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Forum: Kernel

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

  1. Kernel module. File operations with ttyACM.

    Hello, everyone. I need to write kernel module which will communicate with board through ttyACM. I can only write to board using it, but cannot...

    Started by ParaPik, 09-20-2015
    • Replies: 0
    • Views: 750
    09-20-2015 Go to last post
  2. spi_gpio

    Hi, I want to use SPI functionality over GPIO's after cross compilation and trying to insert the spi_gpio.ko It throwing the below error...

    Started by rajkumarmadhani, 09-11-2015
    • Replies: 0
    • Views: 1,453
    09-11-2015 Go to last post
  3. Modifying dummy audio driver snd_aloop?

    Update: as is often the way, asking the question and then checking for myself that it wasn't completely stupid, has helped clarify a few things! It's...

    Started by RichT, 06-29-2015
    • Replies: 1
    • Views: 1,204
    09-10-2015 Go to last post
  4. 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: 1,468
    09-10-2015 Go to last post
  5. 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: 1,458
    09-10-2015 Go to last post
  6. 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: 1,867
    09-10-2015 Go to last post
  7. 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: 4,295
    08-07-2015 Go to last post
  8. 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: 1,403
    08-05-2015 Go to last post
  9. 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: 4,636
    06-23-2015 Go to last post
  10. Difference between LTP and Autotest

    Which test framework to use for kernel and peripheral testing

    Started by hobbyist, 06-08-2015
    • Replies: 0
    • Views: 1,205
    06-08-2015 Go to last post
  11. 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: 1,031
    06-06-2015 Go to last post
  12. 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: 945
    05-28-2015 Go to last post
  13. 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: 1,125
    05-27-2015 Go to last post
  14. 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: 966
    05-22-2015 Go to last post
  15. 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: 1,007
    05-14-2015 Go to last post
  16. 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: 972
    05-11-2015 Go to last post
  17. 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: 1,364
    05-06-2015 Go to last post
  18. 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: 956
    05-04-2015 Go to last post
  19. intrrupt service routine in "struct v4l2_subdev_core_ops" (V4L2)

    Hi All, I am discovering usage of struct v4l2_subdev_core_ops following Link: lxr.free-electrons.com/source/include/media/v4l2-subdev.h?v=3.2 In...

    Started by sukhoivietnam, 01-11-2015
    • Replies: 2
    • Views: 1,226
    05-03-2015 Go to last post
  20. 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: 790
    04-30-2015 Go to last post

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