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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Output of usbmon ( length field )?

In http://www.mjmwired.net/kernel/Documentation/usb/usbmon.txt#163 it is written that before status tag ,there is data length field ,in my output for usbmon http://pastebin.com/b6U7Je7h please ...
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1answer
22 views

How to use usbmon for knowing amount of data transferred from usb (pendrive )?

Please someone explain me in simple terms how to use usbmon to track the amount of data transferred from pendrive ?
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24 views

Debugging linux kernel, SIGKILL

Trying to debug linux kernel (vmlinux) with gdb during my education, but after I run kernel I just got "program terminated with SIGKILL": gdb vmlinux-3.11.0-12-generic ...GDB header... Reading ...
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1answer
73 views

Why is the System process using 40-60% of CPU power all the time?

TL;DR: ACPI.sys is constantly using lots of CPU power. Virus and malware scans all come back clean Drivers are up to date (GPU, Chipset, USB devices) Possibly important info: This install of ...
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1answer
25 views

How to add code into the linux kernel?

I am studying how to analyse and evaluate the TCP/IP protocol stack of Linux. My goal is to study the performance of the tcp/ip protocol stack as a whole, to study the time cost of each layer and ...
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0answers
20 views

Downgrade fedora 20 kernel

I want to downgrade fedora's 20 kernel (3.11) to version 2.6 because I have a package that only supports that kernel. I have looked everywhere for 2.6 kernel for fedora 20, but with no luck. If I try ...
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1answer
23 views

Custom kernel 2.6.18 compile in centos ends on fail

I'm compiling from RPM source. The same compile worked in the past but not this time. May be you can help me to solve this issue? make[2]: Leaving directory ...
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1answer
22 views

Remove i486 kernel (retain i686 kernel) after install

I'm repurposing an older 32-bit machine. After a Debian install, I have the following GRUb entries: Linux 3.2.0-4-486 Linux 3.2.0-4-686 I don't need the i486 kernel. I have been deleting the i486 ...
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0answers
18 views

Debugging not-loading Windows XP x64

The question is related to this one: Windows XP x64 hangs at welcome screen. So I want to debug WinLogon.exe through Windows Kernel-Debugger remotely using an 1394 (Fire Wire) port on the system asked ...
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0answers
21 views

Copy from Debian to mounted CIFS share hangs

I have a backup script run by a cron job on my Debian server. It creates a .tar.gz file from /home and copies it to a mounted CIFS share onto a Windows XP machine. It has been running without a ...
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0answers
18 views

Linux Mint won't poweroff, only reboots

I have a very strange problem with my Linux Mint. I'm using it on a lap HP455 and actually everything works fine except that when I have try to shut it down Linux will only reboot indefenitely. I've ...
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0answers
26 views

Apply binary patch to linux kernel image

I have a kernel image. The sources are somewhat lost and I dont want to migrate to a recent version (embeded software, custom (patched) linux kernel 2.4.24). I want to make a simple operation: ...
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0answers
16 views

Need To uncompress the initramfs file

I am new to this Linux Kernel and I am trying to boot a board from the usb and I was sucessfull Now My problem is the usb has two files a) initramfs.cpio.xz b) linux.img Now what I need to do ...
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0answers
25 views

Syslogd: hardware error

The machine has been sending these messages to the terminal, paired with beeps from the speaker on the motherboard. These messages appear every 5 minutes, sometimes naming CPU2, sometimes CPU3. ...
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0answers
69 views

Not enough host controller resources for new device state

I have a debian mint based system where I plug in 16 usb devices. The Kernal is: 3.11.0-12-generic After about 10 or so devices I start to experience problems with connecting new ones. There error ...
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0answers
27 views

