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Forum: Kernel

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

  1. Kernel threads vs. user threads implementation (kthreads vs. pthreads)

    I am cross posting this from Stack Overflow to see if anyone can explain this to me. The post was rather long so I'll just post an excerpt and put...

    Started by cybershark5886, 01-23-2016
    • Replies: 1
    • Views: 2,786
    02-07-2016 Go to last post
  2. deleting a big file on "ext3" takes a long time

    The partition where I keep movies is formatted with "ext3". I noticed many times that deleting a file of size > 10 GB takes from 10 to 100 seconds. I...

    Started by beroal, 01-19-2016
    • Replies: 1
    • Views: 835
    01-20-2016 Go to last post
  3. 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: 1,504
    01-07-2016 Go to last post
  4. 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: 1,858
    12-25-2015 Go to last post
  5. 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: 1,394
    12-17-2015 Go to last post
  6. 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: 1,311
    12-16-2015 Go to last post
  7. 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: 1,428
    12-07-2015 Go to last post
  8. 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: 1,347
    12-05-2015 Go to last post
  9. 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: 764
    11-27-2015 Go to last post
  10. 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: 589
    11-24-2015 Go to last post
  11. 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: 1,315
    11-18-2015 Go to last post
  12. 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: 914
    10-27-2015 Go to last post
  13. 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: 1,016
    10-21-2015 Go to last post
  14. 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: 1,277
    10-13-2015 Go to last post
  15. 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: 1,351
    10-10-2015 Go to last post
  16. 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: 2,288
    10-02-2015 Go to last post
  17. 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: 911
    09-28-2015 Go to last post
  18. 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: 1,177
    09-22-2015 Go to last post
  19. 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: 707
    09-20-2015 Go to last post
  20. 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: 1,410
    09-11-2015 Go to last post

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