On Ubuntu 24.04.3, using a Mellanox Connect-x Ex with 2x 100Gb ports and connected to a Windows 11 24H2, connecting with smb direct, I got a lot of kernel: ksmbd: hash value diff and the error ksmbd: Unimplemented Fileinfoclass :39 each time I write a file on the smb share.
My two systems have a direct connection.
It seems each time I read a file, I got this hash value diff error.
When reading a video file in image sequence (each image is a file), it has a significant impact on the reading speed. It goes from 8GB/s to 1.5GB/s
I tested with ksmbd-tools 3.5.1 (from Ubuntu repo), 3.5.3 and 3.5.5.
FYI, I've done some test earlier this year, in March, also with Ubuntu 24.04 and with ksmbd-tools 3.5.3, but my Windows system was in Windows 10, and I didn't have this problem. I'll see to reinstall Windows 10 asap to check if it's something related to Windows 11.
Here is the uname -a output
Linux DEV-RDMA 6.8.0-86-generic #87-Ubuntu SMP PREEMPT_DYNAMIC Mon Sep 22 18:03:36 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
And the os-release:
PRETTY_NAME="Ubuntu 24.04.3 LTS"
NAME="Ubuntu"
VERSION_ID="24.04"
VERSION="24.04.3 LTS (Noble Numbat)"
VERSION_CODENAME=noble
ID=ubuntu
ID_LIKE=debian
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
UBUNTU_CODENAME=noble
LOGO=ubuntu-logo
Let me know if you need additional information or if you need me to run some tests.
On Ubuntu 24.04.3, using a Mellanox Connect-x Ex with 2x 100Gb ports and connected to a Windows 11 24H2, connecting with smb direct, I got a lot of kernel: ksmbd: hash value diff and the error ksmbd: Unimplemented Fileinfoclass :39 each time I write a file on the smb share.
My two systems have a direct connection.
It seems each time I read a file, I got this hash value diff error.
When reading a video file in image sequence (each image is a file), it has a significant impact on the reading speed. It goes from 8GB/s to 1.5GB/s
I tested with ksmbd-tools 3.5.1 (from Ubuntu repo), 3.5.3 and 3.5.5.
FYI, I've done some test earlier this year, in March, also with Ubuntu 24.04 and with ksmbd-tools 3.5.3, but my Windows system was in Windows 10, and I didn't have this problem. I'll see to reinstall Windows 10 asap to check if it's something related to Windows 11.
Here is the uname -a output
Linux DEV-RDMA 6.8.0-86-generic #87-Ubuntu SMP PREEMPT_DYNAMIC Mon Sep 22 18:03:36 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
And the os-release:
PRETTY_NAME="Ubuntu 24.04.3 LTS"
NAME="Ubuntu"
VERSION_ID="24.04"
VERSION="24.04.3 LTS (Noble Numbat)"
VERSION_CODENAME=noble
ID=ubuntu
ID_LIKE=debian
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
UBUNTU_CODENAME=noble
LOGO=ubuntu-logo
Let me know if you need additional information or if you need me to run some tests.