Everything about UNIX kernels: development, configuration, compilation, design, etc.

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Install an app made for SUSE Enterprise 11 on openSUSE 11.4

I'm trying to see if I can install Symantec System Recovery 2011 Linux edition on an openSUSE 11.4 system. According to the docs, SSR 2011 for Linux supports (among others) SUSE Linux Enterprise ...
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471 views

How is the Linux kernel stack organised for ARM architecture?

Can any one explain how exactly linux kernel stack organisation is handled? When a child process is created using the fork() system call, how is the kernel stack space initialized?
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23 views

Dereferencing string pointer in ftrace event filter

I'm currently trying to create an ftrace event filter for the event sys_enter_open which is filtering by the filename argument. Looking at the format definition of it I can see there's a filename ...
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25 views

how to merge device tree overlays to a single .dtb at build time?

My board boots via U-Boot and AFAIK that bootloader does not support device tree overlays, so I'm probably forced to generate a single, static .dtb will all relevant overlays (and settings??) already ...
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29 views

dd process real vs. sys time

I have two quad core workstations. One is based on Intel Atom x86_64 architecture (WS1). Another one is based on armv7l architecture (WS2). Both are running 3.10 kernel version. Identical busybox dd ...
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24 views

How do I support PTRACE_O_SUSPEND_SECCOMP and PR_SET_MM_MAP?

I'm trying to make Criu work. However, when I run sudo criu check, it gives me this error: prctl: PR_SET_MM_MAP is not supported, which is required for restoring user namespaces Error ...
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49 views

Arch linux kernel upgrade from repositories

About two months ago I build a kernel (4.2.6-ARCH) from source according to this page, this is my current kernel version, the problem comes when I try to upgrade from the repositories, actually I did ...
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83 views

CentOS update from 7.1 to 7.2 with 2.6 OpenVZ kernel?

We are using CentOS 7.1: $ cat /etc/redhat-release CentOS Linux release 7.1.1503 (Core) We deferred the 7.2 upgrade. It looks like it did not cause any problems so we are planning an upgrade. The ...
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39 views

Unable to setup TL-WN722N or Unable to install/complete headers

I would like to set up the tl-wn722b WLAN Adapter. I have a Kali Linux version for a Raspberry Pi. I tried to follow this tutorial: ...
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22 views

How does GUI works different from the shell CLI?

For example if I want to remove a file I would write rm command in my shell CLI. But when I delete a file using GUI how does the process works ? For shell it would find the filesystem for rm program ...
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23 views

Problem with xv6 on qemu

I was doing the assignment on this link --> http://zoo.cs.yale.edu/classes/cs422/2013/lec/l2-hw After running make qemu the assignment document says A separate window should appear ...
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vmlinuz damaged

Hello everyone I am new here. I recently purchased Ubuntu 14.04 LTS DVD from a retailer store. Then I burned the iso into my pendrive and configured the file isolinux.cfg. The file was alright. ...
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81 views

How can I upgrade my debian kernel to 4.3.2?

I am experiencing wireless stability issues and I'd like to upgrade my debian kernel So I'd like to know how can I upgrade my current kernel to the latest stable kernel on kernel.org ? (4.3.2)
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23 views

QT application doesn't receive udp broadcast since linux kernel 3.13.0-70

I'm developing a QT application on Ubuntu and suddenly had problems because QT app doesn't receive UDP broadcast messages. They are visible in Wireshark on that machine, but never received in QT. ...
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181 views

Installing Linux onto Teclast X80H x86 tablet

I'm trying to install Linux (any linux, but preferrably Ubuntu Mate) onto my cheap tablet Teclast X80H, which came preinstalled with WIN8/Android x86. Main specs are: CPU: Intel Bay Trail, 1830 MHz, ...
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45 views

no bios, black screen on laptop after kernel upgrade and hibernation

I am running dual boot Windows 7 and Linux Mint 17.2 on an ASUS K56. I upgraded the kernel to 4.2 the other day. Reboot and everything worked just fine. Tested browser, music player etc. Then I leave ...
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15 views

Why number of dirty pages is always 0 on 2.6?

