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Juergen Gross 2670ecf471 xen/netfront: raise max number of slots in xennet_get_responses() 
[ Upstream commit 57f230ab04d2910a06d17d988f1c4d7586a59113 ]

The max number of slots used in xennet_get_responses() is set to
MAX_SKB_FRAGS + (rx->status <= RX_COPY_THRESHOLD).

In old kernel-xen MAX_SKB_FRAGS was 18, while nowadays it is 17. This
difference is resulting in frequent messages "too many slots" and a
reduced network throughput for some workloads (factor 10 below that of
a kernel-xen based guest).

Replacing MAX_SKB_FRAGS by XEN_NETIF_NR_SLOTS_MIN for calculation of
the max number of slots to use solves that problem (tests showed no
more messages "too many slots" and throughput was as high as with the
kernel-xen based guest system).

Replace MAX_SKB_FRAGS-2 by XEN_NETIF_NR_SLOTS_MIN-1 in
netfront_tx_slot_available() for making it clearer what is really being
tested without actually modifying the tested value.

Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-08-06 16:24:30 +02:00
..
accessibility
acpi ACPICA: acpi: acpica: fix acpi operand cache leak in nseval.c 2018-05-30 07:49:11 +02:00
amba ARM: amba: Don't read past the end of sysfs "driver_override" buffer 2018-05-02 07:53:42 -07:00
android binder: add missing binder_unlock() 2018-02-28 10:17:23 +01:00
ata ahci: Disable LPM on Lenovo 50 series laptops with a too old BIOS 2018-07-17 11:31:43 +02:00
atm atm: zatm: Fix potential Spectre v1 2018-07-22 14:25:52 +02:00
auxdisplay
base driver core: Partially revert "driver core: correct device's shutdown order" 2018-07-28 07:45:03 +02:00
bcma
block loop: remember whether sysfs_create_group() was done 2018-07-17 11:31:46 +02:00
bluetooth Bluetooth: hci_qca: Avoid missing rampatch failure with userspace fw loader 2018-07-03 11:21:28 +02:00
bus bus: brcmstb_gisb: correct support for 64-bit address output 2018-04-13 19:50:05 +02:00
cdrom cdrom: do not call check_disk_change() inside cdrom_open() 2018-05-30 07:49:13 +02:00
char ipmi:bt: Set the timeout before doing a capabilities check 2018-07-03 11:21:28 +02:00
clk clk: tegra: Fix PLL_U post divider and initial rate on Tegra30 2018-07-25 10:18:32 +02:00
clocksource clocksource/drivers/fsl_ftm_timer: Fix error return checking 2018-05-30 07:49:01 +02:00
connector
cpufreq cpufreq: Fix new policy initialization during limits updates via sysfs 2018-07-03 11:21:26 +02:00
cpuidle cpuidle: powernv: Fix promotion from snooze if next state disabled 2018-07-03 11:21:29 +02:00
crypto crypto: crypto4xx - fix crypto4xx_build_pdr, crypto4xx_build_sdr leak 2018-07-22 14:25:52 +02:00
dca
devfreq PM / devfreq: Propagate error from devfreq_add_device() 2018-02-22 15:44:58 +01:00
dio
dma dmaengine: usb-dmac: fix endless loop in usb_dmac_chan_terminate_all() 2018-06-06 16:46:22 +02:00
dma-buf
edac EDAC, mv64x60: Fix an error handling path 2018-04-13 19:50:23 +02:00
eisa
extcon extcon: palmas: Check the parent instance to prevent the NULL 2017-11-21 09:21:18 +01:00
firewire firewire-ohci: work around oversized DMA reads on JMicron controllers 2018-05-30 07:48:52 +02:00
