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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KMS, linux kernel 3.7 and ati mobility radeon x1350

I got problem with booting new kernel. If I on bootloader pass nomodeset flag to the kernel linux boots up successfully but it doesnt load radeon module to kernel which is really frustrating cause I ...
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1answer
2k views

Linux kernel scheduler for a pen drive - noop or deadline?

I run Debian Live as a persistent system on a 16 GB pen drive. This is my workhorse every day system. I was earlier plagued with continual delays and freezes due to slow write speeds. I have ...
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1answer
162 views

Linux Redhat kernel source installation? [closed]

I downloaded my kernel source rpm version, uname -a, from the ftp.redhat.com site. When I installed the rpm it put it in ~rpmbuild. In the past didn't it put it in /usr/src/redhat? Did this change? ...
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384 views

How to find whether setcap is supported in Linux

I have a libpcap based application. Now, to allow non-root users to use my app, during installation , i use setcap setcap cap_net_raw=ep /bin/myapp But, in case the Linux Distro on which i install ...
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1answer
100 views

How is battery charge reported to the operating system?

This feels like a stack exchange EE question, but it seems like it belongs here instead. How is the charge of a notebook computer's battery reported to the operating system? Since all laptop ...
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97 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 ...
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2answers
170 views

How can I run a command on disk error?

System: Debian Squeeze What's it for: A System where any new disk is DoD Wiped. I'm looking for a method to fire a command on a disk error that the kernel throws, sometimes we get bad disks and it ...
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1answer
325 views

Difference between gnu and darwin and mach

These terms belong to the Mac OS X architecture topic and I'm confused about the following: mach is said to be a microkernel Darwin and XNU are mentioned to be a kernel So ...can you help me to ...
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2answers
75 views

Library functions are always implemented using system calls?

We know that system calls are requests by a process for a service from an operating system's kernel.[1] I'm asking this question because I wanted to know if a process can really generate a signal on ...
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1answer
58 views

Signals: Kernel-generated only?

Can processes really "generate" signals or they just request the kernel to send the signal on their behalf? And what about hardware interrupts? Do they get translated to software interrupts? Like, ...
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4answers
198 views

Does the kernel process need to save something when switching to user mode? [closed]

According to my professor, "while switching from user mode to kernel mode, the status of the user process has to be saved completely. But when switching from kernel mode to user mode, nothing has ...
2
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1answer
1k views

dracut Warning: Unable to process initqueue

I'm on Mageia2 x86_64 with kernel 3.3.8-desktop-2.mga2. The kernel boot normally. My laptop is old so i need the old kernel for better compatibility and functionality. The problem is that the old ...
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1answer
194 views

Can I safely apt get remove a kernel that I apt-get-install'ed?

I installed a pae kernel on my Ubuntu 12.04 32-bit box in order to try it (I thought I would add RAM to my computer which I finaly didn't). It automatically added an entry to grub's boot menu with ...
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3answers
1k views

Where can I get a Linux distro iso based on a 2.4 kernel?

I need to get my hands on an ISO file for a Linux distribution with a 2.4 kernel. I'm looking for an ISO specifically so I can use it with my Oracle VirtualBox. Since 2.4 is so old these days, I'll ...
2
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1answer
170 views

V4L2 and ALSA: Kernel SPI or User API?

I'm trying to understand what Video for linux and ALSA are (exactly), and I can't discern whether they're APIs for Linux application to use (the userspace) or if they are backend services that are ...
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1answer
218 views

How to resolve conflict in iptable rules

In Ubuntu 12.04 and above there are no iptable rules defined by default. I added the following rule and it works fine:(Update) iptables -A INPUT -p tcp -j QUEUE -m string --string xyz --algo bm ...
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0answers
291 views

USB Mass storage driver as CDROM in Windows & MAC

I am in the process of enumerating a Hybrid ISO image which will show up as CDROM in Windows & MAC and encountered with the following problem. Hybrid ISO image is created with the following ...
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2answers
729 views

System.exe explanation

I see a process in task manager called "System", and I couldn't find any kind of relevant explanation about it on the net. Task manager shows its description to be "NT Kernel & System". Could ...
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1answer
505 views

Update single kernel module / driver

I needed a newer version of a Kernel module in an quite old kernel. How can I replace a single kernel module of the mainstream linux kernel and compile only this module?
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1answer
16k views

Windows 8 disk errors

So yesterday, I forcibly restarted my Windows 8 PC. VMWare Workstation was having some trouble with the guest Linux Mint OS. It wasn't responding for some time, so I tried suspending it September 28th ...
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1answer
342 views

FreeBSD sysctl.conf kernel.panic parametr?

