The main component of most operating systems, the kernel manages most of a computer's communication between hardware and software. Typically, the kernel is the lowest level of abstraction a programmer can have to a resource.

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533 views

Computer crashes constantly after upgrading from Debian Wheezy to Jessie

I’m on a Lenovo ThinkPad T430 which had Debian Wheezy running solid/stable. No crashes, ever. Upgraded to Debian Jessie recently and been having crashes; it seems like Gnome crashes. By crash, it ...
0
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0answers
8 views

BCM4331 Installation issues on FreeBSD 10.2

I have been unable to find the 'right' 64-bit XP drivers to use ndisgen to create a working module -- I can get it to recognize the card but it has exit errors there are always IRQ and memory leak ...
0
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0answers
14 views

How to see Kernel Oops/Panic? and provide “proof”

I'm doing this assignment and I'm kind of confused on providing proof for kernel oops/panic static int __init hello_init(void) { printk(KERN_INFO "Hello world!\n"); return 1/0; ...
0
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0answers
21 views

Kernel threads and process virtual address

If the kernel is spawned as threads and resides in the memory then how could the ps command identify them if those are not normal process and i give you more look here: root 2 0 0 ...
18
votes
5answers
8k views

Is kernel a process?

In Linux, we always say the first process is init(pid==1). but why is not the kernel(startup) which setup the system and create init process. Is kernel a process? We know all the user space threads ...
2
votes
4answers
16k views

MacBook freezes, console printing kernel: disk0s2 I/O error

Yesterday I've closed my MacBook , opened it today and experienced horrible performance slowdown, beach ball and eventually a freeze. After several reboots I managed to close most of my applications ...
0
votes
0answers
15 views

Memory heirarchies and kernel boot options

I'm booting a Ubuntu 14.04.3 LTS server on a Core-i5 T5200U machine with kernel boot options agp=off ipv6.disable=1 intremap=no_x2apic_optout biosdevname=0 audit=0. When I inspect dmesg, I see the ...
0
votes
0answers
21 views

On which version of Linux Kernel the usb enumeration changed?

Grettings. I'm trying to build a new and customized version of linux using LFS guides and etc. The thing about doing this is because I'm trying to build a linux kernel where the usb enumeration was ...
0
votes
0answers
20 views

How to solve Kernel discrepancy

I am running Centos 7, when I tried to upgrade the kernel or check the version it shows me an older version running. Yet it seems the newer one is in place and installed. Any idea how to fix this ...
0
votes
0answers
12 views

How to increase voltage of android sound jack from kernel? [migrated]

I want to increase my headphone jack voltage from kernel , how i can find the sound folder and sound module files in android kernel , I used viper and other softwares , they are not powerful as ...
1
vote
0answers
29 views

Sleep and restart issue related to registry or BIOS

I have been looking all over the internet for about half a year now.. Before: 1. Installed many antivirus programs 2. sucked (AVG) so I uninstalled it 3. AVG gave me MacAfee AntiVirus while ...
3
votes
4answers
392 views

Is the Windows kernel considered an “application”?

If it is true that all Windows files with the ".exe" file extension are considered "applications", is NTOSKRNL.exe, the Windows kernel, an "application", or is this an exception to the rule? What ...
0
votes
2answers
35 views

Ubuntu 15.10 modified kernel module won't load - must be done manually

A module called alx, which drives my Qualcomm AR8161 Ethernet, loads up on boot and is visible with lsmod. This module is buggy. I found the patches, download the source code for my running kernel, ...
0
votes
0answers
16 views

how to deal with there is no tpm_tis.ko?

I am ready to develop an application with TPM. But after turning on TPM chips enabled in the bios,there is no tpm_tis.ko in the /lib/modules/3.16.0-59-generic/kernel/drivers/char/tpm/ directory. So, ...
1
vote
0answers
9 views

How to Disable Linux kernel tracer

I have installed Ubuntu 12.04 (32bit). The current tracer is set as nop. cat current_tracer nop cat tracing_on 0 Although the current tracer is nop and tracing is disabled, all these following ...
0
votes
1answer
142 views

show windows kernel memory

Is there a command-line tool that shows the Kernel Memory (and will let me redirect the output)? (Win2K and XP, at least) The task manager shows it on the main page (Total, Paged and Nonpaged), but ...
0
votes
3answers
2k views

Mac kernel panic, how to solve this?