firmware firmware: dmi_scan: Fix handling of empty DMI strings 2018-05-30 07:48:56 +02:00
fmc
fpga
gpio gpio: No NULL owner 2018-06-16 09:54:26 +02:00
gpu drm: set FMODE_UNSIGNED_OFFSET for drm files 2018-06-13 16:15:27 +02:00
hid HID: usbhid: add quirk for innomedia INNEX GENESIS/ATARI adapter 2018-07-17 11:31:43 +02:00
hsi HSI: ssi_protocol: double free in ssip_pn_xmit() 2018-03-24 10:58:42 +01:00
hv Drivers: hv: vmbus: fix build warning 2018-02-25 11:03:46 +01:00
hwmon hwmon: (pmbus/adm1275) Accept negative page register values 2018-05-30 07:49:13 +02:00
hwspinlock
hwtracing hwtracing: stm: fix build error on some arches 2018-06-06 16:46:23 +02:00
i2c i2c: rcar: fix resume by always initializing registers before transfer 2018-07-11 16:03:47 +02:00
ide cdrom: do not call check_disk_change() inside cdrom_open() 2018-05-30 07:49:13 +02:00
idle idle: i7300: add PCI dependency 2018-02-25 11:03:51 +01:00
iio iio:buffer: make length types match kfifo types 2018-07-03 11:21:30 +02:00
infiniband RDMA/ucm: Mark UCM interface as BROKEN 2018-07-17 11:31:46 +02:00
input Input: elan_i2c - add another ACPI ID for Lenovo Ideapad 330-15AST 2018-08-06 16:24:29 +02:00
iommu x86/cpufeature: Remove unused and seldomly used cpu_has_xx macros 2018-06-16 09:54:24 +02:00
ipack
irqchip irqchip/gic-v3: Change pr_debug message to pr_devel 2018-05-30 07:48:57 +02:00
isdn isdn: eicon: fix a missing-check bug 2018-06-13 16:15:28 +02:00
leds leds: pca955x: Correct I2C Functionality 2018-04-13 19:50:09 +02:00
lguest
lightnvm
macintosh
mailbox mailbox: handle empty message in tx_tick 2017-08-06 19:19:41 -07:00
mcb
md dm bufio: don't take the lock in dm_bufio_shrink_count 2018-07-11 16:03:51 +02:00
media media: cx25840: Use subdev host data for PLL override 2018-07-11 16:03:51 +02:00
memory ARM: OMAP2+: gpmc-onenand: propagate error on initialization failure 2017-12-16 10:33:51 +01:00
memstick
message scsi: mptfusion: Add bounds check in mptctl_hp_targetinfo() 2018-05-30 07:48:58 +02:00
mfd mfd: intel-lpss: Program REMAP register in PIO mode 2018-07-03 11:21:32 +02:00
misc vmw_balloon: fix inflation with batching 2018-07-17 11:31:43 +02:00
mmc mmc: sdhci-iproc: fix 32bit writes for TRANSFER_MODE register 2018-05-30 07:48:51 +02:00
mtd ubi: fastmap: Erase outdated anchor PEBs during attach 2018-07-25 10:18:33 +02:00
net xen/netfront: raise max number of slots in xennet_get_responses() 2018-08-06 16:24:30 +02:00
nfc NFC: nfcmrvl: double free on error path 2018-03-22 09:23:23 +01:00
ntb ntb_transport: Fix bug with max_mw_size parameter 2018-05-30 07:48:55 +02:00
nubus
nvdimm linvdimm, pmem: Preserve read-only setting for pmem devices 2018-07-03 11:21:31 +02:00
nvme nvme-pci: initialize queue memory before interrupts 2018-07-11 16:03:47 +02:00
nvmem nvmem: imx-ocotp: Fix wrong register size 2017-08-06 19:19:46 -07:00
of of: unittest: for strings, account for trailing \0 in property length field 2018-07-03 11:21:29 +02:00
oprofile
parisc parisc/pci: Switch LBA PCI bus from Hard Fail to Soft Fail mode 2018-05-30 07:49:10 +02:00
