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Forum: Kernel

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

  1. Explore btrfs with UML

    Hi, I want to explore (debug) Btrfs with UML so I compile UML from source code linux 4.3 with btrfs enable. Then I try to run ddd (gdb) with UML...

    Started by nguyentl, 12-14-2015
    • Replies: 2
    • Views: 1,322
    01-07-2016 Go to last post
  2. Talking Mapping a i2c register as memory in BBB Issue

    Hi I am using beagle bone black and writing i2c driver just for learning. I used am335x TRM and i2c1 at address 0x4802a000 as mentioned in TRM....

    Started by Elduderini, 12-13-2015
    • Replies: 9
    • Views: 1,466
    12-25-2015 Go to last post
  3. Kernel selection

    I never much cared what kernel I ran as long as my hardware worked. As of late though it has become a concern. I have an HP laptop with AMD A10 and...

    Started by NGIB, 11-29-2015
    • Replies: 2
    • Views: 1,254
    12-17-2015 Go to last post
  4. Post Windriver Linux as Smartcore9100 wimax asn-gateway kernel...

    Dear readers, I hope my post finds you all O.K., I have a WiChorus Smartcore 9100 Series "9160" , it is a Wimax asn-gateway, with a built in...

    Started by Sharista, 12-09-2015
    • Replies: 2
    • Views: 886
    12-16-2015 Go to last post
  5. Implementing a driver for persistent RAM

    Hello guys, I'm having a problem which I was not able to solve on my own. I'm working for a German university and we are doing research on...

    Started by lin_phil, 12-01-2015
    • Replies: 2
    • Views: 981
    12-07-2015 Go to last post
  6. TCP reassembly code in the linux kernel

    Hi, Where can I find the TCP reassembly/GRO code in the kernel? I wand to play with this feature. i.e, disable/enable it and check how the TCP...

    Started by amiryo, 12-03-2015
    • Replies: 2
    • Views: 1,101
    12-05-2015 Go to last post
  7. Dutycycle variation in PWM driver

    Hi I am having pwm driver for constant dutycyle.. i need to vary the dutycyle 0 to 100% in driver. I am using omap tdm 3730 processor. for my...

    Started by rajipriya, 11-27-2015
    • Replies: 0
    • Views: 677
    11-27-2015 Go to last post
  8. Question Question about IPv4 packet checking in br_nf_pre_routing()

    Hi, I am working on Linux bridge netfilter. And to meet the customer a special request, I would need to remove the pskb_trim_rcsum() in bridge...

    Started by alancc_wu, 11-24-2015
    • Replies: 0
    • Views: 524
    11-24-2015 Go to last post
  9. Question Linux Kernel CPU Usage ( HOW TO )

    Hey all what is the most effective way to measure cpu usage in linux kernel !?

    Started by salihboshnak, 11-15-2015
    • Replies: 1
    • Views: 1,183
    11-18-2015 Go to last post
  10. Question How to undo a mistake while compiling device driver?

    I was trying to get my first Hello World device driver program to compile. First, I compiled a stable Linux kernel, booted it via GRUB, and then...

    Started by piperforum, 10-26-2015
    • Replies: 1
    • Views: 820
    10-27-2015 Go to last post
  11. systemd-nspawn overlay error: sys read-only: Invalid argument

    I am trying to leverage the --overlay command from the new systemd-nspawn tool but I cannot seem to get it working. My current scheme (what I want...

    Started by critikull, 10-21-2015
    • Replies: 0
    • Views: 885
    10-21-2015 Go to last post
  12. Interrupt Handler issue

    Hi , I'm trying to write a kernel module driver for my device which is connect through pcie switch .I have registered the interrupt using...

    Started by vidya, 10-13-2015
    • Replies: 0
    • Views: 1,215
    10-13-2015 Go to last post
  13. How can do tcp socket migration?

    Hello, Dear all, I am a M.Sc CE student, and My thesis is about server load balancing using SDN. I am very much Obligated to you if answer my...

    Started by hqasemi, 10-03-2015
    • Replies: 1
    • Views: 1,246
    10-10-2015 Go to last post
  14. BUG: soft lockup - CPU#1 stuck for 22s

    Hi all. I've run into an issue with upgrading a xen VM host server from openSUSE 12.3 to 13.1 I'm running Bonnie++ to test the disk i/o on 6...

    Started by sputnik-1, 09-30-2015
    • Replies: 1
    • Views: 1,920
    10-02-2015 Go to last post
  15. Question [SOLVED] Unknown symbol mutex_lock_interruptible

    I'm stuck with a stange kernel error. I successfully built a wifi driver for my rtl8188eu, but it won't load: >insmod 8188eu.ko Error: could not...

    Started by JoeCool, 09-28-2015
    • Replies: 0
    • Views: 830
    09-28-2015 Go to last post
  16. Freeing Init memory latency issue.

    Hi All, Sorry, I posted this question in another thread but realized this is the proper place. I notice when booting up my custom kernel there...

    Started by tasdvl9, 09-22-2015
    • Replies: 0
    • Views: 1,095
    09-22-2015 Go to last post
  17. 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: 597
    09-20-2015 Go to last post
  18. 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: 1,300
    09-11-2015 Go to last post
  19. 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: 1,010
    09-10-2015 Go to last post
  20. 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: 1,273
    09-10-2015 Go to last post

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