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Forum: Kernel

Request help with Linux kernel compilation, theory, programming, or other kernel related issues

  1. V4L2 VIDIOC_S_FMT and VIDIOC_CROPCAP ioctl functions

    Hello Experts, I would like to know what VIDIOC_S_FMT is doing exactly ? Is it doing any scaling the images ? This question came to my mind once I...

    Started by titusece, 7 Hours Ago
    • Replies: 0
    • Views: 76
    7 Hours Ago Go to last post
  2. Idea to do "fake" wifi between local VMBox

    Hi I am the developper of Live Raizo, an Linux environment to experiment the system on simulated and real networks. LiveRaizo uses mainly...

    Started by Raizo62, 4 Days Ago
    • Replies: 1
    • Views: 285
    1 Day Ago Go to last post
  3. Generic Netlink unicast from kernel to user fails (-111)

    (Linux 4.4) I am trying to get a kernel module to send information to a user process over a Generic Netlink. It seems that the message is not...

    Started by yaronshr, 4 Days Ago
    • Replies: 3
    • Views: 408
    3 Days Ago Go to last post
  4. genl_register_ops/genl_register_family_with_ops v/v Linux 4.10+

    In setting up a Generic Netlink family in the kernel module, it used to be that you would register your commands with genl_register_ops. At a...

    Started by yaronshr, 1 Week Ago
    • Replies: 0
    • Views: 307
    1 Week Ago Go to last post
  5. Question vboxpci: IOMMU not found (not registered)

    I'm not sure if this is a kernel issue or OS issue (Ubuntu 16.04 64 bit) or a BIOS issue but I'll start here. IOMMU is enabled in the kernel and...

    Started by eelstrebor, 2 Weeks Ago
    • Replies: 5
    • Views: 346
    2 Weeks Ago Go to last post
  6. Adding custom info to TCP Header Options by changing Linux Kernel Source code

    Greetings, I am trying to add a custom information (of size 16-bytes) to TCP Header Options by changing the implementation of function...

    Started by abhishek_linuxforum, 08-27-2010
    • Replies: 1
    • Views: 4,066
    3 Weeks Ago Go to last post
  7. Interrupt kernel module when user process terminates/receives signal?

    I am working on a kernel module where I need to be "aware" that a given process has crashed. Right now my approach is to set up a periodic timer...

    Started by yaronshr, 04-10-2017
    • Replies: 1
    • Views: 2,833
    04-12-2017 Go to last post
  8. Spawning processes with display output from Linux kernel module

    I am trying to spawn a process from a kernel module, that has visual output - for now, I'm just trying to spawn xeyes. I am trying to do this using...

    Started by yaronshr, 03-29-2017
    • Replies: 1
    • Views: 1,047
    04-05-2017 Go to last post
  9. How to update a kernel?

    So I have this problem with the new kernel I'm using. It's 2.6.32-642.15.1.el6 for CentOS 6.7. Whenever I update my kernel, no matter what version...

    Started by edomingox, 04-04-2017
    • Replies: 1
    • Views: 313
    04-04-2017 Go to last post
  10. Drop pagecache from kernel space

    Hi there! I'm pretty new in kernel developing and but I have a problem to solve, maybe someone can help. (I apologize in advance for my...

    Started by just_paul, 03-30-2017
    • Replies: 1
    • Views: 1,580
    03-31-2017 Go to last post
  11. Why My Linux Booting In to Emergency Mode ?

    Hi, I have an appliance which is running FreeBSD. I wanted to boot WindRiver Linux when I reboot the appliance. There are more than one partition...

    Started by ajayss, 03-01-2017
    • Replies: 1
    • Views: 4,402
    03-07-2017 Go to last post
  12. Kernel Panic : Unable To Mount Root FS on Unknown Block (0,0)

    Hi, I have an appliance which is running FreeBSD. I wanted to boot WindRiver Linux when I reboot the appliance. There are more than one partition...

    Started by ajayss, 02-24-2017
    • Replies: 3
    • Views: 1,295
    03-07-2017 Go to last post
  13. Question Is there a Kobject associated to every sysfs directory

    Hi I would like to know whether all the sysfs directories are associated with a KObject. If so, Is there a way to get the KObject associated to...

    Started by akhilbaai, 02-23-2017
    • Replies: 0
    • Views: 679
    02-23-2017 Go to last post
  14. Kernel module level controls for mutual resource access?

    I know a little about semaphores and locks I am using for locking read and write operations to complete. However, for a specific hardware for a given...

    Started by pyzahl, 10-27-2016
    • Replies: 1
    • Views: 1,763
    02-22-2017 Go to last post
  15. The first Linux Kernel (linux-1.0)

    https://www.kernel.org/pub/linux/kernel/v1.0/ So. What to do with it? I kinda want to compile it, but i dont want to run linux-1.0 on my...

    Started by mindsword, 01-18-2017
    • Replies: 8
    • Views: 1,016
    02-21-2017 Go to last post
  16. Lightbulb Alternate working directory

    Please add an 'alternate working directory' link and make it accessible through '/proc/<pid>'. It should be initially set to the login directory and...

    Started by mtew, 01-17-2017
    • Replies: 7
    • Views: 1,887
    01-29-2017 Go to last post
  17. What do CAL interrupts do and is there a way to disable them?

    I am currently working on highly latency-sensitive software and I have a problem with interrupts. To make sure, processing is as fast as possible, I...

    Started by radschapur, 10-15-2016
    • Replies: 1
    • Views: 1,529
    01-13-2017 Go to last post
  18. Booting The Kernel

    Hello. I'm new in the forum and linux. I want to make my own simple OS. I want to run this OS on VM. But the VM says "No bootable medium found" What...

    Started by UygarKoc, 12-24-2016
    • Replies: 8
    • Views: 1,154
    12-26-2016 Go to last post
  19. usb_modeswitch unsccessful for MediaTek MT6225

    Hi, I am trying to do usb_mode-switch in my almond 3 router but it is not working.Its seems it is not finding the device ,the router is embed...

    Started by pankajcharpe, 12-15-2016
    • Replies: 0
    • Views: 632
    12-15-2016 Go to last post
  20. Question How Does Linux CFS Scheduler Define Domains and Groups?

    Hi Experts, I'm currently learning the source code of Linux kernel CFS. I know the load balancing is based on the schedule domains(sd) and...

    Started by simonwan, 10-11-2016
    • Replies: 0
    • Views: 615
    10-11-2016 Go to last post

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