parport parport_pc: Add support for WCH CH382L PCI-E single parallel port card. 2018-04-08 11:52:00 +02:00
pci PCI: pciehp: Clear Presence Detect and Data Link Layer Status Changed on resume 2018-07-03 11:21:30 +02:00
pcmcia
perf drivers/perf: arm_pmu: handle no platform_device 2018-03-22 09:23:26 +01:00
phy phy: work around 'phys' references to usb-nop-xceiv devices 2018-01-23 19:50:16 +01:00
pinctrl pinctrl: Really force states during suspend/resume 2018-03-24 10:58:48 +01:00
platform platform/chrome: Use proper protocol transfer function 2018-03-24 10:58:47 +01:00
pnp
power power: supply: pda_power: move from timer to delayed_work 2018-03-24 10:58:45 +01:00
powercap PowerCap: Fix an error code in powercap_register_zone() 2018-04-13 19:50:05 +02:00
pps
ps3
ptp ptp: fix missing break in switch 2018-07-25 10:18:17 +02:00
pwm pwm: tegra: Increase precision in PWM rate calculation 2018-03-22 09:23:27 +01:00
rapidio
ras
regulator regulator: of: Add a missing 'of_node_put()' in an error handling path of 'of_regulator_match()' 2018-05-30 07:49:17 +02:00
remoteproc
reset
rpmsg
rtc rtc: tx4939: avoid unintended sign extension on a 24 bit shift 2018-05-30 07:49:14 +02:00
s390 scsi: zfcp: fix missing REC trigger trace on enqueue without ERP thread 2018-07-03 11:21:31 +02:00
sbus
scsi scsi: sg: mitigate read/write abuse 2018-07-11 16:03:48 +02:00
sfi
sh
sn
soc
spi spi: Fix scatterlist elements size in spi_map_buf 2018-07-03 11:21:35 +02:00
spmi spmi: Include OF based modalias in device uevent 2017-07-27 15:06:10 -07:00
ssb ssb: mark ssb_bus_register as __maybe_unused 2018-02-25 11:03:44 +01:00
staging staging: comedi: quatech_daqp_cs: fix no-op loop daqp_ao_insn_write() 2018-07-11 16:03:51 +02:00
target tcm_fileio: Prevent information leak for short reads 2018-03-24 10:58:45 +01:00
tc
thermal thermal: imx: Fix race condition in imx_thermal_probe() 2018-04-24 09:32:08 +02:00
thunderbolt thunderbolt: Resume control channel after hibernation image is created 2018-04-24 09:32:07 +02:00
tty n_tty: Access echo_* variables carefully. 2018-07-11 16:03:47 +02:00
uio
usb usb: gadget: f_fs: Only return delayed status when len is 0 2018-07-28 07:45:03 +02:00
uwb uwb: ensure that endpoint is interrupt 2017-10-12 11:27:35 +02:00
vfio vfio/pci: Virtualize Maximum Read Request Size 2018-04-24 09:32:09 +02:00
vhost vhost_net: validate sock before trying to put its fd 2018-07-22 14:25:53 +02:00
video video: uvesafb: Fix integer overflow in allocation 2018-07-03 11:21:34 +02:00
virt
virtio virtio_balloon: prevent uninitialized variable use 2018-02-25 11:03:42 +01:00
vlynq
vme
w1 1wire: family module autoload fails because of upper/lower case mismatch. 2018-07-03 11:21:27 +02:00
watchdog watchdog: f71808e_wdt: Fix magic close handling 2018-05-30 07:49:03 +02:00
xen xen: Remove unnecessary BUG_ON from __unbind_from_irq() 2018-07-03 11:21:34 +02:00
zorro zorro: Set up z->dev.dma_mask for the DMA API 2018-05-30 07:49:11 +02:00
Kconfig
Makefile usb: build drivers/usb/common/ when USB_SUPPORT is set 2018-02-25 11:03:38 +01:00