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.

learn more… | top users | synonyms

0
votes
1answer
3k 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 ...
2
votes
1answer
4k 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 again....
0
votes
0answers
45 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 ...
9
votes
1answer
2k 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: ...
1
vote
1answer
610 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 ...
4
votes
1answer
8k 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 ...
0
votes
2answers
3k views

How to add a new kernel entry in grub2? [duplicate]

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
787 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?
0
votes
1answer
321 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) [ 1....
0
votes
2answers
455 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 ...
2
votes
1answer
72 views

Turn on out of memory killer

I am running ubuntu 13.04 and currently if any user accidently writes some code that uses too much RAM it brings the whole system down so badly I have to switch the power off and on again. Is there ...
0
votes
2answers
275 views

Unable to configure the Linux Kernel v3.8.9 source code

I'm running Linux Mint with kernel version 3.8.0-29-generic. So I downloaded and extracted the Linux Kernel 3.8.9 source code and placed the folder in the main directory. Now using the command make ...
4
votes
3answers
5k views

Logitech M560 mouse on linux sends messed up input events

My friend bought yesterday a Logitech M560 mouse (you can see it here) and tried it on her Ubuntu system. It seems to be a relatively new model, so there is no info about it anywhere, except for ...
0
votes
0answers
74 views

Can a driver be compiled alone instead of the whole linux kernel?

I made some changes to the serial driver on my linux machine. I've been trying to compile the module and reload it, but it throws some errors. Instead, if I recompile the whole kernel it works fine. ...
2
votes
1answer
2k views

Why are user level threads faster than kernel level threads?

I found out that user level threads are a lot faster than kernel level threads but I could not find any convincing example of WHY is user level threads are faster than kernel level threads ? Could ...
0
votes
4answers
110 views

How do I get the latest linux kernel, and why would I want to do that in the first place?

I'm running 3.10-3-686-pae, and I think I would like to upgrade to 3.12 just so I can learn more about how it all works. My computer runs pretty well considering how old it is. I have been learning to ...
3
votes
2answers
235 views

Will applications running in root mode be able to overwrite OS's or other program's memory section?

I read here that any application running in root mode can issue a kernel call and execute in kernel mode. Is is possible that ANY application running in root mode can make a kernel call, go to kernel ...
2
votes
2answers
393 views

Can linux kernel be installed alone without any other existing OS

Hi I am newbie to linux world. I have just downloaded the latest kernel from kernel.org. I want to install this simple kernel into my PC(my PC is formatted and has empty hdd). Can I do that? if so, ...
1
vote
0answers
7 views

How to approach searching for sources of interface unresponsiveness

On Debian Linux: On a relatively powerful machine I ran an update and both the kernel and the window manager got updated to newer version. At that point the machine become noticeably less responsive: ...
0
votes
1answer
98 views

Why is my Mac contacting Romania?

I just used Onyx to clean out my caches and log files after which I did a reboot. Browsing the "All Messages" panel of the Console app I noticed this line: 10/27/13 3:38:03.000 PM kernel: 5.106.198....
2
votes
1answer
290 views

How to make Linux reliably boot on multi-cpu machines?

I've got two machines, one with 4x12 AMD Opteron cores (AMD Opteron(tm) Processor 6176), one with 2x8 Xeon cores (HT disabled; Intel(R) Xeon(R) CPU E5-2660 0 @ 2.20GHz). On both machines I experience ...
2
votes
1answer
74 views

Which classes of drivers require an ABI bump for Windows 8.1?

I noticed that Windows 8.1 installed a lot of new drivers for several of my devices, but I don't know if that's because there was just an updated one available on Windows Update, or if the kernel ...
3
votes
4answers
427 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
3answers
94 views

Are linux driver support at kernel level?

Until now, I thought that linux drivers are at kernel level. That means, drivers are packed inside the kernel, so different distributions should support the same hardware as long as they run the same ...
4
votes
1answer
7k views

Problems with mounting HFS+ drives

I have a problem mounting some hfsplus drives. I just need them mounted readonly. (disabling journal is not an option) I did a lot of research and found out that due to changes from kernel version 2.6....
3
votes
1answer
57 views

On certain Linux boxes, variables in the stack seems to be initialized to 0 - why?

I have a buggy program that pushes a variable onto stack and may use it without initialization. I take the same binary and run it on different Linux boxes. Those boxes have different CPUs (i5, i7), ...
1
vote
0answers
145 views

linux + squashfs-tools for red-hat 5.3

I want to install the squashfs-tools-4.0-5.el6.i686.rpm But I have the following dependencies ( after RPM installation ) please advice what the additional packages that I need to install on my linux ...
0
votes
2answers
120 views

Why do linux kernels include files for all devices?

The kernel for my device includes so many files for other devices and situations that my device cannot use. The kernel carries around the files for everything and is much bigger than just the files ...
0
votes
1answer
307 views

Mouse stops moving after a every few seconds, but revives after click action

I am using Arch Linux and according to "uname -r" my Linux Kernel Version is 3.10.10-1-ARCH. This problem appeared after a full system update recently. Any idea how to fix this? Thanks in advance ...
2
votes
1answer
256 views

Linux kernel option to force video card to stay on

I just installed Debian Wheezy 7.1.0 on an Intel vPro System (Intel Core i5-2520M, SuperMicro MBD-X9SCV-Q-O). Intel AMT's KVM works perfectly until Debian has completed booting and shows the login ...
0
votes
1answer
71 views

Is the source code for OS X kernel logging messages available via XNU, or is it “proprietary.”

