Zoltan Kiss bdab82759b xen-netback: Grant copy the header instead of map and memcpy ... An old inefficiency of the TX path that we are grant mapping the first slot, and then copy the header part to the linear area. Instead, doing a grant copy for that header straight on is more reasonable. Especially because there are ongoing efforts to make Xen avoiding TLB flush after unmap when the page were not touched in Dom0. In the original way the memcpy ruined that. The key changes: - the vif has a tx_copy_ops array again - xenvif_tx_build_gops sets up the grant copy operations - we don't have to figure out whether the header and first frag are on the same grant mapped page or not Note, we only grant copy PKT_PROT_LEN bytes from the first slot, the rest (if any) will be on the first frag, which is grant mapped. If the first slot is smaller than PKT_PROT_LEN, then we grant copy that, and later __pskb_pull_tail will pull more from the frags (if any) Signed-off-by: Zoltan Kiss <zoltan.kiss@citrix.com> Reviewed-by: Paul Durrant <paul.durrant@citrix.com> Acked-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2014-04-03 14:22:40 -04:00
..
accessibility
acpi	More ACPI and power management updates for 3.15-rc1	2014-04-02 14:10:21 -07:00
amba
ata	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2014-04-02 16:23:38 -07:00
atm	atm: idt77105: Use del_timer_sync() in exit path	2014-03-25 21:06:02 -04:00
auxdisplay
base	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2014-04-02 16:23:38 -07:00
bcma	bcma: gpio: register 32 GPIOs on BCM5357	2014-03-27 14:20:04 -04:00
block	Nothing exciting: virtio-blk users might see a bit of a boost from the	2014-04-02 14:43:17 -07:00
bluetooth	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2014-04-02 20:53:45 -07:00
bus
cdrom
char	Nothing exciting: virtio-blk users might see a bit of a boost from the	2014-04-02 14:43:17 -07:00
clk
clocksource	Merge branch 'x86-nuke-platforms-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2014-04-02 13:15:58 -07:00
connector	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2014-04-02 20:53:45 -07:00
cpufreq	More ACPI and power management updates for 3.15-rc1	2014-04-02 14:10:21 -07:00
cpuidle	Merge branch 'sched-idle-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2014-04-02 16:22:27 -07:00
crypto
dca
devfreq	PM / devfreq: Rewrite devfreq_update_status() to fix multiple bugs	2014-03-21 11:16:30 +09:00
dio
dma
edac	Merge branch 'mips-for-linux-next' of git://git.linux-mips.org/pub/scm/ralf/upstream-sfr	2014-04-02 13:40:50 -07:00
eisa
extcon	extcon: Move OF helper function to extcon core and change function name	2014-03-19 14:41:58 +09:00
firewire
firmware	Driver core / sysfs patches for 3.15-rc1	2014-04-01 16:28:19 -07:00
fmc
gpio	MIPS: VR41xx: Mark GPIO lines used for IRQ	2014-03-31 18:17:12 +02:00
gpu	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2014-04-02 16:23:38 -07:00
hid	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid	2014-04-02 16:24:28 -07:00
hsi
hv	Char/Misc driver patches for 3.15-rc1	2014-04-01 16:13:21 -07:00
hwmon	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc	2014-04-02 13:42:59 -07:00
hwspinlock
i2c	i2c: cpm: Fix build by adding of_address.h and of_irq.h	2014-03-24 14:54:21 +01:00
ide
idle
iio	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid	2014-04-02 16:24:28 -07:00
infiniband	RDMA/cxgb4: set error code on kmalloc() failure	2014-03-28 14:55:21 -04:00
input	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2014-04-02 16:23:38 -07:00
iommu	Merge branch 'for-3.15' of git://git.linaro.org/people/mszyprowski/linux-dma-mapping	2014-04-02 14:34:25 -07:00
ipack
irqchip	irqchip: sun7i/sun6i: Disable NMI before registering the handler	2014-03-31 11:12:57 +02:00
isdn	isdnloop: Validate NUL-terminated strings from user.	2014-04-03 11:26:24 -04:00
leds
lguest
macintosh
mailbox
mcb
md	Merge branch 'for-3.15/drivers' of git://git.kernel.dk/linux-block	2014-04-01 19:43:53 -07:00
media	Merge branch 'x86-x32-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2014-04-02 12:51:41 -07:00
memory
memstick
message	PCI changes for the v3.15 merge window:	2014-04-01 15:14:04 -07:00
mfd	regulator: Updates for v3.15	2014-04-01 13:17:46 -07:00
misc	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2014-04-02 16:23:38 -07:00
mmc	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2014-04-02 16:23:38 -07:00
mtd	Char/Misc driver patches for 3.15-rc1	2014-04-01 16:13:21 -07:00
net	xen-netback: Grant copy the header instead of map and memcpy	2014-04-03 14:22:40 -04:00
nfc
ntb
nubus
of	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2014-04-02 20:53:45 -07:00
oprofile
parisc
parport
pci	Merge branch 'x86-nuke-platforms-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2014-04-02 13:15:58 -07:00
pcmcia	PCI changes for the v3.15 merge window:	2014-04-01 15:14:04 -07:00
phy
pinctrl	Pin control bulk changes for the v3.15 series, no new core	2014-04-01 13:10:49 -07:00
platform	sound updates for 3.15-rc1	2014-04-01 15:38:47 -07:00
pnp	More ACPI and power management updates for 3.15-rc1	2014-04-02 14:10:21 -07:00
power
powercap
pps
ps3
ptp	net: ptp: move PTP classifier in its own file	2014-04-01 16:43:18 -04:00
pwm
rapidio
regulator	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2014-04-02 16:23:38 -07:00
remoteproc
reset
rpmsg
rtc
s390	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2014-04-02 20:53:45 -07:00
sbus
scsi	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2014-04-02 16:23:38 -07:00
sfi
sh
sn
spi	Merge branch 'mips-for-linux-next' of git://git.linux-mips.org/pub/scm/ralf/upstream-sfr	2014-04-02 13:40:50 -07:00
spmi
ssb
staging	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2014-04-02 20:53:45 -07:00
target
tc
thermal
tty	TTY/Serial driver update for 3.15-rc1	2014-04-01 16:55:57 -07:00
uio
usb	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2014-04-02 16:23:38 -07:00
uwb
vfio	PCI changes for the v3.15 merge window:	2014-04-01 15:14:04 -07:00
vhost	vhost: validate vhost_get_vq_desc return value	2014-03-28 16:10:35 -04:00
video	Merge branch 'x86-nuke-platforms-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2014-04-02 13:15:58 -07:00
virt
virtio
vlynq
vme
w1
watchdog	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc	2014-04-02 13:42:59 -07:00
xen	ACPI and power management updates for 3.15-rc1	2014-04-01 12:48:54 -07:00
zorro
Kconfig
Makefile