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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 vt:tackle kbd_table 2012-03-08 10:50:35 -08:00
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 ARM: 7366/3: amba: Remove AMBA level regulator support 2012-04-13 14:04:08 +01:00
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 Fix common misspellings 2011-03-31 11:26:23 -03:00
base regmap: fix possible memory corruption in regmap_bulk_read() 2012-05-09 15:44:11 +01:00
bcma bcma: use fallback sprom if no on chip sprom is available 2012-04-16 13:32:01 -04:00
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 powerpc: Remove some of the legacy iSeries specific device drivers 2012-03-16 09:28:05 +11:00
char tty and serial fixes for 3.4-rc2 2012-04-12 15:36:33 -07:00
clk clk: make CONFIG_COMMON_CLK invisible 2012-03-19 09:37:11 +00:00
clocksource Revert "clocksource: Load the ACPI PM clocksource asynchronously" 2012-04-12 00:05:05 +02:00
connector connector: add comm change event report to proc connector 2011-09-28 13:41:50 -04:00
cpufreq cpufreq: OMAP: fix build errors: depends on ARCH_OMAP2PLUS 2012-04-13 17:57:40 -07:00
cpuidle Merge branches 'idle-fix' and 'misc' into release 2012-04-06 21:48:59 -04:00
crypto crypto: talitos - properly lock access to global talitos registers 2012-04-09 15:13:40 +08:00
dca drivers/dca: Add export.h for THIS_MODULE to dca-sysfs.c 2011-10-31 19:31:43 -04:00
devfreq ARM: global cleanups 2012-03-27 16:03:32 -07:00
dio m68k: don't export static inline functions 2009-12-06 11:18:28 +01:00
dma Merge branch 'fixes' of git://git.infradead.org/users/vkoul/slave-dma 2012-04-26 15:33:36 -07:00
edac Merge branch 'stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile 2012-04-06 17:56:20 -07:00
eisa eisa/pci_eisa.c: fix BUG introduced by 005bdad7b8 2011-08-04 06:32:51 -10:00
firewire Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
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 net/hyperv: Add flow control based on hi/low watermark 2012-04-03 17:47:15 -04:00
hwmon hwmon: (coretemp) Increase CPU core limit 2012-05-01 09:16:14 -07:00
hwspinlock Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux 2011-11-08 18:34:16 -08:00
i2c i2c: mxs: disable QUEUE when sending is done 2012-04-27 16:13:29 +02:00
ide Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
idle simple_open: automatically convert to simple_open() 2012-04-05 15:25:50 -07:00
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 Merge branch 'akpm' (Andrew's patch-bomb) 2012-04-05 15:30:34 -07:00
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 lguest: Make sure interrupt is allocated ok by lguest_setup_irq 2012-01-12 15:44:47 +10:30
macintosh Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
mca mca: struct device - replace bus_id with dev_name(), dev_set_name() 2009-03-24 16:38:23 -07:00
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 memstick: remove the second argument of k[un]map_atomic() 2012-03-20 21:48:19 +08:00
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 Merge branch 'akpm' (Andrew's patch-bomb) 2012-04-05 15:30:34 -07:00
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 NFC: pn533 Rx chaining support 2012-04-12 15:10:44 -04:00
nubus Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
of netdev/of/phy: New function: of_mdio_find_bus(). 2012-05-07 22:58:09 -04:00
oprofile simple_open: automatically convert to simple_open() 2012-04-05 15:25:50 -07:00
parisc parisc: move definition of PAGE0 to asm/page.h 2012-05-10 15:12:08 -07:00
parport Autogenerated GPG tag for Rusty D1ADB8F1: 15EE 8D6C AB0E 7F0C F999 BFCB D920 0E6C D1AD B8F1 2012-01-14 12:32:16 -08:00
pci Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-05-16 22:17:37 -04:00
pcmcia Merge git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia 2012-03-29 16:00:48 -07:00
pinctrl pinctrl: implement pinctrl_check_ops 2012-04-11 09:31:02 +02:00
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 Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux 2012-03-30 16:45:39 -07:00
power Various small bugfixes and enhancements, plus two new drivers: 2012-03-30 16:09:02 -07:00
pps pps: class_create() returns an ERR_PTR, not NULL 2012-03-05 15:49:43 -08:00
ps3 powerpc/ps3: irq: Remove IRQF_DISABLED 2011-11-08 14:51:46 +11:00
ptp Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-05-16 22:17:37 -04:00
rapidio rapidio/tsi721: fix bug in register offset definitions 2012-03-15 17:03:03 -07:00
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 rpmsg: fix build warning when dma_addr_t is 64-bit 2012-03-04 13:43:41 +02:00
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 Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
scsi Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-05-16 22:17:37 -04:00
sfi drivers/sfi: sfi_acpi.c needs sysfs.h 2011-10-31 19:31:57 -04:00
sh SuperH updates for 3.4 merge window 2012-03-30 00:09:17 -07:00
sn include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
spi spi/spi-bfin5xx: Fix flush of last bit after each spi transfer 2012-04-27 12:20:39 -06:00
ssb Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2012-03-20 21:04:47 -07:00
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 include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
thermal thermal: Fix for setting the thermal zone mode to enable/disable 2012-03-22 01:10:18 -04:00
tty tty: Fix LED error return 2012-05-14 10:43:24 -07:00
uio Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci 2012-01-11 18:50:26 -08:00
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 drivers/virt: add ioctl for 32-bit compat on 64-bit to fsl-hv-manager 2011-10-14 02:56:02 -05:00
virtio virtio_balloon: fix handling of PAGE_SIZE != 4k 2012-04-15 11:51:06 +03:00
vlynq vlynq: Convert irq functions 2011-03-28 19:33:04 +02:00
w1 DS2781 Maxim Stand-Alone Fuel Gauge battery and w1 slave drivers 2012-03-08 11:15:33 -08:00
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 misc latin1 to utf8 conversions 2012-01-02 13:04:55 +01:00
Kconfig Merge branch 'for-next' of git://gitorious.org/kernel-hsi/kernel-hsi 2012-04-02 09:50:40 -07:00
Makefile Merge branch 'for-next' of git://gitorious.org/kernel-hsi/kernel-hsi 2012-04-02 09:50:40 -07:00