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Forum: Kernel

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

  1. TCP failover doesn't work as expected

    Hi community. I don't know if this mailing list is still alive, but will try to find answers here. I'm trying to build up a tcp failover...

    Started by zenichev, 03-20-2018
    • Replies: 0
    • Views: 24,628
    03-20-2018 Go to last post
  2. wpa supplicant is not able to receive the wireless events(IWEVASSOCRES

    I am facing problem with wireless events where the supplicant is not able to receive the wireless event(Assoc response IE) sent by driver. This...

    Started by RiaPolly, 02-27-2018
    • Replies: 0
    • Views: 3,392
    02-27-2018 Go to last post
  3. Question "sched_min_granularity" for CFS scheduler.

    Hello, on check_preempt_tick() function, normally, "sysctl_sched_min_granularity" can guarantee the minimal execution slice (lower limit) for...

    Started by Jerome., 02-21-2018
    • Replies: 0
    • Views: 1,673
    02-21-2018 Go to last post
  4. Does every call to write sends switches to kernel mode?

    I know that a call to the glibc "write" function calls in it's turn to the sys_call write function which is a kernel function. because sys_call is a...

    Started by dvirginz, 02-06-2018
    • Replies: 0
    • Views: 1,931
    02-06-2018 Go to last post
  5. Changing tcp behavior

    Hello everyone. I want to force TCP to send segments with smaller size like 800 Bytes instead of 1460 Bytes (Current MSS). I was investigating...

    Started by boolean, 02-04-2018
    • Replies: 0
    • Views: 1,671
    02-04-2018 Go to last post
  6. When using Transcendent Memory, what exactly happens on a FLUSH?

    Hello, all. I have some questions about the implementation of transcendent memory in the kernel, specifically in its frontswap mode. The...

    Started by polypocket, 11-15-2017
    • Replies: 0
    • Views: 4,618
    11-15-2017 Go to last post
  7. 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: 1
    • Views: 3,462
    10-25-2017 Go to last post
  8. Unhappy Replace keyboard driver with character device

    Hi All, I had to create a character device which I have already done, and now I need to replace it for keyboard driver but I don't know how to...

    Started by HPATEL, 10-02-2017
    • Replies: 0
    • Views: 2,261
    10-02-2017 Go to last post
  9. [SOLVED] Linux/x86 Kernel 4.3.0 - Kernel Configuration

    Hello, I have a Linux/x86 Kernel 4.3.0 with a ".config" in which network functionalities are disabled. Now, I would reintroduce them but I don't know...

    Started by davidepic91, 07-19-2017
    • Replies: 2
    • Views: 5,271
    07-19-2017 Go to last post
  10. Signing the packets with the application name

    When a linux application opens a socket to transfer packets I would like to intercept the socket call and insert the application name into these...

    Started by mraabs, 06-29-2017
    • Replies: 3
    • Views: 5,430
    07-05-2017 Go to last post
  11. TOS Field fetch from received packet on TCP socket in linux?

    I have a C++ network application running on linux using TCP sockets. I have been trying to fetch the DSCP marking from a received packet for TCP. We...

    Started by itismohit, 06-12-2017
    • Replies: 0
    • Views: 6,099
    06-12-2017 Go to last post
  12. UIO - custom version of uio_pci_generic

    I have stated the problem in the attachment

    Started by jNeddySeagoon, 06-10-2017
    • Replies: 1
    • Views: 2,504
    06-10-2017 Go to last post
  13. creating a shm file from kernel module

    I am trying to open a shm file for data sharing between kernel and user process. Below is my kernel module code. Sys log output indicates that no...

    Started by yaronshr, 06-06-2017
    • Replies: 0
    • Views: 2,783
    06-06-2017 Go to last post
  14. Is there a huge difference between 2.6 and latest version of kernel..?

    Is there a huge difference between 2.6 and current version of kernel..?? If yes please let me know because right now i am reading book "Linux kernal...

    Started by akshaypatil, 06-05-2017
    • Replies: 3
    • Views: 2,789
    06-05-2017 Go to last post
  15. Circular debugging using ptrace results in deadlock due to race condit

    Hi guys, As part of my personal research I am facing a challenging problem. I am trying to let two processes be each other's debuggers using the...

    Started by rusilja, 06-01-2017
    • Replies: 6
    • Views: 3,796
    06-02-2017 Go to last post
  16. I need help please!

    Ok i am pulling my hair out here i need some help. i and doing USB to SSL booting into recovery linux. I copied all of an image i made over to...

    Started by tjshadyluver, 06-01-2017
    • Replies: 1
    • Views: 2,330
    06-02-2017 Go to last post
  17. 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, 05-25-2017
    • Replies: 2
    • Views: 2,842
    05-30-2017 Go to last post
  18. 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, 05-29-2017
    • Replies: 0
    • Views: 2,020
    05-29-2017 Go to last post
  19. 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, 05-24-2017
    • Replies: 3
    • Views: 4,540
    05-25-2017 Go to last post
  20. 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, 05-18-2017
    • Replies: 0
    • Views: 2,805
    05-18-2017 Go to last post

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