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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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 "$0" "$@" > ...
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0answers
6 views

tuffy can't get custom kernel to work, broken things USB2 radeon raid reiserfs

Please note that I've tried asking on linuxquestions but they had no clue, I also tried asking the kernel devs, but non of the free email services that I can find allows the bandwidth that would be ...
13
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2answers
11k views

How to diagnose ballooning OS X kernel_task and wired memory usage?

I have a very strange issue, which I'm having a hard time diagnosing as to the root cause. I have a Mac Pro (2008, 8-core 2.8 GHz, 8800GT) with 14 GB of RAM (recently upgraded because of this ...
2
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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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0answers
19 views

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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15 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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1answer
16 views

Linux kernel working only on kernel mode [on hold]

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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0answers
26 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
449 views

Telit modems on newer linux kernels are not recognised

I've Telit HE910 and HE910-v2 modems. After switching from 3.13-rc4 (sunxi branch) to mainline 3.17.2 I've got problems with 910. Before modem was set up properly: Jan 1 03:22:11 localhost kernel: ...
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0answers
125 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 ...
0
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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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2answers
296 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 ...
0
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1answer
28 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 ...
9
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5answers
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?
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1answer
64 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 ...
0
votes
1answer
47 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 ...
3
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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 ...
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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 ...
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6answers
5k views

Linux distro with just busybox and bash?

I just want a linux distro that boots fast, has a bash terminal (no gui) and busybox. Is there any such distro or is it hard to compile a kernel and just make one myself?
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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 ...
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0answers
42 views

How can I set sysfs.conf for EDAC kernel modules?

I want to set a parameter for the following EDAC settings files: /sys/module/edac_core/parameters/edac_mc_panic_on_ue /sys/module/edac_core/parameters/edac_pci_panic_on_pe But before I set any ...
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1answer
48 views

Linux-headers and images in Ubuntu after installing vmware-tools

Can I run a dist-upgrade for linux-headers and images in Ubuntu after installing vmware-tools? I ask this because I think vmware-tools also install something like a header and image which could be ...
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0answers
46 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 ...
0
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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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0answers
24 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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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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3answers
485 views

Does 'urandom' share the same entropy of 'random'?

Does the entropy pool /dev/random used the same to /dev/urandom? I want to mknod /dev/random 1 9 to replace the slow random, I think the current entropy is randomly enough, if urandom is based on ...
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1answer
61 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 ...
12
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3answers
8k views

how to know if noatime or relatime is default mount option in kernel?

I was trying to know if relatime or noatime was set on a filesystem, but i didn't found the information, neither in /etc/fstab, neither in kernel boot options. First of all, it seems clear that i ...
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0answers
23 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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2answers
3k views

How can I enable kernel crash dumps in Debian?

I want to enable kernel crash dumps for my Debian 5.0.7 machine. The kernel version is 2.2.26 amd64. How can I configure this?
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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
83 views

Console outputs kernel error AudioSysctl

Since Yosemite my console app logs this twice a second: kernel: AudioSysctl: (0) It's insane. Since I can't find anything about it in the internet, how would I try to get to the bottom of this (and ...
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2answers
627 views

Monitor /sys partition for changes

inotify doesnt work on /sys and /proc file systems. So how can I monitor a /sys partition file without polling?
5
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1answer
852 views

Stuck on GRUB command prompt after regular kernel update

I am running Debian Wheezy. Update Manager suggest to install kernel update. After update, I reboot system but instead of listing all the kernels (bootloader), it gave me a GRUB command prompt: ...
0
votes
1answer
172 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 ...
11
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4answers
7k views

Killing wininit.exe shuts down Windows

When I kill wininit.exe, Windows 7 suddenly shuts down. Can someone explain this using Windows mechanics? I feel like this might because the process provides something important, or this might be a ...
5
votes
3answers
10k views

Why Centos still not using Latest kernel

As i have seen many changes and improvement in kernel 3.xx The improvement i like is dmcache which introduced in kernel 3.9 I have 3 server with centos installed on all machine Centos is still ...
0
votes
1answer
463 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 ...
0
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0answers
21 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 ...
3
votes
1answer
366 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 ...
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0answers
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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0answers
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)
0
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0answers
62 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 ...
1
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0answers
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 ...
0
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0answers
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
210 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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1answer
171 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, ...
1
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0answers
35 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.