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Dragos Tatulea 25b8c9b6d7 net/mlx5e: XDP, Use page fragments for linear data in multibuf-mode 
Currently in XDP multi-buffer mode for striding rq a whole page is
allocated for the linear part of the XDP buffer. This is wasteful,
especially on systems with larger page sizes.

This change splits the page into fixed sized fragments. The page is
replenished when the maximum number of allowed fragments is reached.
When a fragment is not used, it will be simply recycled on next packet.
This is great for XDP_DROP as the fragment can be recycled for the next
packet. In the most extreme case (XDP_DROP everything), there will be 0
fragments used => only one linear page allocation for the lifetime of
the XDP program.

The previous page_pool size increase was too conservative (doubling the
size) and now there are much fewer allocations (1/8 for a 4K page). So
drop the page_pool size extension altogether when the linear side page
is used.

This small improvement is at most visible for XDP_DROP tests with small
64B packets and a large enough MTU for Striding RQ to be in non-linear
mode:
+----------------------------------------------------------------------+
| System               | MTU  | baseline   | this change | improvement |
|----------------------+------+------------+-------------+-------------|
| 4K page x86_64 [1]   | 9000 | 26.30 Mpps | 30.45 Mpps  | 15.80 %     |
| 64K page aarch64 [2] | 9000 | 15.27 Mpps | 20.10 Mpps  | 31.62 %     |
+----------------------------------------------------------------------+

