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Forum: Kernel

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

  1. Help needed regarding BlockDevices in /proc/devices file

    Hi friendz... Below is the information regarding Block Devices in /proc/devices file in my linux pc Block devices: 1 ramdisk 259 blkext ...

    Started by karthik537, 02-04-2013
    • Replies: 3
    • Views: 713
    02-05-2013 Go to last post
  2. Kernel OOM from cache not being dropped

    Sorry if this has been discussed. I did a search on the forum and did not find the answer. If your search-fu is better than mine, please point me in...

    Started by evilquesadilla, 02-01-2013
    • Replies: 1
    • Views: 353
    02-05-2013 Go to last post
  3. Exclamation Can we perform TWO MMAP operation on same /dev file

    I have build an character driver in which i am allocating two PAGESIZE buffer using dma_alloc_coherent Now i am passing the PHYSICAL address of...

    Started by dgashu, 01-29-2013
    • Replies: 2
    • Views: 521
    01-31-2013 Go to last post
  4. Cannot build kernel since 3.7.4

    Ever since 3.7.4 I have not been able to successfully build the linux kernel due to the error given at the end of this post, do any of you have...

    Started by lostmahmind, 01-29-2013
    • Replies: 3
    • Views: 528
    01-30-2013 Go to last post
  5. Serial Driver HW FIFO over flow and 64K tty buffer over flow

    Hi All, We are using the following cat /proc/cpuinfo Processor : ARMv7 Processor rev 7 (v7l) BogoMIPS : 597.64 Features : swp half thumb...

    Started by hiharsh, 12-06-2012
    • Replies: 1
    • Views: 642
    01-28-2013 Go to last post
  6. Compile Kernel "Bad Linux ARM zImage magic" on Calxeda (Highbank)

    Hello everybody, We recently bought a Calxeda machine which holds server boards of ECX-1000 SoCs. Each of these SoCs hold 4 x ARM Cortex A9...

    Started by javpicorel, 12-07-2012
    • Replies: 1
    • Views: 1,848
    01-28-2013 Go to last post
  7. static variable not initialize?

    hello, my program running on redhat 5.7, kernel version is 2.6.18-274.el5 x86_64, meanwhile, there have a shell to watch it, this shell use awk...

    Started by angus83, 01-24-2013
    • Replies: 2
    • Views: 562
    01-28-2013 Go to last post
  8. No /usr/src/linux found

    Hi guys, I am in confusion :confused:. I cannot find the /usr/src/linux file on my centos6.3. I only have "debug" & "kernel" folder under...

    Started by sheauyun, 01-27-2013
    • Replies: 1
    • Views: 359
    01-27-2013 Go to last post
  9. Modifying the bio struct (in bio.h)

    Hello Developers, I am currently attempting to modify the bio struct in bio.h for linux-3.2.0. All I need to do to this structure, at the moment,...

    Started by Misiu10, 01-08-2013
    • Replies: 4
    • Views: 621
    01-25-2013 Go to last post
  10. Ping failed in Linux kernel 2.6.31

    Hi all, I have a problem and need some help. In the Linux kernel 2.6.31.8 physical NIC ping virtual NIC timeout. Roughly as follows: ...

    Started by rokokueiT, 01-10-2013
    • Replies: 1
    • Views: 609
    01-24-2013 Go to last post
  11. compute the run time and sleep time of a process in kernel 2.4

    hi there i'm working on a project about implementing a new scheduler into kernel 2.4 version. i figured out the concepts of how it works. However, i...

    Started by quartaela, 12-18-2012
    • Replies: 1
    • Views: 459
    01-24-2013 Go to last post
  12. Ext4 Filesystem

    In Ext4 if both flex_bg & meta_bg features are enabled, then the copies of super-block and group descriptors follow which pattern? Does it follow the...

    Started by ksubramaniam, 12-31-2012
    • Replies: 1
    • Views: 737
    01-23-2013 Go to last post
  13. Virtual Memory

    I have a doubt about the linux virtual memory concept. What does it actually mean when you say that the linux kerenel has 1 gb of virtual memory...

    Started by kartikkg, 01-09-2013
    2 Pages
    1 2
    • Replies: 11
    • Views: 1,245
    01-23-2013 Go to last post
  14. [SOLVED] Why is the swap used even when there is free memory?

    On my Debian Linux system (Linux 2.6.32) it looks like the swap is being used even though the system has plenty of free memory. The output from...

    Started by ricard, 01-22-2013
    • Replies: 1
    • Views: 447
    oz
    01-22-2013 Go to last post
  15. Adding TCP Illinois to the kernel

    Hi, I am exploring TCP Congestion Control algorithms and I want to add TCP Illinois to my kernel so I can test it. Any idea how? I have never...

    Started by sholex, 01-15-2013
    • Replies: 1
    • Views: 514
    01-20-2013 Go to last post
  16. Problem with lnuma+fork+execvp+ "ls"

    Hi, i got problem with lnuma+fork+execvp+"ls". That is: In my program i call functions from "libnuma" to find out which cpus are from which...

    Started by cswb, 01-18-2013
    • Replies: 0
    • Views: 493
    01-18-2013 Go to last post
  17. Question usb sd card reader driver - where to start?

    I have a usb sd card reader (A sandisk microcuzer). It used to work with older linux version, but doesn't run on my fedora 17 anymore. I am a...

    Started by netsuvi, 01-08-2013
    2 Pages
    1 2
    • Replies: 10
    • Views: 2,329
    01-16-2013 Go to last post
  18. device driver for hard disk

    I have an embedded system and I have developed a device driver for a hard disk controller. When I insert the driver using insmod I get the following...

    Started by beandigital, 01-13-2013
    • Replies: 2
    • Views: 504
    01-14-2013 Go to last post
  19. cpu offline is getting me crazy

    Hello, I have an AMD Athlon(tm) II X4 635 Processor with asusm4a89td pro/usb3 motherboard and 8gb of ecc ram. OS is Ubuntu 12.10 (but problem...

    Started by mgiammarco, 12-28-2012
    2 Pages
    1 2
    • Replies: 14
    • Views: 1,430
    01-12-2013 Go to last post
  20. Prevent kernel reading partition information from disk

    Hi all, I don't know if this is the right forum, but i'll try it anyway... Lately i get a lot of damage disks, which i'm asked to take a look at,...

    Started by drSp0ck, 01-11-2013
    • Replies: 1
    • Views: 611
    01-12-2013 Go to last post

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