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Forum: Kernel

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

  1. Kernel preemption and current task variable

    Hello, In Kernel space context (Kernel 2.6.35), I know that in the case of IRQ context ,the current task is preempted, then the handler is executed...

    Started by baba0044, 06-08-2011
    • Replies: 0
    • Views: 1,262
    06-08-2011 Go to last post
  2. Question no condition is checked between prepare_to_wait() and schedule()

    I'm reading "linux kernel development 3rd". I have a question about the recommended method for sleeping on page 59. The method is: ...

    Started by robertx, 06-07-2011
    • Replies: 0
    • Views: 1,412
    06-07-2011 Go to last post
  3. Question A Query on Compat Ioctl

    Suppose I have defined the following. #define MY_IOCTL_CMD1 _IOR(MAGIC_NUMBER, 0x01, arg1) #define MY_IOCTL_CMD2 _IOW(MAGIC_NUMBER, 0x02, arg2)...

    Started by bmukherjee, 06-07-2011
    • Replies: 0
    • Views: 1,666
    06-07-2011 Go to last post
  4. my driver vs. usbhid driver

    Hi, I'm currently in the process of writing a usb device driver but i have a issue i can't find the answer to so i thought i'd put it to the forum...

    Started by okiura, 06-03-2011
    • Replies: 0
    • Views: 1,542
    06-03-2011 Go to last post
  5. missed interrupts with level sensitive IRQ

    Is this actually possible? I am chasing a very infrequent bug which results in a timeout on a comms link and it seems to be caused by the IRQ...

    Started by davewooff, 06-03-2011
    • Replies: 0
    • Views: 1,094
    06-03-2011 Go to last post
  6. USB Serial Driver

    A general question about the Linux USB serial driver that has puzzled me. In drivers/usb/serial/option.c, there is a function called...

    Started by jay214128, 06-03-2011
    • Replies: 0
    • Views: 2,670
    06-03-2011 Go to last post
  7. Built-in.o

    Hi all , A query related to the kernel build system .. Why do I sometime see a built-in.o file inside some of my kernel drivers ? The...

    Started by Rajesh_CB, 06-02-2011
    • Replies: 0
    • Views: 1,247
    06-02-2011 Go to last post
  8. Is there a compat_read/compat_write (CONFIG_COMPAT)???

    Hello all, I am porting the code of a device driver from 32bit to 64bit. We have both 32bit and 64bit processes talking to the driver through...

    Started by pvpnguyen, 05-31-2011
    • Replies: 2
    • Views: 2,309
    06-01-2011 Go to last post
  9. user mode callback from kernel

    Hi, I have a requirement to use a freeware linux user mode library for data processing. The input data is purely in kernel space and we are finding...

    Started by nitin78, 05-28-2011
    • Replies: 1
    • Views: 1,012
    05-29-2011 Go to last post
  10. ramoops

    Anyone familiar with "ramoops"? Allow me to give some context... I'm loading the 2.6.35 kernel on a test machine and receive this message in...

    Started by dsteelenet, 05-26-2011
    • Replies: 0
    • Views: 1,388
    05-26-2011 Go to last post
  11. libata

    Hi I am looking for an ATA IOCTL command that would provide the capability to set up a buffer in which data can be returned from the drive/sent to...

    Started by odomae, 05-26-2011
    • Replies: 1
    • Views: 941
    05-26-2011 Go to last post
  12. Exclamation kernel panic help

    Hi everybody! I have been having issues with a Red Hat Enterprise 5 server for a while now. I wanted to squeeze a little more performance out of...

    Started by Blue|Fusion, 05-21-2011
    • Replies: 4
    • Views: 1,761
    05-23-2011 Go to last post
  13. NETDEV WATCHDOG: eth1: transmit timed out error

    Hi, I have written a driver for a Wireless LAN chip for PXA270M arm platform. The wireless lan interface is eth1. I am able to ping the...

    Started by sumitv, 05-18-2011
    • Replies: 3
    • Views: 3,090
    05-22-2011 Go to last post
  14. Question Networking issues with 2.6.27 build

    Hi, Iam trying to compile and install the lnyx 2.6.27 kernel version. In this process i used the .config file of (SLES 10) kernel 2.6.16. on...

    Started by anup_sankaran, 05-19-2011
    • Replies: 4
    • Views: 1,653
    05-22-2011 Go to last post
  15. Question about select()

    Hi, I'm trying to understand how the select() system call works. My understanding is the following: - The select() is called in the user space....

    Started by blshyu, 05-19-2011
    • Replies: 0
    • Views: 840
    05-19-2011 Go to last post
  16. Writting a network device driver

    Hello! I'm trying to write a network device driver that creates a device file (for example, /dev/output), and when it's acessed (by system call...

    Started by killer_you, 05-18-2011
    • Replies: 0
    • Views: 695
    05-18-2011 Go to last post
  17. How to control switch Marvel 88E6097 by MDIO bus on MPC8306 processor

    Hi all, i'm starting to write a kernel module to control a Marvel 88E6097 switch connected to a MPC8306 processor through MDIO. Unfortunately i can't...

    Started by MirkoBanchi, 05-18-2011
    • Replies: 0
    • Views: 3,490
    05-18-2011 Go to last post
  18. Red face changing the kernel loadable module size

    Hi, I was trying to load a module using insmod, but the module did not load, as the size of the module was too big. :eek: Is there any limit to...

    Started by rinjo, 05-17-2011
    • Replies: 5
    • Views: 1,888
    05-18-2011 Go to last post
  19. How to control a phy eth device by MII/MDIO

    Hi all, i have some problems trying to control a phy eth device by mii/mdio. I'm a newbie about this topic and i can't find online documentation...

    Started by MirkoBanchi, 05-18-2011
    • Replies: 0
    • Views: 3,061
    05-18-2011 Go to last post
  20. issue while accessing PCI device

    Hi I am trying to bringup a PCI device on an EVAL board. When linux kernel comes up the device is detected and its configuration space is...

    Started by amitkumarpal, 05-18-2011
    • Replies: 0
    • Views: 952
    05-18-2011 Go to last post

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