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1576d98605
linux/drivers
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Jason Wang 1576d98605 tun: switch to use skb array for tx 
We used to queue tx packets in sk_receive_queue, this is less
efficient since it requires spinlocks to synchronize between producer
and consumer.

This patch tries to address this by:

- switch from sk_receive_queue to a skb_array, and resize it when
  tx_queue_len was changed.
- introduce a new proto_ops peek_len which was used for peeking the
  skb length.
- implement a tun version of peek_len for vhost_net to use and convert
  vhost_net to use peek_len if possible.

Pktgen test shows about 15.3% improvement on guest receiving pps for small
buffers:

Before: ~1300000pps
After : ~1500000pps

Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-07-01 05:32:17 -04:00
..
accessibility
acpi Merge branch 'acpica-fixes' 2016-06-24 23:36:20 +02:00
amba ARM: 8566/1: drivers: amba: properly handle devices with power domains 2016-05-05 19:00:40 +01:00
android
ata Merge branch 'for-4.7-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata 2016-06-28 12:11:31 -07:00
atm atm: iphase: off by one in rx_pkt() 2016-05-31 11:52:59 -07:00
auxdisplay
base Driver core fixes for 4.7-rc4 2016-06-18 06:04:01 -10:00
bcma MTD updates for v4.7: 2016-05-24 11:00:20 -07:00
block tree wide: get rid of __GFP_REPEAT for order-0 allocations part I 2016-06-24 17:23:52 -07:00
bluetooth Bluetooth: Add USB ID 13D3:3487 to ath3k 2016-05-13 16:54:59 +02:00
bus Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2016-05-19 10:02:26 -07:00
cdrom
char ipmi: Remove smi_msg from waiting_rcv_msgs list before handle_one_recv_msg() 2016-06-13 08:56:28 -05:00
clk clk: nxp: Select MFD_SYSCON for creg driver 2016-06-01 15:14:06 -07:00
clocksource Small release overall. 2016-05-19 11:27:09 -07:00
connector connector: fix out-of-order cn_proc netlink message delivery 2016-06-28 08:48:33 -04:00
cpufreq cpufreq: pcc-cpufreq: Fix doorbell.access_width 2016-06-23 23:09:51 +02:00
cpuidle cpuidle: Fix cpuidle_state_is_coupled() argument in cpuidle_enter() 2016-05-18 02:48:37 +02:00
crypto crypto: ux500 - memmove the right size 2016-06-13 17:43:05 +08:00
dax /dev/dax, core: file operations and dax-mmap 2016-05-20 22:02:55 -07:00
dca
devfreq PM / devfreq: Send the DEVFREQ_POSTCHANGE notification when target() is failed 2016-06-23 23:15:12 +02:00
dio
dma dmaengine: mv_xor: Fix incorrect offset in dma_map_page() 2016-06-07 12:44:23 +05:30
dma-buf dma-buf: use vma_pages() 2016-05-31 22:17:05 +05:30
edac EDAC, sb_edac: Readd accidentally dropped Broadwell-D support 2016-06-03 17:28:21 +02:00
eisa
extcon extcon: palmas: Fix boot up state of VBUS when using GPIO detection 2016-06-15 17:17:22 +09:00
firewire treewide: replace dev->trans_start update with helper 2016-05-04 14:16:49 -04:00
firmware efi/arm: Fix the format of EFI debug messages 2016-06-03 09:57:36 +02:00
fmc
fpga
gpio Pin control fixes for the v4.7 cycle: 2016-06-29 10:05:44 -07:00
