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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High CPU from ntoskrnl.exe during idle on GetStackLimits

I'm having a weird bug in Windows 10. After 5 minutes of idle, my cpu goes high. I used Win Performance Analyzer and found that it happens inside the ntoskrnl.exe on the thread GetStackLimits. I ...
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1answer
14 views

Centos 7 , cant update kernel

I am running centos-7(vm) on http://www.ovh.com/. My kernel version is 2.6.32-042stab108.8. Even after yum clean all && yum update and reboot. still kernel version is 2.6.32-042stab108.8. Any ...
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13 views

How much of Mac OS X can you actually build from source, and how to do it?

Apple releases quite a bit of its OS X source to the public, including the kernel and many other components but excluding many graphical utilities like the finder AFAIK. How much can I actually build ...
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16 views

Linux kernel working only on kernel mode

Porting the Linux kernel to an architecture that has no execution modes (is always in kernel mode) and has no MMUs seems like a very unprotected system. Would it be possible to make Linux run in that ...
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20 views

Kernel task memory is not released in Mac OS X 10.10 (Yosemite)

I was working on a large Illustrator project in Mac OS X 10.10 (Yosemite) which takes up 4.5GB+ memory but after I save and quit the application, my kernel task has still 4.8GB in it and not being ...
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1answer
16 views

Signing Error during kernel compilation

I was trying to compile kernel on my system by following this link http://www.ramkitech.com/2012/04/how-to-compile-kernel-step-by-step.html when I run make command, I am getting the following error ...
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27 views

kernel_task cpu usage 300% plus long press power button to start Mac Air

I'm having Mac Air 13inch 2014 having 4 gb memory and 120 gb Hard disk , from the few days i have been facing a problem that kernel_task is taking 300% of my cpu and my mac is running very slow and ...
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1answer
57 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 ...
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1answer
44 views

Kernel Data Inpage Error

I started getting this "BSOD" error a few weeks ago, and I have no idea how to find out why... It happens at random times and events so I have no idea what's causing it. I did a google search a few ...
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121 views

Opensuse 13.2 kernel upgrade to stable version (4.1)

I have opensuse 13.2, and i try to upgrade kernel to last stable version. I adding http://download.opensuse.org/repositories/Kernel:/stable/standard/ to repository and try to upgrade with sudo ...
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45 views

Where to get the kernel source directory Kali Linux

This is a branch off of this question: Installing new driver on Linux, missing the 'Build' directory Since the PC has no internet I can not use apt-get to rebuild the kernel and get the ...
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21 views

Test program to configure MPLS datapath in Latest Kernel 4.1.3

Latest Kernel supports MPLS datapath in kernel, However there is no test program, or any guide how to write user space program to configure a MPLS datapath in kernel. I browse the kernel code and ...
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1answer
59 views

Kali Linux will not boot from USB, terminal asks for kernel image

I have been trying to boot Kali Linux from a USB. I have turned the USB bootable with the newest 64 bit Kali ISO and Universal USB Creator or whatever it was called, and it seems to have worked just ...
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0answers
22 views

ethtool or mii-tool support for kernel 2.6.24

I have a embedded system that has kernel version 2.6.24. I want to use ethtool or mii-tool in this system. I cross compiled ethtool package for powerpc mpc8250 cpu. when i use ethtool, I get ...
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0answers
23 views

Copy On Write will stop working with Docker?

I have been using Docker with great pleasure, but there is a question that concerns me and for what I have found not explanations on the Web. In a "normal" GNU-Linux server, executing different ...
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1answer
20 views

I need to calculate time of booting RPI using Watchdog? Can any one help me please

The boot sequence of the Raspberry Pi is basically this: Stage 1 boot is in the on-chip ROM. Loads Stage 2 in the L2 cache Stage 2 is bootcode.bin. Enables SDRAM and loads Stage 3 Stage 3 is ...
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0answers
49 views

OSX 10.9.5 running very slow

I have Macbook Air having Memory 4 Gb and Intel i5 Processor, it is running very slow as no application is opening and if it opens it freezes and its very hard to work over it , I check the Activity ...
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1answer
166 views

Mac hangs indefinitely at shutdown

When I reboot my mac running Yosemite, all the applications will quit, the desktop icons disappear, but then the computer hangs indefinitely. The desktop background and dock are still visible and the ...
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1answer
100 views

Is it possible to run 64bit kernel on 32bit Linux Mint with NVIDIA drivers?