In /usr/src/linux/Documentation/filesystems/proc.txt i've found the string: Table 1-3: Contents of the statm files (as of 2.6.8-rc3) ...
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62 views

system user + kernel time using /proc/stat

user: normal processes executing in user mode nice: niced processes executing in user mode system: processes executing in kernel mode idle: twiddling thumbs iowait: waiting for I/O to complete irq: ...
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Problem while installing ReviewBoard on Oracle Linux 6.2

I am trying to installing ReviewBoard on Oracle Linux 6.2. For that first of all I have installed a epel-release-latest-6.noarch.rpm provided by Fedora. Then when I am trying to give command yum ...
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47 views

initramfs kernel panic!

I have seen this problem report a few times but the solution everyone posts is not seeming to work for me and I get the same issues Usage: switch_root [-c /dev/console] NEW_ROOT NEW_INIT [ARGS] ...
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133 views

CentOS installation of new kernel

I have a remote Server with OVH where they have their customized kernel which is causing us a problem while installing our software using CentOS 5.10 While applying the procedure to install the ...
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Where exactly is page permissions set in fs/binfmt_elf.c?

As I understand that in linux, the ELF loader (binfmt_elf.c) is the one that loads a particular binary into memory. Usually data will be RW and code segment will be RE. But where exactly in the source ...
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147 views

Kernel Panic - not syncing : Attempted to kill init

Cloning a hardware image using clonezilla at VM Workstation and getting the following error. I am able to boot the system using rescue CD , but don't know how to proceed.
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55 views

Run Linux kernel on Raspberry Pi together with Crosswalk

Is it possible to run the Linux kernel on a system like the RPi and have the Crosswalk runtime on it too. I would like to create an app that runs using Crosswalk on the RPi or any other sytem, but the ...
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332 views

Cpu and memory utilization is high in Aix

Hello everyone, I have problem with my CPU utilization I am using sar command to know my cpu idle % in that idle percentage is null and %sys %usr utilizing more, I am trying to check with ...
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46 views

lock_kernel declaration

I was trying to get usbip to work on my Mint netbook with Linux 3.2. The repo package doesn't have the require kernel module and the source won't compile. So I set off to fix it. I don't know the ...
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144 views

4.2 kernel build, missing version.h

I have installed a 4.2 vanilla kernel on Kali Linux 2.0 and prepared the kernel source with make clean prepare I then copied the source to the /usr/src/linux-4.2 directory. And this is symlinked to ...
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167 views

Kernel config for HP Stream 13 (booting from emmc disk)

I'm trying to install gentoo on hp stream 13 device and i am unable to boot up system from the emmc hard drive. Before trying gentoo on this device i have successfully installed debian, which clearly ...
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14 views

Recompile the kernel changing only one option

I've already built a custom kernel based on the mainline 4.1.6. Now I want to disable CONFIG_ACPI_I2C_OPREGION The kernel build is not very short, so I'd like to rebuild only the parts affected by a ...
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86 views

scripts/checkpatch.pl: Warning: consider using a completion

I'm currently writing a kernel driver that involves moving large amounts data from userspace to or from a peripheral, via a ring of bounce buffers. The buffer completion callback ups a semaphore, and ...
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59 views

Stack pointer of the interrupt stack

Linux kernel has separate stacks for user mode and kernel mode process and also some special stacks. One of this special stacks is interrupt stack with the size 16 kilobytes placed in the ...
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158 views

Error while trying to compile/install kernel, 4.1.6 on Ubuntu 15.04

I'm trying kernel compilation in Linux for the first time. I'm using the guide here to learn the basics. I'm able to pull the source code from the git repository, and can compile it. However, I run ...
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25 views

X stopped working after a kernel update

My system is a laptop with Ubuntu 14.04, with an Intel CPU and Intel + Nvidia GPU combo. After one automatic kernel update, the GUI stopped working. It shows a blue loading screen with a spinner, up ...
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33 views

How do I track down why my system is unstable?