There is a kernel.panic param in Linux's /etc/sysctl.conf to auto-reboot the OS when the kernel crashes. Is there anything like this in FreeBSD?
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1answer
322 views

Where and How should a Kernel Panic be reported?

I've Archlinux installed on my laptop Fujitsu Amilo Pi 2*** and I cannot find any log at /var/log that has the StackTrace. The Kernel panics ALWAYS when I try to modify screen brightness. Where are ...
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1answer
749 views

IPV4 route cache removed from >= 3.6 linux kernel

While going through 3.6 linux kernel change log, i came a across a mail (http://article.gmane.org/gmane.linux.network/238256) from David S Miller regarding removal of routing cache for IPV4 in kernel. ...
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1answer
3k views

how to bring network up at boot time in linux

I am working on an embedded linux system, my aim is to activate ethernet interface at boot time. I am using u-boot as bootloader. I passed ip= and eth= u-boot environment variables to the linux kernel ...
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1answer
148 views

Raid system fails to boot after moving from 2.6 kernel to 3.5

I'm running Gentoo Linux with a custom compiled kernel and I've just migrated from a 2.6 kernel to a 3.5. As my HD's are on RAID 0 mode I use a custom initrd file in order to be able to boot. While ...
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1answer
1k views

What version of compat-wireless do I need to install?

I have Ubuntu 12.04.1: 3.2.0-31-generic-pae Wich version of compat-wireless do I need to install? This is the page: http://wireless.kernel.org/en/users/Download/stable/ The question is: do I just ...
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1answer
207 views

Does FreeBSD 9.0 installs with multi-core support by default?

Planning to install FreeBSD 9.0-RELEASE amd64. Should I re-compile kernel after installation for multiple CPU cores support? or SMP-kernel comes in default installation?
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1answer
148 views

Multiple interface issue

We have an externally-accessible subnet on which all our desktops and a few servers sit. Due to a lack of IPs, we put the servers (which don't need to be externally accessible) on a private subnet and ...
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3answers
891 views

Updating Debian kernel

I'm trying to update my Debian machine to 2.6.32-46 (which is the new stable). However, after doing apt-get update my apt-cache search linux-image shows me: linux-headers-2.6.32-5-486 - Header files ...
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1answer
74 views

Is it safe to install kernel packages as dependencies on a Linode?

I'm working on a Linode: [michael@ads_portals ~]$ uname -r 3.5.2-linode45 I need to install some libraries, such as PyQt4-devel: sudo yum install PyQt4-devel Unfortunately, this comes up in the ...
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1answer
292 views

“make xconfig” with arch linux

I'm trying to compile a kernel for Arch. I'm using "arch method" - abs, edit PKGBUILD and then "makepkg". Problem is, my Arch is using xfce 4 + gnome 2, but i want to edit my config file using ...
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0answers
605 views

SELinux issues when adding rules

On my laptop I use Fedora 17 distro for the first time and I'm having some issues adding rules to semodule An example: # grep httpd /var/log/audit/audit.log | audit2allow -M mypol # semodule -i ...
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1answer
875 views

How can I get the number of threads running in a process from /proc/[pid]/stat in Linux?