I have found several forum posts and SE questions (example) where this seems possible, but my attempt has failed. I've tried the following: sudo dpkg --add-architecture amd64 sudo apt-get update sudo ...
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1answer
440 views

High CPU - NT Kernel & System, Windows 8.1 Pro 64-bit

I have 64-bit Windows 8.1 Pro, Lenovo X220. All updates are installed (both Windows and from Lenovo Solution Center). Every time my computer starts, one of the processes uses 25% of CPU (until ...
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0answers
19 views

Of how mutch importance is it to distinguish between subsystem and subsystem/kernel pair

There is no system but GNU and Linux is one of its kernels It is possible to have a kernel with different subsystems and a subsystem running on different kernels. Some real life examples ...
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90 views

how to fix kernel_task process cpu overflow on Macbook Pro 15inch late 2012

I have a Macbook Pro 15 inch Quadcore 2.6GHZ 1TB SSD, 16GB Ram and Nivida GPU. Lately it crawls to a halt so often because the kernel_task process will eat up to 500% of CPU, even when I'm just on ...
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36 views

Kernel parameter to set framebuffer resolution

What is the parameter to set framebuffer resolution (1920x1080)? With a nouveau driver I didn't have problem with it - now I'm using nvidia (non-free)
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61 views

USB drive not getting recognized as scsi device in custom linux kernel

I am facing a slow write speed problem with a USB drive in my custom linux kernel. I suspected to be a hardware problem but with the same hardware and Opensuse 12.1 OS, write speed of my USB drive is ...
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26 views

Why does my computer freeze randomly and also power button not respond? [duplicate]

My computer has this serious problem, I turn on the computer and after a random time lapse, it freeze and also the powerbutton not respond, the only thing that works is the reset button (the one that ...
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21 views

How do I run a patched linux kernel on Arch, using LVM on LUKS

I'm running LVM on LUKS on a Dell XPS 13 (2015 version). I'd like to run the patched linux-xps13-alt kernel which fixes some issues with this system. I have built & installed the linux-xps13-alt ...
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1answer
209 views

Fedora 21 Sound stopped working when installing the 4.0.4 kernel

Today I did a yum update as part of my attempts to get my qemu-kvm vm up and running. It appears to have had a side effect I didn't anticipate. Other than qemu itself, the only other thing that ...
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220 views

Rollback Kernel Ubuntu 14.04.2

I have looked at many answers on here but no matter what it doesn't seem to work. Fresh install of Ubuntu 14.04.2, trying to install an older kernel. I only have SSH access no GUI etc. What i have ...
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34 views

Embed initramfs into existing kernel

Is it possible to embed an initramfs image into existing kernel without recompiling the whole thing? I don't have resources to do that.
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1answer
166 views

What extras do I need to maximise battery life on a Linux laptop? (And how to stay current) [closed]

Now, I know that this question has probably been asked 1000 times - but as far as I can tell, the answer seems to change a lot over time. While researching, I came across powertop, pm-utils, tlp, ...
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11 views

Alternative of arch_fast_hash in Linux kernel v3.19 and above

To find the hash value of a given buffer, I used arch_fast_hash function present in Linux kernel v3.16 declared in include/linux/hash.h and defined in linux/lib/hash.c. But in Linux kernel v3.19, ...
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1answer
161 views

Who's crashing my kernel?