It would be kind of nice to understand just exactly WHAT all those messages that appear in log files really mean. I'm not necessarily talking about errors, but even informational messages. I realize ...
2
votes
2answers
2k views

Linux - prevent disks spinning up

On bootup all disks are spun up, but 4 are just backup (and pretty noisy too). Soo I'd rather prefer to never ever spin them up at all when booting. Is there a kernel option which tells the kernel ...
3
votes
1answer
911 views

Kernel bypass possible with non-specialised NIC?

Is it possible to perform kernel bypass and have a NIC send data to the user space (where I will write my network stack) with no copying, without having to purchase a specialised Solarflare etc NIC?
0
votes
2answers
230 views

Advantages / Disadvantages to rolling my own Linux kernel? [closed]

I was thinking about installing a fresh copy of Ubuntu on my main machine. Along with doing so I was thinking about rolling a mainline kernel to get all of the latest support for hardware and such ...
1
vote
1answer
727 views

trouble compiling linux kernel from source

I am trying to compile a kernel from the source tree found at https://github.com/fio-prf/em, and I am getting the following error when I run make: make[1]: Nothing to be done for `all'. make[1]: ...
0
votes
0answers
353 views

How do I configure fsnotify's queue size/watch limit on OSX?

Note: This might be a StackOverflow question, since it's about something that's only accessible via the internal API on OSX, but I'm posting it here since it seems to be more about using a tool that's ...
0
votes
0answers
28 views

When an image on an editing program is rendered on Windows, is the program parsing it, or is the kernel doing it?

so I know this question is confusing, but luckily I am a computer programmer and can make it more clear if you would help me out by reading on. A simple program, liek MS-Paint, will "know" how to ...
2
votes
4answers
17k 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
1answer
2k views

Configuring DRAM size when compiling an ARM (linux-sunxi) kernel for an allwinner a10 tablet

I've got a goclever a103 tablet (http://goclever.com/goclever_tab_a103) and I want to install linux on it to boot it from an SD card. First thing I found online were SD card images for a very similar ...
2
votes
1answer
3k views

DKMS fails to compile fglrx-driver on Debian Sid (using kernel-3.10-1)

My 'play' box (Debian Sid) just received an update for the kernel (3.10-1-amd64). Right after I installed appropriate linux headers I received an error from DKMS indicating failed build. Below is the ...
1
vote
2answers
130 views

File POSIX Capabilities

In Linux kernel v2.6.~ there was an option File POSIX Capabilities in kernel configuration, which, in particular, is necessary to build and use Linux Containers successfully. I'm currently using v3.9....
0
votes
1answer
648 views

Compiling Linux Kernel with headers (AMD FX Piledriver)

I have compiled Linux kernel 3.9.7 for my AMD FX 6300 (with AMD selected as processor vendor during kernel compilation). After the installation, I restarted the system, and found that the "linux-...
2
votes
1answer
59 views

PearOS - Is it actually Linux?

I just downloaded PearOS 7 for both its look and the fact that it was linux... Until I thought about it. PearOS is a distro that was made by a french developer. Does it use the kernel that say... ...
1
vote
1answer
2k views

How to compile and install new kernel in Chrubuntu with samsung exynos 5 (ARM coretex-A15)?

I have successfully installed Chrubuntu 13.04 (kernel version 3.4) on samsung Chromebook Exynos5 with ARM coretex-A15. And I also tried to update the kernel version to 3.9 by downloading new kernel, ...
3
votes
1answer
442 views

enabling CONFIG_LIBIPW on kernel compiling

I need to enable CONFIG_LIBIPW=m on kernel 3.4.0 I see that IPW2100, IPW2200, and PCI needs to be enabled, but I could not find any clue where they are on the menuconfig. I read on http://cateee.net/...
0
votes
1answer
105 views

What's the type of my Ubuntu kernel?

Four commands on my pc: $ dpkg -l |grep linux-image Linux kernel image for version 3.4.0 on 32 bit x86 SM It means my Ubuntu kernel is 32 bits? $ uname -a Linux ny 3.4.0-030400-generic #...
0
votes
1answer
79 views

How can a param be added to boot-command but not accepted by sysctl?

I can successfully add libata.ignore_hpa=1 to my boot command and the following cmd will yield a '1' upon boot: cat /sys/module/libata/parameters/ignore_hpa but grep'ing sysctl -a for libata and ...
2
votes
1answer
1k views

How to enable sched_compat_yield?

I am not able to see the sched_compat_yield entry under /proc/sys/kernel/. How to enable this propery in the kernel (so that I can tweak it for some debugging purpose) ? Currently Available Entries: ...
1
vote
1answer
512 views

How I can replace linux module which are the same version?

I have compat-wireless module, it's built and patched. I really need to replace the module located in /lib/modules/3.2.0-4-686-pae/kernel/drivers/net/wireless/ with this one but I don't know how do ...
1
vote
0answers
326 views

State of vanilla kernel support of RaspberryPi [closed]

What is the state of the support for RPi in vanilla kernel? What is holding back any possible merge from the forked RPi specific kernel repo back into the upstream? Is there any technical issue with ...