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Unix & Linux

Questions tagged [kernel]

Everything about Unix kernels: development, configuration, compilation, design, etc.

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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 ...
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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?...
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34 views

I'm exploring qemu system emulation with custom-built Linux kernels, starting with mips. To start, I'm trying to get to the point of the kernel simply panicking before I add a rootfs, but I can't even ...
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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 ...
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Glad to a new keyboard and a mouse that have plenty of lights now, I've noticed this: When I turn on my computer the BIOS Power-On Self Test (POST) happens. And I can see that my mouse and keyboard ...
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1 answer
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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/...
1 vote
1 answer
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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 ...
1 vote
1 answer
78 views

I just had to order a new battery which died after just one year of usage. Apart from the cost, this is a bit environmentally wasteful - waste of lithium and rare earths. So now I have learned that ...
3 votes
2 answers
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My system is working just fine. The questions at the end of all this are; does the kernel keep a cache of device information; is it possible for it to be only partly updated, leaving a mix of new &...
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1 answer
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This kernel is identical to Linux official kernel but they remove all proprietary binary firmware and there is not possibility to load it, this mean more safety and more os. https://linux-libre.fsfla....
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1 answer
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I've a problem with kernel versions starting from version 6.16. it was working in kernel 6.15. In kernel 6.15, when I put my laptop to sleep and resume from it, the Wi-Fi does not resume. So I am no ...
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47 views

Running on Ubuntu 24.04, trying to rebuild the existing 6.14.0-33 kernel with some modifications I need around RT & Power management. I followed the instructions here : https://canonical-kernel-...
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5 votes
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Here's an example /proc/crypto entry: name : md5 driver : md5-generic module : kernel priority : 0 refcnt : 1 selftest : passed internal : no type : shash ...
1 vote
1 answer
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We have kernel dirty bytes settings configured as below. vm.dirty_background_bytes = 262144000 vm.dirty_background_ratio = 0 vm.dirty_bytes = 0 vm.dirty_expire_centisecs = 0 vm.dirty_ratio = 10 vm....
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1 answer
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I start to cross-compile a kernel for an old ppc64 machine using a fast amd64 machine. I have installed all deps apt -y install bash-completion make build-essential linux-source bc kmod cpio flex ...

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