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Forum: Kernel

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

  1. 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: 2,221
    05-04-2010 Go to last post
  2. 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: 2,151
    05-04-2010 Go to last post
  3. [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: 1,209
    05-04-2010 Go to last post
  4. 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: 708
    04-30-2010 Go to last post
  5. 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: 712
    04-30-2010 Go to last post
  6. 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: 677
    04-30-2010 Go to last post
  7. 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: 3,165
    04-30-2010 Go to last post
  8. 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: 2,603
    04-29-2010 Go to last post
  9. 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: 1,619
    04-29-2010 Go to last post
  10. 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: 518
    04-28-2010 Go to last post
  11. 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: 491
    04-28-2010 Go to last post
  12. 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: 525
    04-27-2010 Go to last post
  13. 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: 3,426
    04-27-2010 Go to last post
  14. 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: 1,308
    04-26-2010 Go to last post
  15. [SOLVED] Read file from the linux kernel

    I need to read contents of the file into the kernel's memory(without any userspace process). I've found nice solution, but it makes my kernel "Oops"....

    Started by Alex_Justes, 04-24-2010
    • Replies: 1
    • Views: 2,595
    04-24-2010 Go to last post
  16. PLX 9052 device driver

    Hi everyone I need to develop a Linux device driver for a PLX9052 chip. This device is used inside of a PCI card. Does anyone know where I can...

    Started by philp, 04-21-2010
    • Replies: 2
    • Views: 2,720
    04-23-2010 Go to last post
  17. Context Switch in kernel

    Hi all, I just have a small doubt that in the context_switch() function in kernel, there is a function switch_to(next,prev,next). So if I want...

    Started by gokussj9, 04-21-2010
    • Replies: 0
    • Views: 1,210
    04-21-2010 Go to last post
  18. Kernel Panic

    Hi Everybody I am loading stable kernel 2.6.33.1 module on my existing FC7 kernel 2.6.21.I Got new kernel source updated but at the time of...

    Started by nitiket, 04-18-2010
    • Replies: 1
    • Views: 3,265
    04-21-2010 Go to last post
  19. how to get username of the current session in a system call?

    hello all, I am trying to define a new system call which returns the current session's username. But the functions such as geteuid(), getpwd() all...

    Started by KirthiPrakash, 04-18-2010
    • Replies: 2
    • Views: 4,632
    04-18-2010 Go to last post
  20. Linux Kernel Internals pdf link

    Dear All, Please any body have the pdf of Linux Kernel Internals or Student notes of Linux Kernel Internals full please Thank You,

    Started by umeshkmahindrakar, 04-16-2010
    • Replies: 1
    • Views: 1,918
    oz
    04-16-2010 Go to last post

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