coalescing is disabled. Copying payload to userland also involves at
least two copies (part from header, part from fragment)

Each layer will pull its header from the fragment as needed.

(on 64bit arches, skb_tailroom(skb) at this point is 192 bytes)

With this patch applied, I have a major reduction of collapsed/pruned
TCP packets, a nice increase of TCPRcvCoalesce counter, and overall
better Internet User experience.

Small packets are still using a fragless skb, so that page can be reused
by the driver.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Johannes Berg <johannes.berg@intel.com>
Cc: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-18 13:31:25 -04:00
..
accessibility
acpi Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux 2012-05-05 10:06:06 -07:00
amba
ata Change summary: 2012-05-03 17:16:52 -07:00
atm skb: Add inline helper for getting the skb end offset from head 2012-05-06 13:13:19 -04:00
auxdisplay
base regmap: fix possible memory corruption in regmap_bulk_read() 2012-05-09 15:44:11 +01:00
bcma
block Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-05-16 22:17:37 -04:00
bluetooth Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth 2012-04-27 15:16:43 -04:00
cdrom
char
clk
clocksource
connector
cpufreq
cpuidle
crypto
dca
devfreq
dio
dma Merge branch 'fixes' of git://git.infradead.org/users/vkoul/slave-dma 2012-04-26 15:33:36 -07:00
edac
eisa
firewire
firmware efivars: Improve variable validation 2012-05-03 17:19:19 -07:00
gpio gpio/exynos: Fix compiler warnings when non-exynos machines are selected 2012-05-11 18:25:53 -06:00
gpu drm/nouveau/i2c: resume use of i2c-algo-bit, rather than custom stack 2012-05-07 11:02:38 +01:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 2012-04-20 10:39:33 -07:00
hsi HSI: hsi_char: Remove max_data_size from sysfs 2012-04-23 14:23:32 +03:00
hv
hwmon hwmon: (coretemp) Increase CPU core limit 2012-05-01 09:16:14 -07:00
hwspinlock
i2c i2c: mxs: disable QUEUE when sending is done 2012-04-27 16:13:29 +02:00
ide
idle
ieee802154 drivers/ieee802154: IEEE 802.15.4 loopback driver 2012-05-16 15:17:08 -04:00
infiniband Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-05-07 23:35:40 -04:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2012-04-30 10:13:48 -07:00
iommu
isdn isdn: remove duplicate NULL check 2012-05-17 04:47:50 -04:00
leds drivers/leds: correct __devexit annotations 2012-05-10 15:06:44 -07:00
lguest
macintosh
mca
md Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-05-12 12:57:01 -07:00
media Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media 2012-05-14 11:23:37 -07:00
memstick
message tokenring: delete all remaining driver support 2012-05-15 20:23:16 -04:00
mfd mfd: Fix build breakage in omap-usb-host.c 2012-05-01 11:55:04 +02:00
misc
mmc Merge branch 'fixes' of git://git.infradead.org/users/vkoul/slave-dma 2012-04-26 15:33:36 -07:00
mtd Three fixes for 3.4: 2012-05-13 11:33:09 -07:00
net iwlwifi: dont pull too much payload in skb head 2012-05-18 13:31:25 -04:00
nfc
nubus
of netdev/of/phy: New function: of_mdio_find_bus(). 2012-05-07 22:58:09 -04:00
oprofile
parisc parisc: move definition of PAGE0 to asm/page.h 2012-05-10 15:12:08 -07:00
parport
pci Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-05-16 22:17:37 -04:00
pcmcia
pinctrl
platform Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2012-05-06 12:19:38 -07:00
pnp
power
pps
ps3
ptp Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-05-16 22:17:37 -04:00
rapidio
regulator regulator: Actually free the regulator in devm_regulator_put() 2012-05-07 13:14:44 +01:00
remoteproc remoteproc: fix off-by-one bug in __rproc_free_vrings 2012-05-13 23:15:42 +03:00
rpmsg
rtc Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2012-05-04 15:35:09 -07:00
s390 qeth: recognize vlan devices in layer3 mode 2012-05-16 15:32:50 -04:00
sbus
scsi Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-05-16 22:17:37 -04:00
sfi
sh
sn
spi spi/spi-bfin5xx: Fix flush of last bit after each spi transfer 2012-04-27 12:20:39 -06:00
ssb
staging Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-05-07 23:35:40 -04:00
target target: Drop incorrect se_lun_acl release for dynamic -> explict ACL conversion 2012-05-11 14:55:19 -07:00
tc
thermal
tty tty: Fix LED error return 2012-05-14 10:43:24 -07:00
uio
usb usb/net: rndis: fixup a few name prefixes 2012-05-12 15:13:39 -04:00
uwb uwb: fix error handling 2012-04-18 13:15:51 -07:00
vhost Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-05-16 22:17:37 -04:00
video Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-05-12 12:57:01 -07:00
virt
virtio
vlynq
w1
watchdog hpwdt: Only BYTE reads/writes to WD Timer port 0x72 2012-04-26 14:38:07 +02:00
xen xen/Kconfig: fix Kconfig layout 2012-05-07 12:26:28 -04:00
zorro
Kconfig
Makefile