Symptoms Suddenly, a message saying "A problem in the kernel package has been detected" started appearing after I login upon boot. A new message is shown every second, incessantly (translation ...
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2answers
292 views

Android ADB Shell sendevent Not Working

I want to simulate pressing the power button on a rooted Samsung Galaxy Tab 2 GT-P5100 running Android 4.0.4 using the ADB shell. To do this I changed the relevant permissions using: adb shell su ...
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39 views

how to download and install outdated linux-headers

I just watched the issue concerning how to add additional driver (module) into pre-compiled kernel; I tried to install the linux-headers but in the current repository I could find that all the ...
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0answers
108 views

crypto kernel module not avialable on linux 3.18.11 on Raspberry Pi 2

I'm trying to use dm-crypt on my Raspberry Pi 2 with Raspbian (debian) to open a trueCrypt volume, but i get Required kernel crypto interface not available. Ensure you have algif_skcipher kernel ...
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2answers
770 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 ...
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3answers
138 views

Compiling Linux kernel to boot from a 1.44MB floppy disk [closed]

I want to compile the linux kernel (for use in a floppy linux minimalistic linux distro, which I am trying to make), but how am I going to do this in order to be fitted on a 1,44 floppy disk? I have ...
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0answers
52 views

How to change the Delayed Acknowledgement timer? (14.04)

I am trying to set different values for the timer of the Delayed Acknowledgement and see the different behaviors at packet level. I expected this to be a kernel level option but I can't locate ...
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0answers
546 views

OS X Yosemite coreaudiod, identityservicesd and com.apple.geod not responding

Has anyone on here found a comprehensive solution to the problem where coreaudiod is constantly not responding? I also have identityservicesd and com.apple.geod not responding, all the time: every ...
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0answers
44 views

How to install perf for my custom build kernel (4.0.0). Updated from 3.2.66

I tried building it from source and installing it. Well, it works fine but gives many warnings. What i could be missing.? I checked if these shared libraries exits and yeah they all exist in ...
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0answers
137 views

Kernel Panic when trying to boot Linux Mint 17.1

Ok, I just installed Linux Mint 17.1 (Cinnamon Edition, 32 Bit) alongside Windows 8.1, and when I select linux mint, It goes to the shell boot and the caps lock light flashes, indicating Kernel Panic. ...
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1answer
44 views

Kernel Thread that won't exit, Load Average +1

So I have a new server that is up and running with Centos 6, and the load average is stuck hovering around 1, even when the machine is nearly idle. I reviewed the process table and found this ...
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0answers
38 views

Broken boot-splash arch linux

Does anyone know why systems sometimes make broken images on boot? I had same problem when I've upgraded my kernel on Ubuntu. Now this problem appears on my Arch laptop as well (fresh install and ...
1
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1answer
308 views

How to increase the Kernel memory

I have two Windows Server 2008 R2 machines with the same spec (24G RAM). However, the Kernel memory is quite different: machine 1 has 206M of paged kernel memory and 168M nonpaged. Machine 2 has 998M ...
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13 views

How can I debug OSX memory card events

I am trying to get kernel messages for memory card insertion - removal, but i don't get logs. I issue the command "tail -f /var/log/kernel.log" So i need to know how to increase kernel log level to ...
2
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0answers
307 views

Windows 8.1 64bit Kernel-Power 137 Error

I'm at the moment encountering a problem with my windows 8.1 64bit Version. Some days ago I realised that it takes longer than usual to start the computer or wake it up, in fact, the computer seems ...
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1answer
309 views

Broadcom 4360 wireless setup w/ Ubuntu 14.10

I am attempting to set up my wireless adapter, but I can't seem to get the drivers installed properly. OS: Ubuntu 14.10 Motherboard: ASUS X99-Deluxe (wireless adapter is embedded) Adapter: Broadcom ...
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0answers
7 views

Recompile kernel to add user process kick confirmation

my apologies if this has already been asked. This is a combination development/admin/security question. My apologies if this question is being asked in the wrong forum. On Windows platforms, even ...
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2answers
40 views

What does it mean when a kernel terminates a process with status 131?

I am trying to debug an issue where a redis-server process died, and in the syslog I see: Mar 9 23:56:44 ip-10-236-158-228 kernel: [25188369.962457] init: redis1-server main process (2822) ...
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42 views

Where to copy kernel source after kernel is compiled from sources?

On my linux box (Mint 17.1) I compiled the kernel from sources so that I could enable certain things that are not there by default. The kernel compiled fine and the system boots/works just fine. ...