Michael S. Tsirkin bab632d69e vhost: vhost TX zero-copy support ... >From: Shirley Ma <mashirle@us.ibm.com> This adds experimental zero copy support in vhost-net, disabled by default. To enable, set experimental_zcopytx module option to 1. This patch maintains the outstanding userspace buffers in the sequence it is delivered to vhost. The outstanding userspace buffers will be marked as done once the lower device buffers DMA has finished. This is monitored through last reference of kfree_skb callback. Two buffer indices are used for this purpose. The vhost-net device passes the userspace buffers info to lower device skb through message control. DMA done status check and guest notification are handled by handle_tx: in the worst case is all buffers in the vq are in pending/done status, so we need to notify guest to release DMA done buffers first before we get any new buffers from the vq. One known problem is that if the guest stops submitting buffers, buffers might never get used until some further action, e.g. device reset. This does not seem to affect linux guests. Signed-off-by: Shirley <xma@us.ibm.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2011-07-18 10:42:32 -07:00
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accessibility	…
acpi	…
amba	…
ata	ahci: change 'masking port_map' printk to KERN_WARNING level	2011-06-29 10:10:07 -07:00
atm	lanai: use pci_dev->subsystem_device	2011-07-12 07:59:38 -07:00
auxdisplay	…
base	mm: Move definition of MIN_MEMORY_BLOCK_SIZE to a header	2011-07-12 11:08:01 +10:00
bcma	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6 into for-davem	2011-07-15 10:05:24 -04:00
block	Merge branch 'for-3.0-important' of git://git.drbd.org/linux-2.6-drbd into for-linus	2011-06-30 10:10:50 +02:00
bluetooth	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6 into for-davem	2011-07-15 10:05:24 -04:00
cdrom	…
char	agp/intel: Fix typo in G4x_GMCH_SIZE_VT_2M	2011-07-13 07:44:27 +01:00
clk	…
clocksource	…
connector	…
cpufreq	[CPUFREQ] fix cpumask memory leak in acpi-cpufreq on cpu hotplug.	2011-07-10 17:03:04 -04:00
cpuidle	…
crypto	crypto: caam - fix operator precedence in shared descriptor allocation	2011-06-30 07:43:27 +08:00
dca	…
dio	…
dma	net: remove mm.h inclusion from netdevice.h	2011-06-21 19:17:20 -07:00
edac	…
eisa	…
firewire	Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6	2011-07-14 07:56:40 -07:00
firmware	Merge branch 'driver-core-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6	2011-06-28 11:15:36 -07:00
gpio	gpio/langwell_gpio: ack the correct bit for langwell gpio interrupts	2011-07-08 09:32:01 -06:00
gpu	Merge branch 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6	2011-07-13 14:04:26 -07:00
hid	HID: hid-multitouch: add support for a new Lumio dual-touch panel	2011-06-24 13:41:11 +02:00
hwmon	hwmon: (pmbus) Improve auto-detection of temperature status register	2011-07-10 08:54:29 -07:00
hwspinlock	…
i2c	Merge branch 'for-30-rc5/all-i2c' of git://git.fluff.org/bjdooks/linux	2011-07-07 16:29:29 -07:00
ide	…
idle	…
ieee802154	IEEE 802.15.4: do not enable driver debugging by default	2011-06-30 16:18:09 +04:00
infiniband	net: Abstract dst->neighbour accesses behind helpers.	2011-07-17 23:11:35 -07:00
input	input: pmic8xxx-pwrkey: Do not use mfd_get_data()	2011-07-05 10:38:43 +02:00
isdn	net: Push protocol type directly down to header_ops->cache()	2011-07-13 02:29:59 -07:00
leds	drivers/leds/leds-pca9532.c: change driver name to be unique	2011-07-08 21:14:44 -07:00
lguest	…
macintosh	…
mca	…
md	md: avoid endless recovery loop when waiting for fail device to complete.	2011-06-28 16:59:42 +10:00
media	Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6	2011-07-14 07:56:40 -07:00
memstick	…
message	…
mfd	w1: ds1wm: add a reset recovery parameter	2011-07-08 21:14:44 -07:00
misc	Merge branch 'driver-core-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6	2011-06-28 11:15:36 -07:00
mmc	Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6	2011-07-14 07:56:40 -07:00
mtd	Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6	2011-07-05 23:23:37 -07:00
net	net: Abstract dst->neighbour accesses behind helpers.	2011-07-17 23:11:35 -07:00
nfc	NFC: pn533: add NXP pn533 nfc device driver	2011-07-05 15:26:58 -04:00
nubus	…
of	…
oprofile	…
parisc	…
parport	…
pci	PCI: conditional resource-reallocation through kernel parameter pci=realloc	2011-07-08 15:49:20 -07:00
pcmcia	pcmcia: pxa2xx/vpac270: free gpios on exist rather than requesting	2011-07-11 14:26:34 +08:00
platform	hp-wmi: fix use after free	2011-07-11 09:52:35 -04:00
pnp	…
power	…
pps	…
ps3	…
ptp	…
rapidio	…
regulator	regulator: max8997: Fix setting inappropriate value for ramp_delay variable	2011-07-08 19:14:58 +01:00
rtc	drivers/rtc/rtc-ds1307.c: add support for RTC device pt7c4338	2011-06-27 18:00:12 -07:00
s390	net: Abstract dst->neighbour accesses behind helpers.	2011-07-17 23:11:35 -07:00
sbus	…
scsi	net: Abstract dst->neighbour accesses behind helpers.	2011-07-17 23:11:35 -07:00
sfi	…
sh	…
sn	…
spi	spi/s3c64xx: Bug fix for SPI with different FIFO level	2011-07-06 15:03:08 +09:00
ssb	Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6	2011-07-14 07:56:40 -07:00
staging	Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6	2011-07-14 07:56:40 -07:00
target	tcm_fc: Fix conversion spec warning	2011-06-24 00:09:16 +00:00
tc	…
telephony	…
thermal	…
tty	Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6	2011-07-14 07:56:40 -07:00
uio	…
usb	Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6	2011-07-14 07:56:40 -07:00
uwb	…
vhost	vhost: vhost TX zero-copy support	2011-07-18 10:42:32 -07:00
video	vesafb: fix memory leak	2011-07-04 16:02:48 +09:00
virtio	…
vlynq	…
w1	w1: ds1wm: add a reset recovery parameter	2011-07-08 21:14:44 -07:00
watchdog	watchdog: update author email for at32ap700x_wdt	2011-06-28 20:01:25 +00:00
xen	…
zorro	…
Kconfig	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6 into for-davem	2011-07-08 11:03:36 -04:00
Makefile	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6 into for-davem	2011-07-08 11:03:36 -04:00