OS X MCP_ELPG_VCORE_STS_SATA_POWERED_UP never reached! error

I'm using a macbook air and it keeps shutting itself down in the middle of usage and brings the following error Anonymous UUID: 3B35044A-64F2-3EA5-3C7B-5C908E62F2F6 Mon Mar 17 23:52:31 2014 ...
10
votes
4answers
2k 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 ...
2
votes
1answer
28 views

How to git clone specific linux kernel build

I know I can git clone the linux kernel using the following: git clone \ git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git \ linux-2.6 But I'm wondering how to clone a specific ...
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0answers
18 views

kernel module compilation error

C kernel module program, but not able to compile Error: make: Nothing to be done for `all'. my make file is given below: obj-m += hello.o KVERSION = $(shell uname -r) all: make -C ...
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1answer
25 views

In sysctl.conf settings, what is the difference between 'all' & 'default'?

In context of sysctl.conf settings, what is the difference between (all vs. default) like net.ipv4.conf.all.accept_source_route & net.ipv4.conf.default.accept_source_route in sysctl settings ? ...
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0answers
15 views

Linux: Keypresses missed when typed, possibly IRQ issues?

I have a strange behavior on a Raspberry Pi, running a buildroot'ed Linux kernel 3.13.5. When the system comes under a little load (eg. mpd is running in the background happily playing out some ...
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1answer
25 views

How to setup mainline kernel

I need to set up mainline kernel on my ubuntu machine. I went to the kernel.org and downloaded the the zip file and unzipped it. Now, I have the copy on my local machine. But how to keep it updated, ...
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2answers
134 views

What does the below sentence mean? [closed]

Windows CE is a distinct operating system and kernel, rather than a trimmed-down version of desktop Windows. — Wikipedia's Windows CE entry. The cited source for that sentence in Wikipedia is a ...
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0answers
43 views

My windows 7 keeps randomly freezing when I'm doing a variety of activitiess

The screen stays the same but goes unresponsive, and I get a loud ringing robotic sound through my headset. Log Name: System Source: Microsoft-Windows-Kernel-Power Date: ...
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1answer
23 views

How is system call executed [closed]

From the point of view of application programmer the system call is just invocation of a procedure from wrapper library. As I don't have good knowledge of assembly I was wondering how it is done on ...
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1answer
31 views

Ubuntu kernel upgrade after graphic card driver update

I use Ubuntu 12.04 with an ATI Radeon 5450 graphic card. I use 2 monitors, and I had to update the video driver because the default one doesn't remember its settings after reboot. I have found out ...
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1answer
55 views

Linux benchmark SSD vs HDD

I wonder if there is any performance difference when using SSD as the main Hard drive rather than mounting it to be used by different applications on the server. For example using a command line ...
0
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0answers
13 views

with rlwrap vi file edit not happening

Am using rlwrap,with that history fetch commands editing works fine. But in vi mode am not able to edit the file, and not able to exit from vi mode. I added following entries in inputrc, set ...
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0answers
91 views

how to resolve kernel_security_check_failure

I am trying to re-install my Nokia-E5 software by Nokia suite ,I have windows-8.1 OS on my laptop , I am getting this error kernel_security_check_failure . And my laptop restarts. I have no idea how ...
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votes
1answer
44 views

On telnet session file edit not happening using vi editor

I used rlwrap because with telnet session arrow keys were not working, after starting telnet session with rlwrap am not able to edit the file in using vi editor. Whether its problem with rlwrap.If i ...
1
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1answer
60 views

What is the rationale behind the default values for adjtimex --adjust?

