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Forum: Kernel

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

  1. Redirect serial console output

    Hi all, I want to write a kernel driver that redirect the console output to an external display (the interface is just a function call). The...

    Started by otix, 05-08-2010
    • Replies: 0
    • Views: 1,193
    05-08-2010 Go to last post
  2. How to Add Time Zone option to the VFAT

    i would like to add time zone functionality to the linux vfat file system. I would like to know some tutorials for understanding linux source...

    Started by ainee, 05-06-2010
    • Replies: 8
    • Views: 2,047
    05-07-2010 Go to last post
  3. How to determine Amount of free kernel memory and problem with __get_free_pages()

    I want to write a loop that sucks up all the 2mb slugs of memory I can get in the kernel. However, I want to leave "some" free space (say 20% of the...

    Started by staggart, 05-05-2010
    • Replies: 5
    • Views: 2,425
    05-07-2010 Go to last post
  4. Null pointer at "data16" instruction??

    I had a panic in smbd: crash> log | grep -A 1 NULL (U1)(MSG-KERN-00009): Unable to handle kernel NULL pointer dereference at 0000000000000010...

    Started by Bandaid, 05-06-2010
    • Replies: 1
    • Views: 1,228
    05-07-2010 Go to last post
  5. Query about the kernel and kernel packages

    I've been looking at a server and the kernel packages installed. It's got the following on. kernel-2.6.9-55.EL kernel-smp-2.6.9-55.EL...

    Started by Silverflames, 05-05-2010
    • Replies: 1
    • Views: 600
    05-06-2010 Go to last post
  6. debugfs_create_file doesn’t create file

    Hello, I am trying to create a debugfs file using the debugfs_create_file(...). I have written a sample code for this. static int __init...

    Started by bala1486, 05-04-2010
    • Replies: 0
    • Views: 1,474
    05-04-2010 Go to last post
  7. Shared buffer between user and kernel space

    Hi, I need a shared buffer between user and kernel space. I read that one way is to allocated buffer in kernel and then call mmap from the user...

    Started by bala1486, 05-04-2010
    • Replies: 3
    • Views: 2,553
    05-04-2010 Go to last post
  8. lsmod "Used by" column. Why it is empty?

    My lsmod for sound: $ lsmod | grep -i snd why snd_usb_audio has "2" dependences but they are not listed? snd_emu10k1_synth 5156 0 ...

    Started by attorianzo, 05-04-2010
    • Replies: 0
    • Views: 2,720
    05-04-2010 Go to last post
  9. [SOLVED] smp

    I loaded ubuntu on my system the other day. I had some performance issues and found the swappiness setting, so that worked ok. Then I decided to go...

    Started by hatebreed, 05-03-2010
    2 Pages
    1 2
    • Replies: 17
    • Views: 1,712
    05-04-2010 Go to last post
  10. Node size

    Hi, Does the output of the command numactl --hardware available: 1 nodes (0-0) node 0 cpus: 0 1 node 0 size: 8155 MB node 0 free: 3231 MB...

    Started by subbh, 04-30-2010
    • Replies: 0
    • Views: 905
    04-30-2010 Go to last post
  11. tty_io.c can this be made dynamically loadable module

    hi, I am trying to change the hardcoded write buffer size from 2048 bytes to a larger value in tty_io.c. i am able to change it, statically compile...

    Started by ammusiva, 04-30-2010
    • Replies: 0
    • Views: 843
    04-30-2010 Go to last post
  12. Exclamation Is there are any guide to access current task?

    hello, i just want to show current task gdt, tss and page information. is there any article or examples to access these data from kernel 2.6 ...

    Started by machka, 04-30-2010
    • Replies: 0
    • Views: 807
    04-30-2010 Go to last post
  13. Unhappy kernel programming - beginner

    Hi, I don't know If I am writing in the correct place, please excuse-me if not. I am an engineering student and I use the linux OS for quite a...

    Started by vbaudelaire, 04-14-2010
    • Replies: 4
    • Views: 3,485
    04-30-2010 Go to last post
  14. Communication between kernel module and driver

    Hi, I am trying to send/receive a packet to/from an ethernet device ( eth0 for example ), from a kernel module. The question is: can I do that...

    Started by kwhtre, 04-29-2010
    • Replies: 0
    • Views: 3,040
    04-29-2010 Go to last post
  15. Change_page_attr substitute

    Hi, I was about to start coding a LKM and I'll need to change some page attr. I've just read that for kernels>=2.6.25 change_page_attr is...

    Started by wisehacks, 04-29-2010
    • Replies: 0
    • Views: 1,855
    04-29-2010 Go to last post
  16. doubt regarding system call

    Hello All, My problem is i want to find a fast way to switch from user mode to kernel mode. I read about the sysenter instructions on the net. I...

    Started by bala1486, 04-28-2010
    • Replies: 0
    • Views: 658
    04-28-2010 Go to last post
  17. Question Difficulty in reproducing Kernel Bugs

    Hi, i am new the kernel programming and the task i am assigned is to select any of two linux kernel bugs and resolve them. i am facing difficulty...

    Started by ainee, 04-28-2010
    • Replies: 0
    • Views: 629
    04-28-2010 Go to last post
  18. Question A general build problem

    I need to build a kernel driver from next-20100415 source tree, but ended up getting built-in.o and ***.o files in driver directory. (1) How to...

    Started by henryz21651, 04-21-2010
    • Replies: 1
    • Views: 679
    04-27-2010 Go to last post
  19. Context Switching Latency

    Hi Friends, I want to measure the context switching latency of the OS System call(like semaphore). can any one suggent me how can i measure the...

    Started by adviceme, 04-27-2010
    • Replies: 1
    • Views: 4,079
    04-27-2010 Go to last post
  20. How to find Inode object associated with a inode number?(inode table of which blk grp

    Hi guys, I wanted to know how can I find the inode object associated with an inode number. I understand that the inode object is indexed by inode...

    Started by thedemonlovers, 04-26-2010
    • Replies: 0
    • Views: 1,512
    04-26-2010 Go to last post

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