I have the pid of the process. I would like to know the current number of thread running in the process. I know I can read /proc/pid/stat for this information, but I'm not sure how to specifically get ...
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1answer
556 views

Should I compile the latest stable linux kernel (3.5.4) for CentOS? [closed]

I am tasked with compiling a newer version of the Linux kernel that what is currently running on this CentOS 6.3 system. My instructions were to get a new kernel from kernel.org, but I was told that ...
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2answers
11k views

Missing linux headers during ATI driver installation

I've updated the kernel on my Linux Mint following this tutorial. But now, when I try to install the latest fglrx, I'm getting this error: Check if system has the tools required for installation. ...
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0answers
199 views

Kernel tuning on Linux [closed]

I have heard about using operating systems where they "tune" the kernel. If they are bypassing the kernel, do they need to tune the kernel? Is it a case of they do both because whilst the network ...
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1answer
1k views

Kernel Panic - not syncing: VFS: Unable to mount root fs on unknown-bloc(8,2)

I am a spanish speaker so excuse me for my bad english. I am learning how to compile slackware kernel, so I have downloaded linux-3.2.7.tar.bz2 from http://www.kernel.org Conditions: Slackware ...
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1answer
1k views

ALSA does not find sound devices as user but can as root after kernel upgrade

Using Archlinux with x86_64 after kernel upgrade to 3.5.3-1, there is no sound, and ALSA run as user shows no sound devices. The proper kernel modules are loaded, and both dmesg.log and lspci show ...
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228 views

Linux Sound Drivers - Recompiling kernel with ehcd-hcd module

I just installed Linux Mint and I am trying to get my usb soundcard to work. I am completely new to Linux so I have only been learning about all the important parts of the OS this afternoon. No one I ...
0
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1answer
135 views

in which kernel version CONFIG_IP_NF_MATCH_OWNER appears?

In which kernel version CONFIG_IP_NF_MATCH_OWNER key appears? I dont see it while make mennuconfig on 3.2.28 that I am trying to compile for my ubuntu 12.04 (3.2.0 - default kernel version).
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2answers
201 views

Boot windows 7 from a disk image of custom format

Windows 7 has an ability to boot from alternative sources besides plain disk partitions - for example it can boot natively from VHD or WIM. Is the handling of above mentioned formats hardcoded into ...
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2answers
1k views

Fedora Repository for older Linux Kernel versions

I'm using VMware Workstation 8 on Fedora. After every Kernel update, VMware can't rebuild its modules, so a patch is necessary. However, the last patch causes VMware to panic when a virtual machine is ...
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0answers
243 views

How to find out the available (and used) user resources?

With ulimit, we can find out how many open files, running processes etc. at most the user can have at the same time. My question is: how can we find out how much of these limits are being used and how ...
0
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1answer
261 views

How can I have a simple commandline based OS?

I have an Cortex A8 based development board, I would like to setup a simple OS, for example to connect through SSH to the board and upload/write new program(blink led etc). The board comes with a CD ...
1
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1answer
54 views

Swapping laptops while keeping current systems (kernel)

I am going to be getting a new laptop from HP soon, due to a faulty part, and they are giving my an upgrade. Almost all of the specifications will be changing, but I'm not keen on reinstalling my ...
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2answers
3k views

How do I compress a vmlinux kernel into vmlinuz?

The question is pretty much summed up by the title - I've just built a kernel which has generated the vmlinux output file. How do I compress this into a vmlinuz image?
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1answer
2k views

Mac - per-kext memory extension, aka which kext is leaky?

I am having trouble with some of the kernel extensions I am running as after a day or two of use, the memory usage of kernel_task grows to 1.2GB and stays there all the time. The problem is that I ...
3
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1answer
293 views

What is the significance of — in kernel parameters?

I've been customising some kernel parameters and notice that on some guides it has something like initrd=/blahblah.gz -- quiet and others only have initrd=/blahblah.gz quiet I've tried both and ...
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1answer
809 views

What kernel does Windows use? [closed]

XNU for OSX, Linux for Linux Distros. What is the name of the kernel that Windows use? (Don't tell me it uses "Windows Kernel")
2
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1answer
610 views

find kernel config option in menuconfig

I've upgraded my gentoo-sources today to 3.3.8, and now I am looking at diff between old kernel's defconfig and old kernel's .config: there are about 20 changes. I want to apply this changes manually ...