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Unix & Linux

Questions tagged [linux-kernel]

Questions about Linux kernel and Linux kernel related topics eg. implementation details such as system calls, kernel customization, etc. For Linux user space topics which do not involve kernel details, [linux] or distribution tag are more suitable.

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My goal is to flash a very simple Linux image on an Advantech ASR-A502-X0A1 board using buildroot. After many unsuccessful tries, I decided to do as simple as possible and simply flash buildroot's ...
5 votes
2 answers
501 views

In GRUB, when loading a kernel, you can pass various parameters to linux/vmlinuz, for example: menuentry 'GNU/Linux' { ... linux /live/vmlinuz boot=live config live-media=removable ...
0 votes
0 answers
47 views

I have an external I2C device that signals when data is ready using a pin. I want my Linux SBC to trigger I2C transfer routine after GPIO interrupt triggers. How would this be done within kernel space?...
6 votes
1 answer
962 views

For those who don't know, UBSAN is Undefined Behavior Address Sanitizer, and it places a whole bunch of checks in a compiled piece of code to detect mistakes, such as out-of-bounds access and various ...
1 vote
2 answers
77 views

I have a linux-box. My hdd is nvme, hence boot is fast. I need to analyze each line of after grub. Can I pass a kernel parameter to capture my boot lines?
1 vote
0 answers
40 views

OSTEP says Note that CFS utilizes a periodic timer interrupt, which means it can only make decisions at fixed time intervals. This interrupt goes off frequently (e.g., every 1 ms), giving CFS a chance ...
1 vote
0 answers
65 views

The goal is to create a mirror (aka raid1) device from two devices (to be mirrored), and (if needed) a third device that serves as the dirty region log / metadata / whatever. That, without using LVM ...
1 vote
1 answer
77 views

I have a cloud VM running linux-yocto 6.17 and a few daemon processes--postfix, dovecot, rspamd, nginx, sshd, fail2ban and redis. Ever since upgrading from 6.11 to 6.17, I've noticed that /proc/sys/fs/...
0 votes
1 answer
68 views

I would like to find out why my power button press isn't handled correctly. I've set power manager in XFCE4 to 'ask' me, but all that happens is I'm getting logged out of my session. I have contacted ...
2 votes
1 answer
52 views

The Issue I am reading this systemd documentation I have the following files: /usr/lib/systemd/network/80-wired.network [Match] eth0 [Network] Address=192.168.3.40/22 Gateway=192.168.0.1 /usr/lib/...
0 votes
0 answers
20 views

I'm troubleshooting /boot usage differences between Oracle Linux 8 systems that use different UEK kernel streams. On some hosts, the initramfs images are gzip-compressed, while others produce ...
1 vote
1 answer
420 views

I know the Linux kernel has a key retention service even though I haven't used it myself. I'm constructing a system where anybody with root cannot check the keys in that service that were registered ...
0 votes
0 answers
35 views

I am experiencing a problem when booting Linux on the Verdin Dahlia Carrier Board, where the boot log only goes up to: ################################################################# ###########...
1 vote
1 answer
53 views

I tried to upgrade my alpine linux kernel version from linux-lts to linux-stable because support for a device I am installing was added in a newer kernel version. I changed the apk repositories from ...
1 vote
1 answer
78 views

Why does there appear to be a discrepancy between a process stack address within /proc/PID/maps compared to the stack start address within /proc/PID/stat, where the latter is a smaller subset of the ...

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