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Forum: Kernel

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

  1. How to create a kernel thread which blinks led for every 500ms ?

    Hi Evenryone, I am facing an issue (buffer overflow) when I create kernel thread which actually blinks led for every 500ms. My implementation...

    Started by mmk622, 02-09-2012
    • Replies: 0
    • Views: 904
    02-09-2012 Go to last post
  2. Regarding cat /sys/kernel/debug/clock/clock_tree output ..

    Hi , Whenever i issue the command cat /sys/kernel/debug/clock/clock_tree i gwt to see the sdmmc clock frequencies . It shows me as sdmmc4 , sdmmc3...

    Started by dskonnur, 02-09-2012
    • Replies: 0
    • Views: 859
    02-09-2012 Go to last post
  3. Is it possible, that 32-bit kernel with HIGHMEM is faster?

    Hello, I have PC with 2 Gigs of RAM and I was curious if I can get performance gain disabling CONFIG_HIGHMEM and using CONFIG_VMSPLIT_2G_OPT. I have...

    Started by solbore, 02-04-2012
    • Replies: 1
    • Views: 1,084
    02-09-2012 Go to last post
  4. IPC in AF_UNIX sockets

    how does client and server communicate with each other through IPC I want to know how the buffer send from the client reaches to the server through...

    Started by Innovator, 02-07-2012
    • Replies: 1
    • Views: 756
    02-09-2012 Go to last post
  5. updating an existing kernel

    I have made changes in the existing linux kernel source code and i just want to update this existing kernel instead of installing a new kernel I...

    Started by Innovator, 02-07-2012
    • Replies: 2
    • Views: 666
    02-09-2012 Go to last post
  6. [SOLVED] Problem with get_empty_filp!

    Hi, In my file system filter I'm observing that get_empty_filp is behaving not the way it is meant to work. In multi-threaded environment I see...

    Started by nareshpandey, 02-07-2012
    • Replies: 1
    • Views: 632
    02-08-2012 Go to last post
  7. build or compile rootfs from box A

    Dear All I am a rookie to Linux. I have two units of two-way Linux router Boxes {Platform: iDirect iDS Platform (XScale)} BOX "A" is ok. No...

    Started by N57GREEN, 09-18-2010
    • Replies: 1
    • Views: 1,597
    02-07-2012 Go to last post
  8. dereferencing pointer to incomplete type

    Hello, I m modifying the kernel's structure task_struct to include a socket structure pointer in it and also the socket structure to include fd as...

    Started by mjames, 02-03-2012
    • Replies: 1
    • Views: 1,055
    02-07-2012 Go to last post
  9. Including file in a makefile

    hello, i want to include Af_unix.h(include/net/af_unix.h) file in my sche,h file of linux. but when I compile the kernel it gives me error...

    Started by Innovator, 02-01-2012
    • Replies: 3
    • Views: 1,059
    02-05-2012 Go to last post
  10. calculate System uptime before init phase.

    Hi, I am a newbie to the linux kernel. I want to calculate the system uptime of the running system right from boot up. I am able to fetch the time...

    Started by abhiram7, 02-03-2012
    • Replies: 0
    • Views: 588
    02-03-2012 Go to last post
  11. Interrupt Driver

    Hi, I wrote an interrupt program for keyboard. Full code is here int.c #include<linux/kernel.h> #include<linux/interrupt.h>...

    Started by steffi, 01-12-2012
    2 Pages
    1 2
    • Replies: 10
    • Views: 5,957
    02-01-2012 Go to last post
  12. device emulation in current system (i.e. without any virtual machine)

    Hi! I'm looking for a way to emulate the PLX9050-based device (simple data bus). So I wish to make some fake device that could be determined as a...

    Started by metawishmaster, 01-30-2012
    • Replies: 2
    • Views: 594
    02-01-2012 Go to last post
  13. exchange data from kernel to process

    Hi everybody, I really am a newbie in kernel development and I have this question. I am developing an application that need to read some...

    Started by AlexSuperTramp13, 01-28-2012
    • Replies: 2
    • Views: 626
    02-01-2012 Go to last post
  14. Question 'read' function in uClibc 0.9.32

    What is the first function run in uClibc when user application call read(...)? I only could find _syscall3(ssize_t, read, int, fd, __ptr_t,...

    Started by unifoxz, 01-25-2012
    • Replies: 2
    • Views: 710
    02-01-2012 Go to last post
  15. Getting SCSI Commands from URB (USB request Block)

    Hi, I want to capture SCSI commands from URB (USB Request Blocks) of Mass Storage Devices from the Driver layer. Is there a way to convert...

    Started by barunparichha, 01-31-2012
    • Replies: 0
    • Views: 1,083
    01-31-2012 Go to last post
  16. user space mmap overlapping with kernel ioremap range

    Hello all, Sorry for yet another mmap-related question. Bottom line question - is there any problem with mmap'ing (with /dev/mem) over a range...

    Started by IGW, 03-06-2010
    • Replies: 3
    • Views: 4,007
    01-30-2012 Go to last post
  17. [SOLVED] How to console 80x25?

    Hi, I think this is a kernel issue, so i post it here. Let's go, i have Ubuntu 10.04 (2.6.32-34-generic) with autologin in TTY1 and Gnome with...

    Started by playerum, 01-24-2012
    • Replies: 1
    • Views: 2,789
    01-27-2012 Go to last post
  18. Unhappy debugging the kernel

    I want to know how to debug the kernel while my client and server program are running .Actually i want to know the flow of the socket functions when...

    Started by Innovator, 01-03-2012
    • Replies: 1
    • Views: 479
    01-24-2012 Go to last post
  19. 2 .config kernel flags

    what are the following flags for (meaning) ? CONFIG_ARCH_HAS_CPU_IDLE_WAIT=y CONFIG_ARCH_HAS_DEFAULT_IDLE=y

    Started by dubi, 01-23-2012
    • Replies: 1
    • Views: 1,094
    01-24-2012 Go to last post
  20. Struct member +module_param

    Hi, i want to set a member of a structure as modul parameter. The following does not work: typedef struct foo{ unsigned int bar; }foo;

    Started by user20000, 01-21-2012
    • Replies: 0
    • Views: 894
    01-21-2012 Go to last post

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