netmap_ring request size too large

[kevin-mcm]

Hello All,

I'm getting the following error on dmesg:

> dmesg -T
[Thu May 16 09:37:52 2024] 671.506329 [1134] generic_netmap_attach     Emulated adapter for eth1 created (prev was NULL)
[Thu May 16 09:37:52 2024] 671.508927 [1026] netmap_obj_malloc         netmap_ring request size 262400 too large
[Thu May 16 09:37:52 2024] 671.511468 [2001] netmap_mem2_rings_create  Cannot allocate RX_ring
[Thu May 16 09:37:52 2024] 671.513423 [1039] generic_netmap_dtor       Emulated netmap adapter for eth1 destroyed

this is on Oracle 8.9 with the following specifications:

Specifications

> cat /etc/oracle-release
Oracle Linux Server release 8.9
> uname -r
4.18.0-513.24.1.el8_9.x86_64
> lscpu
Architecture:        x86_64
CPU op-mode(s):      32-bit, 64-bit
Byte Order:          Little Endian
CPU(s):              4
On-line CPU(s) list: 0-3
Thread(s) per core:  2
Core(s) per socket:  2
Socket(s):           1
NUMA node(s):        1
Vendor ID:           AuthenticAMD
BIOS Vendor ID:      Advanced Micro Devices, Inc.
CPU family:          23
Model:               1
Model name:          AMD EPYC 7571
BIOS Model name:     AMD EPYC 7571
Stepping:            2
CPU MHz:             2199.764
BogoMIPS:            4399.52
Hypervisor vendor:   KVM
Virtualization type: full
L1d cache:           32K
L1i cache:           64K
L2 cache:            512K
L3 cache:            8192K
NUMA node0 CPU(s):   0-3
> free -h
              total        used        free      shared  buff/cache   available
Mem:           31Gi       5.0Gi        21Gi        41Mi       4.8Gi        25Gi
Swap:            0B          0B          0B
> ethtool -i eth1
driver: ena
version: 4.18.0-513.24.1.el8_9.x86_64
firmware-version:
expansion-rom-version:
bus-info: 0000:00:06.0
supports-statistics: yes
supports-test: no
supports-eeprom-access: no
supports-register-dump: no
supports-priv-flags: no

---

Please let me know if you need more information

Thanks in advance

[giuseppelettieri]

You just need to increase the size of the pre-allocated netmap rings, with something like (as root)

echo 262400 > /sys/module/netmap/parameters/ring_size

then restart your netmap applications.

[kevin-mcm]

You just need to increase the size of the pre-allocated netmap rings, with something like (as root)

echo 262400 > /sys/module/netmap/parameters/ring_size

then restart your netmap applications.

Thank you for your response.
Before creating this issue, I tried increasing the ring size with the same command, but I kept getting the same error