I am experiencing a problem where I use Chrome on my X220 with CentOS 7 (kernel 3.10.0-229.el7.x86_64). It begins when I've been surfing Chrome for a bit and have a few tabs open. Chrome may just ...
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133 views

Status of UVC 1.5 support in Linux

My (Debian 8) kernel, 3.16.7 only detects the Logitech C930E webcam as UVC 1.0 (when it does support 1.5). Searching the Internet only throws up kernel patches, most of them from Pawel Osciak form ...
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111 views

Wifi driver on Kernel 4.x

I've upgrade my kernel from 3.19 to 4.1.5 but the Wifi driver don't work. Does anyone know how I can make it work? I've tried a few methods but it doesn't work. First method I've tried was to try ...
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59 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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195 views

grub2: error: /vmlinuz-3.16-ucs109-amd64.efi.signed has invalid signature

I am using a derivative of Debian, called Univention Corporate Server. It's a nice appliance that I use for my home server. Yesterday I upgraded to the newest version and since then my server does not ...
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286 views

How to change the console_loglevel in linux?

I read at multiple places (e.g. here http://elinux.org/Debugging_by_printing), that you can change the console log level by echoing an integer to /proc/sys/kernel/printk. If that worked shouldn't the ...
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74 views

64bit Linux Mint on Dual Core Pentium 4 machine

I have a HP 530 desktop with a 3200Mhz Dual Core P4 processor, 4GB RAM and 1TB Sata HDD. I'm setup with Dual Boot Windows 7 and Linux Mint 17. Although Windows 7 64 bit loaded fine, Linux Mint 17 64 ...
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168 views

I installed linux. And it doesn't recognize usb keyboard and mouse

When I boot computer with kernel 2.6, I can use usb keyboard and mouse. But If I use kernel 3.10, It doesn't work. / / kernel 2.6 $ lsusb Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 ...
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38 views

udev usb stick device list

We have 2 different yocto distributions: ARM Kernel 3.10.53 X86 SMP Kernel 3.10.0 If we add a USB stick to the ARM system we get different udev messages. usb/usb_device usb/use_interface ...
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How kernel will get control from u-boot in linux and who will un comnpress the image

I am basically Linux BSP. I want to know how u-boot will give control to kernel in android kernel or linux kernel. And how uImage will get uncompressed.
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28 views

grsec installer compilation error

I'm looking to install grsec to enhance the security of my Debian box. When I run the unofficial grsec installer (re: https://github.com/rickard2/grsecurity-Debian-Installer) that was written to ...
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148 views

How to prevent Apper from removing older kernels when updating (installonly_limit)

Fedora usually keeps 3 kernel versions installed by default, so a kernel update will remove the oldest kernel version installed. However, in some cases it may be necessary to keep all kernels. In ...
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SystemTap log output to file

I want to log output from my SystemTap script to a file. But when I try to use the -o option like: stap -r $PWD --remote user@hostname -o test.txt -S 1 ./test.stp I can't find the log file. If I ...
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40 views

How do I compile a custom Linux kernel to be optimized for Hadoop?

What can I do to configure a kernel to have resources that are optimized for Hadoop? I want to maximize the CPU and RAM availability for Hadoop. What can I remove from a traditional kernel if the ...
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784 views

“Illegal instruction (core dumped)” in __lll_lock_elision() for various programs after suspend with initramfs (Arch/Manjaro)

I am getting random "Illegal instruction (core dumped)" on various programs in my Arch Linux system, since I ran some system updates. The crashes are quite random. E.g. sometimes "git status" crashes ...
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52 views

How to debug freeze at start, output of syslog

Every now and then, my computer freezes while starting. I can see some "Oops" in /var/log/syslog, but from there I am not sure what to do to try and fix the problem. Jun 5 12:47:40 fulla kernel: [ ...
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99 views

Qemu Linux(kernel with debugging symbols) and ARM

I'm looking for a Linux ARM kernel, disk image and initrd that is compiled with debugging symbols. I'm looking to debug the kernel using the qemu and gdb. Could you point me to an arm linux image that ...