This tag is for questions about the internals of the Linux kernel itself - particularly about use or configuration of kernel modules or drivers.

learn more…| top users | synonyms

0
votes
0answers
14 views

What does poll(NULL, 0, timeout) mean? [migrated]

I'm looking at strace output that includes a call to the syscall poll:http://man7.org/linux/man-pages/man2/poll.2.html(This is on a Debian system, I forget kernel version.)I keep seeing calls ...
0
votes
0answers
5 views

Cannot create Security Association in CentOS 7.4 using Setkey

I've been asked to migrate from CentOS 6.8 to 7.4 on all of our Linux devices. I'm running into an issue with loading Security Associations into the Linux kernel. I'm using ipsec-tools' ...
2
votes
1answer
4k views

What do these error messages mean and how to fix it?

==============================================================actually I figured out this is an issue of intel video driver:http://lkml.indiana.edu/hypermail/linux/kernel/0902.3/01703.html=========...
3
votes
1answer
1k views

How to Turn Off KPTI to Improve Performance in Fedora

Following the outbreak of KPTI news, I recently updated my kernel to 4.14.11-300. In addition to a quite sufficient RAM (8 GB) and fast IO (SSD disk), I have started to feel remarkable slowdown in my ...
0
votes
1answer
23 views

Dynamic or virtual file content, similar to /sys/*

Imagine you wanted a file - for example /etc/hosts - but every time the file was read, rather than reading it from the filesystem, its contents were the output of an application - for example a script ...
0
votes
0answers
16 views

Is it possible to thoroughly disable Linux printk message for “warn level”?

I'm trying my own written echo server(echosterm) on /dev/ttyGS0 on a Raspberry Pi Zero W (the echo client is a Windows PC). But I find that the echo speed is somewhat slow(peak 6.0MB/s). I check into ...
1
vote
0answers
26 views

Slow command execution time in linux

We experience some slow simple command execution time in Linux, possibly related to procfs slowness. Like simple uptime command can take few seconds to execute.Here are the inputs:Platform: AWS...
0
votes
0answers
49 views

Direct kernel boot in KVM

How do I use the direct kernel boot functionality in KVM? Could I, for example, use the OVH kernel instead of the provided kernel to boot a installed Linux OS?If yes, is it possible to boot a LXC (...
0
votes
1answer
22 views

Does kernel compiling depends on DTS files

I am trying to build a custom Linux kernel.However I don't understand whether compilation is affected by DTS files under "arch/<...>/boot/dts" or it's only up to the bootloader to pass parameters (...
1
vote
0answers
36 views

Linux kernel version error [closed]

I have an already built linux kernel image (zImage) and I want to generate the source for it. However I'm facing trouble: I understand major/minor numbers meaning but I couldn't compile the same ...
0
votes
0answers
36 views

Can the chipset on router TL-WDR4300 be used for CSI data extraction

Wanted to clear some confusion. From the link : Atheros CSI Tool where it says,Atheros-CSI-Tool is built on top of ath9k, which is an open sourceLinux kernel driver supporting Atheros 802.11n ...
8
votes
3answers
7k views

VirtualBox Ubuntu Guest Additions not installing : modprobe vboxsf failed

I just installed this software off virtual box, i downloaded the ISO off the official ubuntu website, was the lastest LTS.I attempted to install Guest Additions using the 'Insert Guest Additions CD ...
4
votes
6answers
42k views

Where can I find linux-kernel-headers-x.x.x.x for SUSE?

I'm installing VMware Workstation on a SLED 11 SP1, and the installation is blocked by an error message "Kernel headers for version 2.6.32.27-0.2-default were not found". If you installed them in a ...
0
votes
0answers
20 views

How to understand this crash dump

This a sample crash dump I have from the unit. Could anyone help me in understanding what these details mean? Example: [<c406dde4>] (sys_init_module+0x0/0x1878) from [<c400dd00>] (...
0
votes
0answers
12 views

Tracing disk access of a process e.g. JVM inside Linux, specifically Docker container

Given I have a JAR which as I assume cannot find some file path and crashes without any error.Is is possible to instrumentalize the JVM/the environment (it's Docker and Ubuntu currently) to log ...

153050per page