I got the following kernel dump my Mac Mini after hibernation. This issue has been a certain event after Mac going into hibernation for a period of time. Then I tried to reinstall Yosemite on my Mac ...
0
votes
0answers
19 views

Atheros AR928X cannot connect to Nokia Lumia Hotspot on latest 4.4 kernel (OpenSuse Tumbleweed)

I've changed distribution from Linux Mint Rafaela to the latest OpenSuse Tumbleweed, and after doing that: my wifi adapter doesn't see anymore the wifi(802.11n) created by the Nokia Lumia phone. ...
0
votes
1answer
3k 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
3k views

Kernel data types u8, u16, u32, u64 not resolved

I am trying to compile some files related to wireless subsystem (mac80211) which use datatypes u8, u16, u32, u64. These are not resolved. The header file being referred to is linux/types.h which is ...
2
votes
2answers
4k views

Ubuntu Server 13.10: How to downgrade kernel

Ubuntu Server 13.10 appears to be very unstable, I got random crashes of the system with no apparent reason and nothing is showing in syslog. This is screenshot from the console when the crash ...
5
votes
1answer
69 views

Hairpinning in Linux

I have a router in which I installed a Linux system. I want my router to support NAT hairpinning. Does a such feature exists in Kernel Linux? If yes how to activate it? Are there a patch to apply it ...
2
votes
1answer
3k views

What does this mean: considerRebuildOfPrelinkedKernel prebuild rebuild has expired

A line I accidentally spotted in system.log on MacOS X 10.9.1 when I connected an external USB webcam for the first time ever.... Subsequent connects to the usb port did not produce this message ...
5
votes
1answer
78 views

WD Green Hard Drive and home linux server

Are newer WD Green Hard Drives still a problem for Linux nowadays? The discussion here is focused on home linux servers, not NAS or data centers. Here is a summary of my research from googling. ...
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vote
0answers
31 views

kswapd uses 100% of one core, no swap in system. Possible _raw_spin_lock kernel bug. No solution for long time

Sometimes kswapd0 uses 100% of one core. This issue happens during all 4.0+ kernels. drop_caches didn't work. Adding swap didn't work. There is no rule when problem appears. It can wait 1-2 weeks. It ...
37
votes
3answers
41k views

Obtain kernel config from currently running Linux system?

I accidentally deleted my .config for my kernel configuration on Linux, and seem to remember there was a way to retrieve the kernel configuration via the proc filesystem somehow. Is this still ...
4
votes
1answer
39 views

Backing Up Kernel Modules from a GNU/Linux installation

How can I create a backup of all the driver modules (especially those that are not part of the original kernel yet) from an installation of GNU/Linux OS? The original source of the proprietary ...
10
votes
6answers
21k views

How to add a new kernel to grub2

How can we add a kernel to grub2? i knew the stuff we could do with the former versions, but it seems to have changed. What files should we edit?
0
votes
0answers
16 views

GNU/Linux distro with the kernel v3.13 low latency

I am a Linux guy with a 100% free Linux distro sponsored by the Free Software Foundation called Trisquel GNU/Linux (v7) 64-bits. It has the linux kernel v3.13 low latency and I wanted to update the ...
3
votes
1answer
600 views

How to stop jbd2 to release a device

In an AWS EC2 instance, we have multiple EBS volumes. When I try to detach any of them, the umount command works, but the device can't be detached. # grep -c xvdj /proc/mounts 0 However, lsof ...
1
vote
2answers
57 views

Does a USB drive have head, track etc?

I wrote a bootloader and I need it to be written to a USB drive. Since I am on Windows, my bootloader must support file systems such as FAT32 and FAT16 etc. I have used BPB (BIOS Parameter Block) for ...
0
votes
2answers
83 views

kworker is running modprobe every second

Using fatrace, I discovered that on my computer, modprobe runs approximately every second. To find out why, I replaced modprobe temporarily with this script: #!/bin/bash echo "$0" "$@" > ...
3
votes
1answer
92 views

Pressing Alt+Left/Right causes screen flicker

I run Arch Linux with a "normal" Xorg desktop, that is, using LightDM as login manager and the i3 Window Manager (with some components from Xfce, GNOME and KDE as needed). The graphics is the ...
-1
votes
1answer
28 views

does the gcc compiler have any relation with the OS scheduler? [closed]

All is in the title I want to know if is there any relation between the compiler and the scheduler ?
7
votes
2answers
25k views

What is Kernel Memory? What function does it serve?

