kernel

问题 I'm trying to debug an operating system that I am developing. When I start up the VM machine with VirtualBoxVM --startvm "X" --debug the VM starts paused, but when I execute the 'g' command to continue execution I get this error: g: error: The VM is already running But when I start my virtual machine without --debug , everything works fine, but I can't debug. Why does that error message appear? The VM starts stopped, so the message doesn't make sense and it doesn't allow me to debug my OS. 来源

问题 I have a piece of kernel module as the following, which tries to read msr register, no doubt it would crash as the msr 0x2 is not exist, a geneal protection fault will happens. My question is how could I bypass this fault, like define my GP handler? if I cannot read a msr, just let it go... The following is my module code: #include <linux/init.h> #include <linux/module.h> #define LBR 0x2 static unsigned long long x86_get_msr(int msr) { unsigned long msrl = -1, msrh = -1; /* NOTE: rdmsr is

问题 I have 2 Windows 2016 server VM, I have installed HLK Controller in 1 VM as told in the docs Step 1 https://docs.microsoft.com/en-us/windows-hardware/test/hlk/getstarted/step-1-install-controller-and-studio-on-the-test-server I installed HLK Client on second VM as shown in Step 2 of the same doc above But when i open HLK Studio in VM 1 I am not able to see VM 2 as test server in Configuration of HLK Studio. Please help me resolve this , I have tried everything told in troubleshoot doc nothing

问题 I cannot make DbgView.exe work properly on my Windows 10 64-bit v2004 Virtual Machine. The program doesn't capture any kernel message from the driver if using KdPrint, but works fine with DbgPrint. I've already tried "bcdedit /debug on", adding "Debug Print Filter" on the registry editor and rebooting, enabling verbose kernel output. I've also tried on my host machine, same outcome. It is a very simple driver, only to be loaded and unloaded, copied from the book Windows Kernel Programming.

问题 I found some function 'renice' that changes the nice value of process. But I want to know how to change priority in kernel code . Is it okay that just changing the priority value in sched_entity of process? 回答1: If you want to change the niceness of the process programmatically, I would advise against setting these values in the kernel struct directly. Instead, you can utilize several POSIX functions such as setpriority or pthread_setschedparam . The default scheduler policy on Linux is SCHED

问题 I found some function 'renice' that changes the nice value of process. But I want to know how to change priority in kernel code . Is it okay that just changing the priority value in sched_entity of process? 回答1: If you want to change the niceness of the process programmatically, I would advise against setting these values in the kernel struct directly. Instead, you can utilize several POSIX functions such as setpriority or pthread_setschedparam . The default scheduler policy on Linux is SCHED

问题 I am getting the warning (treated as error): Type Cast Pointer Truncation from HANDLE to ULONG When I try to compile, I understand that the type has a different length as I am compiling ARM64 rather than ARM, therefore I need to change the type or static_cast it, however I receive errors such as "expected (" when changing the line to something like this: return static_cast<ULONG>PsGetProcessId(current_process); //this gives me invalid conversion type as //there are no brackets around the

问题 I am planning to use virtual environment in jupyter notebook through the following steps: conda create -n test python==3.6 conda activate test ipython kernel install --user --name=test Then i get the following in return: Installed kernelspec test in C:\Users\User\AppData\Roaming\jupyter\kernels\test which seems to be working when I saw the test kernel appeared in jupyter notebook. However, when I switch to that kernel, it is actually using my default python enviroment. I also checked the

问题 Closed . This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 3 years ago . Improve this question I want to partition a data series using kernel density. Here is my plan: Using kernel density function (like density()) with variant window width to calculate the density of this series. On every kernel curve with different window width, I find all the turning points

问题 I'm trying to work with Wolfram Mathematica Kernel from Java Web Application using JBoss. Here is a Main Class. public class Main { static KernelLink ml; static KernelLink ml2; public Main(){ String path = "-linkmode launch -linkname 'C:/Program Files/Wolfram Research/Mathematica/9.0/MathKernel.exe'"; try { ml = MathLinkFactory.createKernelLink(path);// подключаем ядро ml.setComplexClass(MyComplex.class); System.out.println(ml.getComplexClass()); ml.discardAnswer(); ml.evaluate("<<hexagon.m")