gpu drm/atomic: Make drm_atomic_legacy_backoff reset crtc->acquire_ctx 2016-06-24 11:10:36 +10:00
hid HID: multitouch: enable palm rejection for Windows Precision Touchpad 2016-06-28 13:24:14 +02:00
hsi HSI: omap-ssi: move omap_ssi_port_update_fclk 2016-05-09 22:45:18 +02:00
hv Drivers: hv: balloon: reset host_specified_ha_region 2016-05-01 09:23:14 -07:00
hwmon hwmon: (dell-smm) Cache fan_type() calls and change fan detection 2016-06-23 06:24:23 -07:00
hwspinlock drivers/hwspinlock: use correct radix tree API 2016-05-20 17:58:30 -07:00
hwtracing coresight: Handle build path error 2016-06-16 00:13:06 -07:00
i2c i2c: mux: reg: Provide of_match_table 2016-06-09 22:38:16 +02:00
ide
idle
iio Staging fixes for 4.7-rc4 2016-06-18 06:05:28 -10:00
infiniband Merge branches '4.7-rc-misc', 'hfi1-fixes', 'i40iw-rc-fixes' and 'mellanox-rc-fixes' into k.o/for-4.7-rc 2016-06-23 12:22:33 -04:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2016-06-27 20:34:43 -07:00
iommu iommu/vt-d: Enable QI on all IOMMUs before setting root entry 2016-06-17 11:29:48 +02:00
ipack tty: Replace ASYNC_INITIALIZED bit and update atomically 2016-04-30 09:26:55 -07:00
irqchip irqchip/mips-gic: Fix IRQs in gic_dev_domain 2016-06-14 11:41:57 +02:00
isdn isdn: eicon: fix old-style declarations 2016-06-16 22:06:30 -07:00
leds leds: handle suspend/resume in heartbeat trigger 2016-06-08 11:47:06 +02:00
lguest
lightnvm lightnvm: reserved space calculation incorrect 2016-05-06 12:51:10 -06:00
macintosh powerpc/mm: Abstraction for switch_mmu_context() 2016-05-01 18:33:04 +10:00
mailbox mailbox: Fix devm_ioremap_resource error detection code 2016-05-08 22:44:46 +05:30
mcb mcb: Acquire reference to carrier module in core 2016-06-13 18:49:30 -07:00
md Merge branch 'for-linus' of git://git.kernel.dk/linux-block 2016-05-27 14:28:09 -07:00
media Update my main e-mails at the Kernel tree 2016-06-15 15:35:37 -10:00
memory memory: omap-gpmc: Fix omap gpmc EXTRADELAY timing 2016-06-16 11:43:48 +03:00
memstick drivers/memstick/core/mspro_block: use kmemdup 2016-05-23 17:04:14 -07:00
message SCSI misc on 20160517 2016-05-18 16:38:59 -07:00
mfd remove lots of IS_ERR_VALUE abuses 2016-05-27 15:26:11 -07:00
misc mei: don't use wake_up_interruptible for wr_ctrl 2016-06-10 22:14:24 -07:00
mmc mmc: sunxi: Re-enable eMMC HS-DDR modes on Allwinner A80 2016-06-02 10:40:20 +02:00
mtd ubi: Make recover_peb power cut aware 2016-06-23 00:29:32 +02:00
net tun: switch to use skb array for tx 2016-07-01 05:32:17 -04:00
nfc NFC: pn533: handle interrupted commands in pn533_recv_frame 2016-05-10 00:01:47 +02:00
ntb
nubus
nvdimm DAX error handling for 4.7 2016-05-26 19:34:26 -07:00
nvme NVMe: Only release requested regions 2016-06-09 14:28:28 -06:00
nvmem remove lots of IS_ERR_VALUE abuses 2016-05-27 15:26:11 -07:00
of Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-06-30 05:03:36 -04:00
oprofile
parisc
parport parport: use subsys_initcall 2016-04-30 13:56:46 -07:00
pci PCI: Fix unaligned accesses in VC code 2016-06-20 13:24:20 -05:00
pcmcia powerpc/mm: Use a helper for finding pte bits mapping I/O area 2016-05-01 18:32:32 +10:00