[1] Intel Xeon Platinum 8580
[2] ARM Neoverse-N1

Signed-off-by: Dragos Tatulea <dtatulea@nvidia.com>
Reviewed-by: Carolina Jubran <cjubran@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/20260403090927.139042-6-tariqt@nvidia.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
 		2026-04-07 13:34:04 +02:00
..
accel accel/ivpu: Add disable clock relinquish workaround for NVL-A0 2026-03-24 09:29:28 +01:00
accessibility Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
acpi ACPI: EC: clean up handlers on probe failure in acpi_ec_setup() 2026-03-24 18:47:10 +01:00
amba Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
android rust_binder: use lock_vma_under_rcu() in use_page_slow() 2026-02-26 21:34:14 -08:00
ata ata: libata-scsi: report correct sense field pointer in ata_scsiop_maint_in() 2026-03-20 09:59:30 +01:00
atm Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses 2026-02-22 08:26:33 -08:00
auxdisplay auxdisplay: line-display: fix NULL dereference in linedisp_release 2026-03-27 09:54:31 +01:00
base Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2026-04-02 11:03:13 -07:00
bcma Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
block zram: do not slot_free() written-back slots 2026-03-21 17:36:33 -07:00
bluetooth Bluetooth: hci_h4: Fix race during initialization 2026-04-01 16:45:47 -04:00
bus driver core: platform: use generic driver_override infrastructure 2026-03-17 20:30:57 +01:00
cache cache: ax45mp: Fix device node reference leak in ax45mp_cache_init() 2026-02-06 19:54:40 +00:00
cdrom Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
cdx Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
char Bug fixes for the IPMI driver 2026-02-26 14:34:21 -08:00
clk Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2026-03-26 12:09:57 -07:00
clocksource Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses 2026-02-22 08:26:33 -08:00
comedi Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses 2026-02-22 08:26:33 -08:00
connector Convert more 'alloc_obj' cases to default GFP_KERNEL arguments 2026-02-21 20:03:00 -08:00
counter Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
cpufreq cpufreq: conservative: Reset requested_freq on limits change 2026-03-23 13:32:57 +01:00
cpuidle sched: idle: Make skipping governor callbacks more consistent 2026-03-10 16:03:02 +01:00
crypto Crypto library fixes for v7.0-rc5 2026-03-18 15:50:29 -07:00
cxl cxl: Adjust the startup priority of cxl_pmem to be higher than that of cxl_acpi 2026-03-19 15:12:40 -07:00
dax Convert 'alloc_flex' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
dca treewide: Replace kmalloc with kmalloc_obj for non-scalar types 2026-02-21 01:02:28 -08:00
devfreq Convert more 'alloc_obj' cases to default GFP_KERNEL arguments 2026-02-21 20:03:00 -08:00
dibs dibs: change dibs_class to a const struct 2026-03-04 18:48:15 -08:00
dio Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
dma dmaengine: xilinx_dma: Fix reset related timeout with two-channel AXIDMA 2026-03-17 16:33:32 +05:30
dma-buf Convert more 'alloc_obj' cases to default GFP_KERNEL arguments 2026-02-21 20:03:00 -08:00
dpll dpll: zl3073x: implement frequency monitoring 2026-04-03 16:48:01 -07:00
edac Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses 2026-02-22 08:26:33 -08:00
eisa Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
extcon Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses 2026-02-22 08:26:33 -08:00
firewire bonding: prevent potential infinite loop in bond_header_parse() 2026-03-16 19:29:45 -07:00
firmware soc: fixes for 7.0 2026-03-18 08:28:54 -07:00
fpga Convert more 'alloc_obj' cases to default GFP_KERNEL arguments 2026-02-21 20:03:00 -08:00
fsi Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
fwctl Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
gnss Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
gpib gpib: lpvo_usb: fix unintended binding of FTDI 8U232AM devices 2026-03-11 16:23:32 +01:00
gpio Immutable branch between GPIO and net 2026-03-09 19:11:21 -07:00
gpu Mediatek DRM Fixes - 20260323 2026-03-28 08:05:36 +10:00
greybus Convert more 'alloc_obj' cases to default GFP_KERNEL arguments 2026-02-21 20:03:00 -08:00
hid hid-for-linus-2026031701 2026-03-17 13:55:51 -07:00
hsi Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
hte Convert 'alloc_flex' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
hv mshv: Fix error handling in mshv_region_pin 2026-03-18 16:18:49 +00:00
hwmon hwmon: (pmbus/core) Protect regulator operations with mutex 2026-03-25 13:32:37 -07:00
hwspinlock soc: driver updates for 7.0 2026-02-10 20:45:30 -08:00
hwtracing Convert more 'alloc_obj' cases to default GFP_KERNEL arguments 2026-02-21 20:03:00 -08:00
i2c i2c: designware: amdisp: Fix resume-probe race condition issue 2026-03-27 13:51:21 +01:00
i3c i3c: dw-i3c-master: Set SIR_REJECT in DAT on device attach and reattach 2026-03-11 22:50:29 +01:00
idle
…
iio I3C fixes for 7.0 2026-03-14 16:25:10 -07:00
infiniband Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2026-04-02 11:03:13 -07:00
input Convert 'alloc_flex' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
interconnect Convert 'alloc_flex' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
iommu IOMMU Fixes for Linux v7.0-rc6 2026-04-02 09:53:16 -07:00
ipack Convert more 'alloc_obj' cases to default GFP_KERNEL arguments 2026-02-21 20:03:00 -08:00
irqchip Miscellaneous irqchip driver fixes: 2026-03-29 09:53:01 -07:00
isdn Convert more 'alloc_obj' cases to default GFP_KERNEL arguments 2026-02-21 20:03:00 -08:00
leds Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
macintosh Convert more 'alloc_obj' cases to default GFP_KERNEL arguments 2026-02-21 20:03:00 -08:00
mailbox treewide: Replace kmalloc with kmalloc_obj for non-scalar types 2026-02-21 01:02:28 -08:00
mcb Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
md Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses 2026-02-22 08:26:33 -08:00