While looking at my Task Manager on Windows, I noticed a little thing marked "Kernel Memory." What exactly is this? And what function does it serve compared to the Physical Memory?
1
vote
2answers
389 views

Free space in /boot partition with dependency loop

Summarising my problem is that my /boot partition is almost full but I can't free it up due some dependencies loop. Detailed description: I am running a Ubuntu 14.04.2 LTS which has the /boot ...
10
votes
6answers
12k views

How do I know if my linux kernel is running in 32bit or 64bit?

When I do a cat in /proc/cpuinfo it shows a line with clflushsize : 64 Does this mean my kernel is running in 64 bits?
1
vote
0answers
25 views

welcome to emergency model

After I change the disk partitions and reboot I get this message and can not enter system normally. /dev/sda1 * 2048 10487807 10485760 5G c W95 FAT32 (LBA) /dev/sda2 10487808 ...
5
votes
1answer
134 views

Where the Ubuntu's source can be gotten?

Where can I get Ubuntu's source code? Actually I want It's kernel's code. I know I can get the kernel from kernel.org but as I found out that Ubuntu does some patching on the kernel I want to know ...
0
votes
0answers
38 views

Why is a dkms module still installed in “dkms autoinstall” after “dkms remove --all”?

I have the flashcache dkms module in /var/lib/dkms/flashcache/1.0-235-g4754b66cfe56. I ran dkms remove flashcache/1.0-235-g4754b66cfe56 --all multiple times, but everytime I run dkms autoinstall the ...
0
votes
1answer
30 views

How can I install kernel 3.4 and its sources on Ubuntu 14.04

The application I am trying to build is incompatible with the current kernel (3.19). It only supports kernel versions up to 3.4. I'm running ubuntu 14.04. What would be the correct procedure to ...
1
vote
0answers
59 views

Linux kernel AVX2 support

I would like to know when was the Linux kernel modified to incorporate full support for AVX2 instruction sets. I have tested some software using AVX2 instruction set that someone else claims is 20% ...
1
vote
1answer
35 views

What is the size of nanokernel?

My kernel size is approximately 32KB. Can I call this as nanokernel? what is the size limitation (or range) for kernel to be called as nanokernel?
1
vote
0answers
204 views

How to upgrade kernel in Ubuntu 14.04?

I want to use Docker on my Linux server for which I need to upgrade the kernel to 3.10 or higher. So following this answer I was trying sudo apt-get install linux-generic-lts-trusty, which results in: ...
0
votes
0answers
37 views

Disable kernel module loading on custom initramfs.igz

my machine, which runs GNU/Funtoo Linux on one of the 2 raid0 arrays it has, needs an initramfs with dmraid support to boot into the system. During the last 7 years i've been using a custom initramfs ...
1
vote
0answers
54 views

Installed libncurses5-dev, but can't make menuconfig [closed]

I'm new to Linux, I found some links in Internet to Build and install Kernel(Just want to play :-P). I installed required libraries(ncurses libraries), kernel headers(sudo apt-get install ...
0
votes
1answer
81 views

ping not calculating microseconds anymore

Today I decided to update my old el5 kernel with yum after years. What I didn't know is that the kernel that was running was custom and after updating and rebooting the network drivers started to fail ...
3
votes
2answers
40 views

Does Installing a driver increase linux kernel memory footprint?

I have read that linux kernel is monolithic kernel and it contains drivers within it, in a single file. For example, I have two linux kernels 3.16.0.40 and 3.16.0.50 Currently booted system with ...
0
votes
1answer
25 views

user mode linux - how to create 32-bit linux

i am trying to compile my own UML kernel. I achieved to created a ./linux executable, however this is 64bit on my 32 bit system. file vmlinux vmlinux: ELF 64-bit LSB executable, x86-64, version 1 ...
0
votes
0answers
97 views

High kernel latency ALL windows

I have been known about this site for a while. So I decided to register since most hardware and enthusiast forums well uhh you know, not worth it. Im a certified hardware tech and I noticed some ...