perf arm: pmu: Fix non-devicetree probing 2016-06-15 09:51:35 +01:00
phy Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-06-30 05:03:36 -04:00
pinctrl pinctrl: baytrail: Fix mingled clock pins 2016-06-23 11:05:04 +02:00
platform platform/x86: Drop duplicate dependencies on X86 2016-06-08 13:21:37 -07:00
pnp driver core update for 4.7-rc1 2016-05-20 21:26:15 -07:00
power power_supply: tps65217-charger: Fix NULL deref during property export 2016-06-16 15:54:11 +02:00
powercap Power management material for v4.7-rc1 2016-05-16 19:17:22 -07:00
pps
ps3
ptp ptp: oops in ptp_ioctl() 2016-05-29 22:32:27 -07:00
pwm pwm: atmel-hlcdc: Fix default PWM polarity 2016-06-14 10:51:45 +02:00
rapidio rapidio/mport_cdev: fix uapi type definitions 2016-05-05 17:38:53 -07:00
ras
regulator Merge remote-tracking branches 'regulator/fix/qcom-smd' and 'regulator/fix/tps51632' into regulator-linus 2016-06-13 16:51:57 +01:00
remoteproc remoteproc: Add additional crash reasons 2016-05-12 15:50:19 -07:00
reset
rpmsg rpmsg: add THIS_MODULE to rpmsg_driver in rpmsg core 2016-05-06 11:08:58 -07:00
rtc rtc: tps6586x: rename so module can be autoloaded 2016-05-21 17:07:17 +02:00
s390 s390/qeth: fix indentation in qeth_l3_arp_query 2016-06-16 22:16:13 -07:00
sbus openprom: fix warning 2016-05-20 18:33:37 -07:00
scsi Merge remote-tracking branch 'mkp-scsi/4.7/scsi-fixes' into fixes 2016-06-18 11:59:01 -07:00
sfi
sh
sn
soc fsl/qe: Add QE TDM lib 2016-06-07 15:56:31 -07:00
spi sound updates #2 for 4.7-rc1 2016-05-28 12:23:12 -07:00
spmi spmi: do not use bus internal data 2016-04-30 14:15:56 -07:00
ssb
staging Revert "Staging: rtl8188eu: rtw_efuse: Use sizeof type *pointer instead of sizeof type." 2016-06-17 11:21:45 -07:00
target Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2016-05-28 12:04:17 -07:00
tc
thermal Merge branch 'for-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux 2016-06-12 06:30:39 -07:00
thunderbolt thunderbolt: Fix double free of drom buffer 2016-05-02 12:09:22 -05:00
tty devpts: Make each mount of devpts an independent filesystem. 2016-06-05 10:36:01 -07:00
uio uio: add missing error codes 2016-05-01 14:11:12 -07:00
usb usbip: rate limit get_frame_number message 2016-06-17 18:00:46 -07:00
uwb
vfio vfio/pci: Allow VPD short read 2016-05-31 21:25:52 -06:00
vhost tun: switch to use skb array for tx 2016-07-01 05:32:17 -04:00
video OMAPDSS: HDMI5: Change DDC timings 2016-05-31 08:20:43 +03:00
virt
virtio virtio_balloon: fix PFN format for virtio-1 2016-05-22 19:44:13 +03:00
vlynq
vme vme: add vme_init_bridge for common bridge init 2016-05-01 14:00:00 -07:00
w1 w1: add ability to set (SRAM) and store (EEPROM) configuration for temp sensors like DS18B20 2016-05-01 14:37:49 -07:00
watchdog watchdog: ebc-c384_wdt: Allow build for X86_64 2016-06-17 20:21:12 -07:00
xen xen-pciback: return proper values during BAR sizing 2016-06-24 10:53:03 +01:00
zorro
Kconfig libnvdimm for 4.7 2016-05-23 11:18:01 -07:00
Makefile /dev/dax, pmem: direct access to persistent memory 2016-05-20 22:02:53 -07:00