media media: ccs: Avoid deadlock in ccs_init_state() 2026-03-26 13:14:07 +01:00
memory Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
memstick Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses 2026-02-22 08:26:33 -08:00
message Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses 2026-02-22 08:26:33 -08:00
mfd Convert more 'alloc_obj' cases to default GFP_KERNEL arguments 2026-02-21 20:03:00 -08:00
misc i3c: simplify combined i3c/i2c dependencies 2026-02-27 16:33:07 +01:00
mmc mmc: sdhci: fix timing selection for 1-bit bus width 2026-03-16 16:08:54 +01:00
most Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
mtd mtd: rawnand: pl353: make sure optimal timings are applied 2026-03-18 18:08:25 +01:00
mux Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
net net/mlx5e: XDP, Use page fragments for linear data in multibuf-mode 2026-04-07 13:34:04 +02:00
nfc Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2026-04-02 11:03:13 -07:00
ntb kmalloc_obj treewide refactoring for v7.0-rc1 2026-02-21 11:02:58 -08:00
nubus Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
nvdimm nvdimm/bus: Fix potential use after free in asynchronous initialization 2026-03-09 09:38:22 -05:00
nvme block-7.0-20260312 2026-03-13 10:13:06 -07:00
nvmem Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
of Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
opp Convert more 'alloc_obj' cases to default GFP_KERNEL arguments 2026-02-21 20:03:00 -08:00
parisc Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses 2026-02-22 08:26:33 -08:00
parport Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
pci PCI/pwrctrl: Fix pci_pwrctrl_is_required() device node leak 2026-03-23 15:57:43 -05:00
pcmcia Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
peci Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
perf Convert more 'alloc_obj' cases to default GFP_KERNEL arguments 2026-02-21 20:03:00 -08:00
phy Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2026-04-02 11:03:13 -07:00
pinctrl pinctrl: sunxi: fix gpiochip_lock_as_irq() failure when pinmux is unknown 2026-03-23 14:23:09 +01:00
platform platform/x86: ISST: Correct locked bit width 2026-03-24 12:31:10 +02:00
pmdomain pmdomain providers: 2026-03-20 09:46:15 -07:00
pnp Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
power power: sequencing: pcie-m2: Fix device node reference leak in probe 2026-03-04 09:16:41 +01:00
powercap Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses 2026-02-22 08:26:33 -08:00
pps Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
ps3 Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
ptp ptp: vmw: Convert to a platform driver 2026-03-17 19:06:19 -07:00
pwm Convert 'alloc_flex' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
rapidio Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
ras Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
regulator regulator: pca9450: Correct probed name for PCA9452 2026-03-10 14:52:42 +00:00
remoteproc remoteproc: imx_rproc: Fix unreachable platform prepare_ops 2026-03-05 10:18:23 -07:00
resctrl arm_mpam: Force __iomem casts 2026-03-13 14:17:30 +00:00
reset reset: rzg2l-usbphy-ctrl: Check pwrrdy is valid before using it 2026-02-23 17:03:28 +01:00
rpmsg Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
rtc RTC for 7.0 2026-02-22 09:43:11 -08:00
s390 s390 updates for 7.0-rc4 2026-03-13 14:18:13 -07:00
sbus Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
scsi Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2026-04-02 11:03:13 -07:00
sh Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
siox Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
slimbus driver core: platform: use generic driver_override infrastructure 2026-03-17 20:30:57 +01:00
soc Fixing a missing of_node_put() call. 2026-03-17 09:35:40 +01:00
soundwire Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses 2026-02-22 08:26:33 -08:00
spi spi: spi-fsl-lpspi: fix teardown order issue (UAF) 2026-03-26 12:27:42 +00:00
spmi Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
ssb Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
staging Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2026-03-19 14:16:00 -07:00
target scsi: target: file: Use kzalloc_flex for aio_cmd 2026-03-19 22:07:39 -04:00
tc Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
tee tee: shm: Remove refcounting of kernel pages 2026-03-03 09:03:04 +01:00
thermal thermal: intel: int340x: soc_slider: Set offset only for balanced mode 2026-03-24 19:00:12 +01:00
thunderbolt Convert more 'alloc_obj' cases to default GFP_KERNEL arguments 2026-02-21 20:03:00 -08:00
tty vt: save/restore unicode screen buffer for alternate screen 2026-03-13 09:15:58 +01:00
ufs scsi: ufs: core: Fix SError in ufshcd_rtc_work() during UFS suspend 2026-03-07 11:08:39 -05:00
uio Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
usb USB: ezcap401 needs USB_QUIRK_NO_BOS to function on 10gbs usb speed 2026-03-13 18:19:07 +01:00
vdpa Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses 2026-02-22 08:26:33 -08:00
vfio vfio/pci: Fix double free in dma-buf feature 2026-03-26 06:38:27 -06:00
vhost vsock: add G2H fallback for CIDs not owned by H2G transport 2026-03-12 10:59:36 +01:00
video fbdev: au1100fb: Fix build on MIPS64 2026-03-05 17:35:12 +01:00
virt virt: tdx-guest: Fix handling of host controlled 'quote' buffer length 2026-03-20 21:05:50 -07:00
virtio dma-mapping: Clarify valid conditions for CPU cache line overlap 2026-03-20 11:33:24 +01:00
w1 Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
watchdog Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
xen xen/privcmd: unregister xenstore notifier on module exit 2026-03-26 08:57:51 +01:00
zorro Convert 'alloc_flex' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
Kconfig
…
Makefile phy: enter drivers/phy/Makefile even without CONFIG_GENERIC_PHY 2026-02-04 20:45:26 +05:30