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Forum: Kernel

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

  1. Two modules in the same ko - Unknown Symbol?

    Hi, I'm making an external kernel module for a device that consists of a group of range finders. I would like to define this as a driver class and...

    Started by allsey87, 07-02-2015
    • Replies: 2
    • Views: 1,147
    09-10-2015 Go to last post
  2. Some questions about preempt_disable.

    when kernel boot time , after sched_init(); then here called : preempt_disable(); and the comment for the function : 542 /* 543 ...

    Started by redosun, 08-12-2015
    • Replies: 1
    • Views: 799
    09-10-2015 Go to last post
  3. Stop kernel when it access a certain memory address - KGDB/GDB

    Hello together, to find an annoying bug I have to know which functions will perform a write operation to a specific memory address. To achive...

    Started by ralf8519, 08-14-2015
    • Replies: 3
    • Views: 1,460
    09-10-2015 Go to last post
  4. asynchronous io to named pipe possible?

    I'm new to linux. I'm trying to create a named pipe server and named pipe clients. Ideally I was hoping to have the server use async IO to make...

    Started by nickdu, 08-06-2015
    • Replies: 7
    • Views: 1,693
    08-07-2015 Go to last post
  5. Query about Kernel memory placement!

    I am doing some research and wanted to know what is the location of kernel in the ram. Another question: how much portion of kernel in ram gets...

    Started by mkafridi, 07-22-2015
    • Replies: 5
    • Views: 1,144
    08-05-2015 Go to last post
  6. Question Hangs when booting after soft-reset (after hard-booting to GNU/Linux)

    Hello GNU/Linux experts. This is a dual booting (GRUB 2) UEFI 64-bit laptop. If I hard-boot (shut-down the computer and turn it on manually) to...

    Started by tauro_kpo, 06-21-2015
    2 Pages
    1 2
    • Replies: 13
    • Views: 2,254
    06-23-2015 Go to last post
  7. Difference between LTP and Autotest

    Which test framework to use for kernel and peripheral testing

    Started by hobbyist, 06-08-2015
    • Replies: 0
    • Views: 1,014
    06-08-2015 Go to last post
  8. SPI transfer chip select setup time

    Hi, 1. During SPI tranfer master->transfer(spi, message) is called in function __spi_async in spi.c file. I searched the file spi.c and all...

    Started by rajkumarmadhani, 06-06-2015
    • Replies: 1
    • Views: 747
    06-06-2015 Go to last post
  9. configure pagecache in kernel 3.19.1

    Hi, I need to set the page cache size to zero for my experiments. At many places on the internet it is referred to as vm.pagecache, but in my system...

    Started by vasudevjakhar, 05-26-2015
    • Replies: 1
    • Views: 772
    05-28-2015 Go to last post
  10. Ethernet hang on new kernel

    Hi, After compiled new kernel 3.4 for Centos 6 I get errors like below. Last time when i want reboot server, it hang at deactivating ethernet card...

    Started by rutekp, 05-26-2015
    • Replies: 1
    • Views: 858
    05-27-2015 Go to last post
  11. Having trouble with Intel wifi..

    H guys, I'm trying to trim Linux-pf 4.0 down to fit my hardware, instead of using the bloated cover-all generic kernel Ubuntu uses. I'm hoping to...

    Started by ArgentWarrior, 05-22-2015
    • Replies: 1
    • Views: 723
    05-22-2015 Go to last post
  12. The workings of a USB dongle

    OK, I got a new USB dongle for my net access couple of days ago, and I'm pleased to say that all I had to do was plug it in, and Fedora 20 configured...

    Started by resetreset, 05-13-2015
    • Replies: 1
    • Views: 777
    05-14-2015 Go to last post
  13. Replicating ps -ef function

    Hey everyone, I am trying to create my own ps -ef function inside a linux kernel. For example, ps -ef prints all the information currently running on...

    Started by babazinga, 05-10-2015
    • Replies: 1
    • Views: 779
    05-11-2015 Go to last post
  14. CDC NCM driver in linux 3.19 kernel

    Hi,all I recently met a problem when use the CDC_NCM driver in Linux kernel 3.19. After successfully probed, there is no eth_open function call, so...

    Started by MQN, 05-06-2015
    • Replies: 0
    • Views: 980
    05-06-2015 Go to last post
  15. smap output of a process

    Hi all, I am understanding the smap ouput of a particular process. But, I am not getting what are the unnamed segments in the output. whether...

    Started by kajol, 05-04-2015
    • Replies: 0
    • Views: 677
    05-04-2015 Go to last post
  16. intrrupt service routine in "struct v4l2_subdev_core_ops" (V4L2)

    Hi All, I am discovering usage of struct v4l2_subdev_core_ops following Link: In...

    Started by sukhoivietnam, 01-11-2015
    • Replies: 2
    • Views: 879
    05-03-2015 Go to last post
  17. rt throttling with RT-patch

    Does RT-patch have rt throttling in the same way as a standard kernel?

    Started by mrkozmic, 04-30-2015
    • Replies: 0
    • Views: 629
    04-30-2015 Go to last post
  18. [SOLVED] Command to show the shared memory of each Address using PID of process

    Hi all, I have tried pmap command (pmap -x PID), it shows virtual memory, RSS and dirty pages of each segmentation type. I have also tried the...

    Started by kajol, 04-28-2015
    • Replies: 2
    • Views: 613
    04-29-2015 Go to last post
  19. Permissions for a new file

    When a new file is created, what perms does it have? Is it possible to change this? Imagine I'm a worker at an office working on Libre Office, and...

    Started by resetreset, 04-25-2015
    • Replies: 1
    • Views: 707
    04-25-2015 Go to last post
  20. Modifying a kernel in the real world

    What is the most common way that a systems administrator tunes a kernel (e.g., at work for business purposes)? Does modifying IPtables count? ...

    Started by Evin, 04-24-2015
    • Replies: 2
    • Views: 621
    04-24-2015 Go to last post

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