The adjtimex utility has an --adjust mode that can be used to compare the system clock with the CMOS clock, calculate suggested values for the tick and frequency offset kernel time variables, and ...
1
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1answer
41 views

Questions about behaviour of running LiveCD Linux after unmounting a CD-ROM

Could anyone explain what happens in system after unplugging CD-ROM during working with LiveCD session? Suppose that I'm using Ubuntu LiveCD and suddenly by accident the CD-ROM disconnect for a ...
3
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1answer
799 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 ...
2
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1answer
57 views

Can a kernel that supports multi-core reduce cpu overhead, reduce cpu overheat

I found only a single core as identified by kernel from /proc/cpuinfo. Therefore I am installing a 686 pae kernel to identify all cores and get multi-core functionality. I read about how a process ...
2
votes
1answer
84 views

Ubuntu: change kernel order

How can I change the boot kernel order in Ubuntu server 13.10? grep menuentry /boot/grub/grub.cfg menuentry 'Ubuntu' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option ...
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2answers
201 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 ...
2
votes
2answers
457 views

Allow non-root process to bind to port 80 and 443?

Is it possible to tune a kernel parameter to allow a userland program to bind to port 80 and 443? The reason I ask is I think its foolish to allow a privileged process to open a socket and listen. ...
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0answers
71 views

System frequently hangs/freezes with all processes in D state

When I am browsing the web with chromium (with lots of tabs/images/etc.) or running virtual machines with kvm, occasionally (at least a few times a day) my system will suddenly become unresponsive for ...
0
votes
1answer
35 views

Strip Linux for a fixed-hardware system [duplicate]

Apologies if this is not the appropriate place to post! I am designing a minimal Linux system to test on an industrial PC. The ultimate goal is security. The hardware of the PC is known and will not ...
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1answer
80 views

Compile the kernel to increase the command line max length

Following up on http://stackoverflow.com/questions/14176089/system-command-line-max-length-in-perl, which say the max length for exec/command line arguments is controlled by ARG_MAX. So I want to ...
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0answers
537 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 ...
0
votes
0answers
34 views

Is it common to get error while kernel compilation?

I was just wondering if its normal getting error while compiling kernel with ubuntu 12.04. (i've already done 2.6.37.3 after solving few errors) Is there any kernel version which will be compiled ...
8
votes
1answer
158 views

Which files are cached by linux?

I understand that linux uses unused RAM to keep some files cached. But I wonder, which files it actually caches! If you take a look at free : Gesamt Belegt Frei Gemeinsam Puffer Cached Speicher: ...
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votes
1answer
97 views

Linux: Random kernel oops in mmap functions

For the last month or so I've been getting seemingly random kernel oopses. I've started to notice a pattern: from looking at the traces, the call trace always involves mmap functions. Whenever one of ...
0
votes
1answer
517 views

What does `apt-get install linux-headers-generic` do

Looking for explanation on apt-get install linux-headers-generic. What does installing linux-headers for a kernel do ? The significance of that command at the time of kernel installation and after a ...
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votes
2answers
119 views

How to add a new kernel entry in grub2?

Please anybody help me! I am building kernel from source code downloaded from http://kernel.org. I successfully built it and installed modules. Now i want that my kernel option should come at the ...
3
votes
2answers
98 views

Why will dmesg have message from user space?

you can use dmesg -u to see log from userspace. In my case, I have log from systemd and lvm. Why is this happening, why userspace program can print to kernel buffer ring?
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1answer
73 views

Dmesg boot dumps, udev and boot time

The following is my dmesg dump. [ 1.452016] udevd[121]: starting version 175 [ 1.522976] thermal LNXTHERM:00: registered as thermal_zone0 [ 1.522989] ACPI: Thermal Zone [THM] (76 C) [ ...
0
votes
0answers
20 views

Kernel logs and Boot logs

I am trying to analyse the logs of whats happening during boot. Grub config My GRUB_CMDLINE_LINUX_DEFAULT option in /etc/default/grub reads GRUB_CMDLINE_LINUX_DEFAULT= dmesg I have analyzed my ...
0
votes
2answers
59 views

How to understand this messages in /var/log/messages?

the messages is: Dec 18 10:08:55 localhost kernel: sdb: Current [descriptor]: sense key: Recovered Error Dec 18 10:08:55 localhost kernel: Add. Sense: ATA pass through information available Dec ...