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Questions tagged [linux-kernel]

The Linux kernel is the operating system kernel used by the Linux family of Unix-like operating systems. It is one of the most prominent examples of free and open source software.

The Linux kernel is the operating system kernel used by the Linux family of Unix-like operating systems. It is one of the most prominent examples of free and open source software.

The Linux kernel is released under the GNU General Public License version 2 (GPLv2) (plus some firmware images with various non-free licenses[citation needed]), and is developed by contributors worldwide. Day-to-day development discussions take place on the Linux kernel mailing list.

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No irq handler for vector - randomly starting after time

I don't know where to start, so I give some basic information about my system and my observation. I'm having a Fedora 37 Linux server at home. After some uptime (happens after 3-5 days after booting), it starts to write following messages to…
Michael Hirschler
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GTP-U configuration in OVS

I'm trying to configure a virtual GTP-U interface in OVS, however when I try the below command (from https://docs.openvswitch.org/en/latest/faq/configuration/): Q: Does Open vSwitch support GTP-U? A: Yes. Starting with version 2.13, the Open…
A. Trevelyan
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Can't load new modules/driver due to "Exec format error" / "Skipping invalid relocation target"

I'm trying to update the driver for our Intel C62x Chipset QuickAssist Technology add-on card, but getting the mentioned errors when I try to load the modules. I haven't done this in a while, but I thought the process was pretty…
AGI-Chandler
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Is there any hardware requirements for Linux kTLS in nginx?

I've followed closely the manual on NGINX blog. This works flawlessly on my machine, with an AMD Ryzen PRO 4750G. The output for a 5GB file using curl on https://localhost is twice as fast with kTLS, which is neat. I've duplicated the same…
Adrien Clerc
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Reusing Virtual Network Devices across different customers

I am trying to reuse virtual networks(made of virtual linux network devices) across customers. I am facing issue where we are not able to find if there is any network packet from previous customer is stuck in any of virtual network devices queue or…
Prashant Singh
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how to delete a file by a inode in linux kernel

I got the inode of a file in linux kernel, I want to delete the file by the inode. Do I need to unlink every dentry of the inode? or do I need to unlink any dentry? Which locks should I use to protect what?
user1651758
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Facing issue with installing Rocky Linux 8.6 on EXSI 6.0

I installed Rocky Linux 8.6 on Vmware EXSI 6.0 after installation when the system is trying to boot after the grub splash screen I am getting an error of Kernel Panic - not syncing: Fatal exception Kindly help me to fix this & provide a solution…
vinv27009
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Linux process scheduling by user?

It seems Linux schedules process execution independently of the user of the process. So, if one user is running 100 processes and another user is running 1 process, in average, the first one will get 100x more CPU time than the second one. Is there…
João M. S. Silva
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"ALERT! /dev/mapper/vg0-root does not exist. Dropping to a shell!" when compile linux kernel

I compiled linux kernel and got the error seems like initrd can't read file system. I tried both in LVM and non-LVM but none of them work. With LVM, the error showed: **ALERT! /dev/mapper/vg0-root does not exist. Dropping to a…
hoa.le
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Debian 11 : Can't add squashfs to /proc/filesystems

I'm trying to fix an issue with snap I'm having : root@puppeteer:~# snap install core error: system does not fully support snapd: cannot mount squashfs image using "squashfs": mount: /tmp/sanity-mountpoint-180662911: unknown filesystem type…
hendr1x
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Where is my eBPF per-cpu-array data going?

I have a test case similar to code in https://github.com/xdp-project/xdp-tutorial/ which maintains a statistic map in a per-cpu array, and user-space code which displays the statistics periodically. When I run this, the user space code always…
Chris Ward
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How to get the kernel not to treat a packet injected through tun/tap as a 'martian'

I have a new test case for https://github.com/xdp-project/bpf-examples here https://github.com/tjcw/bpf-examples/tree/tjcw-integration-0.3/AF_XDP-filter . It is for filtering flows; the idea is to send the first packet of a flow to userspace, have…
Chris Ward
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How to trace NAT traffic (port-forwarding) from guest VM back to host

I have a host and guest Virtual-Machine (VirtualBox) with NAT Networking with the following network interfaces. How to trace traffic from local IP 10.0.2.15 i.e. guest's IP back to Host ? Host Ubuntu ip route show default via 192.168.68.1 dev…
HumayunM
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How to pass driver parameters via dkms?

I am trying build/install a driver via dkms. I have successfully started the driver with its default parameters but not sure how to add optional params? For example to install the driver using insmod I can specify an arg such as: insmod ./rp2.ko…
dranobob
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There is no dir "/sys/devices/pci0000:00/0000:00:02.0/mdev_supported_types" with 5.19.0-23-generic

I've an issue with 5.19.0-23-generic #24-Ubuntu SMP, — there is no /sys/devices/pci0000:00/0000:00:02.0/mdev_supported_types dir. uname -a Linux hp1 5.19.0-23-generic #24-Ubuntu SMP PREEMPT_DYNAMIC Fri Oct 14 15:39:57 UTC 2022 x86_64 x86_64 x86_64…
Yaroslav Minieiev
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