How to keep asm output from Linux kernel module build

I'm working on a Linux kernel module for a 2.6.x kernel and I need to view the assembly output, though it's currently being done as a temporary file an deleted afterwords. I'd like to have the...

Execute a program in kernel space in Linux

If I want to execute a user program (not a kernel module) in Linux kernel space, what options do I have? I have looked at KML(kernel mode linux) but that is specific to IA-32 architecture. I want...

Which context are softirq and tasklet in?

I know that there are process context and interrupt context but I don't understand when executing softirq or tasklet, which context is it run under. I have seen some people use the term...

Check for user = root within linux kernel?

I am writing linux kernel code. I am in VFS and I want to modify it. I want to add a check to see whether or not the user is root and based on that make a decision. How do I do this? Is there a...

Measuring Time in Linux Kernel Space With Sub-Microsecond Precision

I am currently using the do_gettimeofday() function to measure time in the kernel, which gives me microsecond precision. Is there anything available that is more precise than this (maybe on the...

using linux header files in visual studio

I was trying to use linux kernel header file on the visual studio 2013. I want to do this for auto completion purpose. I noticed that stdio.h file is inside of the C:\Program Files\Visual Studio...

"Will not add file alias 'samefile' ('SameFile' already exists in index)" when `git add` operation

I download linux' kernel source, and want to git add them all. When I git add ., git starts add them. But soon it returns an error: fatal: Will not add file alias...

Makefile:10: recipe for target 'modules' failed on multiple debian distros

FIXED The problem was that I had spaces somewhere in the path to my source directory. In this case, "Source Builds" had a space and screwed everything up. Make sure you don't have any spaces...

npm hangs on postinstall / unlock

I have a Linux server that runs some virtual Machines using KVM. Host machine is a Debian derivate with kernel 2.6.32-32(-pve). In roughly 75% of the times I run npm install, it hangs while...

How to get a file list from a directory inside the linux kernel?

I just saw there is a ROOT/directory before any rootfs (whether from initrd or form a disk) I already know it do contains /rootand/devwith a mounted devtmpfs (if CONFIG_DEVTMPFS_MOUNTis...

unable to build the 3.10 kernel with the lp?

Can you please give the steps to compile the linux 3.10 kernel with lp. I am porting the 3.10 kernel into the arndale board ie exynos with device tree. I created the defconfig by running ARCH=arm...

USB Touch Screen Input device not recognised

Added support for my LG 17MB15T USB Touch screen to hid-ids.h and hid-multitouch.c and recompiled kernel. Device is recognised in DMESG and claimed by hid-multitouch : <6>[ 307.451668] usb 3-1.6:...

RabbitMQ management API call failed: HTTP 500: Internal Server Error

I am using Celery Flower with RabbitMQ as message broker. However I am :getting nasty error ERROR - RabbitMQ management API call failed: HTTP 500: Internal Server Error every time I try to...

What exactly does Linux kernel's `make defconfig` do?

I can use the following command to create a Linux kernel .config file based on a specified architecture default for a custom ARM-based board: ARCH=arm make defconfig...

Linux gretap - net/ipv4/ip_gre.c - how to set value of key->tun_flags

I'm trying to transport over a gretap tunnel between two Linux (Centos 6) hosts some cloned IP pkts in order to feed an IDS style device. Given that PMTU discovery will not work on the cloned pkts...

MemoryError in TensorFlow; and "successful NUMA node read from SysFS had negative value (-1)" with xen

I am using tensor flow version : 0.12.1 Cuda tool set version is 8. lrwxrwxrwx 1 root root 19 May 28 17:27 cuda -> /usr/local/cuda-8.0 As documented here I have downloaded and installed...

Systemd Service status remains running even after ExecStart process not present in centos 7.3

I have created a systemd service like way any interruption triggered to running process then it has to restart itself. but service shows its status as running (Used systemctl status x.service)...

atomic context and process context/interrupt context

in Linux Device Driver3 and Understanding the Linux Kernel. Some buzzword appear many times without definition process context: referenced in both books, but no definitions interrupt context: ...

How do I fill out the iov_iter structure for use with msghdr?

I am trying to send a UDP packet from a driver using sock_sendmsg(). There are several guides on how to use sock_sendmsg() and msghdr to fill out at a UDP packet and transmit it, but they are all...

Performance Monitoring Counter (RDPMC) on a specific processor

I'm trying to use RDPMC Instruction for counting retired instructions and as Intel Software Developer's Manual Volume 3, Appendix A (In PERFORMANCE MONITORING section) mentioned: • Instructions...

Run Android Emulator - Segmentation Fault

I want to run android emulator on CentOS linux without GUI in headless mode. When running it, segmentation fault error occured. It seems that emulator is runnig only once after reboot system,...

Install Azure IoT Edge on Debian9

I'm going to install Azure IoT Edge along a procedure of URL in the following, but an error goes out and doesn't advance it first. Could you tell me the cause and a plan to...

Parallelization Of Insertion Sort With openMP, compared to serial version, gives very spiky results

Context Hello! I was finishing up a slight hands on experience with POSIX pthreads, and OpenMP, trying to compare the both with the serial implementation of Insertion Sort, trying to see which one...

Get userspace RBP register from kernel syscall

I am writing a kernel system call and I want to read the base pointer register (RBP) of the user. Maybe I can do that using the pt_regs struct that is passed for parameter, isn't it? Example...

Kernel driver not installed (rc=-1908) Getting Errors in macOS Big Sur 11.0.1

I just want to work with VirtualBox but now I am getting this type of error. I could not find a proper solution. Kernel driver not installed (rc=-1908) Make sure the kernel module has been loaded...

Building android kernel

since two weeks I try to build the kernel for my htc device. Getting the right sources is not the problem, but since gcc has been removed from toolchains it's a real nightmare. Following the...

How to launch android emulator with my own .img partitions?

I compiled my own AOSP image and got this: [email protected]:/mnt/android-dev-3/aosp/grapheneos-lz_experiments/out/target/product/generic_x86_64$ ls *.img cache.img ramdisk.img system.img ...

Slurm says drained Low RealMemory

I want to install slurm on localhost. I already installed slurm on similar machine, and it works fine, but on the other machine i got this: [email protected]:~/galaxy/tools/melanoma_tools$ sinfo...

Unable to retrieve version information from Elasticsearch nodes. Request timed out

I am installing Kibana and elasticsearch version 7.15.1 as per instructions mentioned in the link Install Kibana with Docker The commands I am using are docker network create elastic docker pull...