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Forum: Kernel

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

  1. Kernel Panic : Unable To Mount Root FS on Unknown Block (0,0)

    Hi, I have an appliance which is running FreeBSD. I wanted to boot WindRiver Linux when I reboot the appliance. There are more than one partition...

    Started by ajayss, 02-24-2017
    • Replies: 3
    • Views: 1,721
    03-07-2017 Go to last post
  2. Question Is there a Kobject associated to every sysfs directory

    Hi I would like to know whether all the sysfs directories are associated with a KObject. If so, Is there a way to get the KObject associated to...

    Started by akhilbaai, 02-23-2017
    • Replies: 0
    • Views: 772
    02-23-2017 Go to last post
  3. Kernel module level controls for mutual resource access?

    I know a little about semaphores and locks I am using for locking read and write operations to complete. However, for a specific hardware for a given...

    Started by pyzahl, 10-27-2016
    • Replies: 1
    • Views: 1,971
    02-22-2017 Go to last post
  4. The first Linux Kernel (linux-1.0) So. What to do with it? I kinda want to compile it, but i dont want to run linux-1.0 on my...

    Started by mindsword, 01-18-2017
    • Replies: 8
    • Views: 1,461
    02-21-2017 Go to last post
  5. Lightbulb Alternate working directory

    Please add an 'alternate working directory' link and make it accessible through '/proc/<pid>'. It should be initially set to the login directory and...

    Started by mtew, 01-17-2017
    • Replies: 7
    • Views: 2,212
    01-29-2017 Go to last post
  6. What do CAL interrupts do and is there a way to disable them?

    I am currently working on highly latency-sensitive software and I have a problem with interrupts. To make sure, processing is as fast as possible, I...

    Started by radschapur, 10-15-2016
    • Replies: 1
    • Views: 1,696
    01-13-2017 Go to last post
  7. Booting The Kernel

    Hello. I'm new in the forum and linux. I want to make my own simple OS. I want to run this OS on VM. But the VM says "No bootable medium found" What...

    Started by UygarKoc, 12-24-2016
    • Replies: 8
    • Views: 1,455
    12-26-2016 Go to last post
  8. usb_modeswitch unsccessful for MediaTek MT6225

    Hi, I am trying to do usb_mode-switch in my almond 3 router but it is not working.Its seems it is not finding the device ,the router is embed...

    Started by pankajcharpe, 12-15-2016
    • Replies: 0
    • Views: 798
    12-15-2016 Go to last post
  9. Question How Does Linux CFS Scheduler Define Domains and Groups?

    Hi Experts, I'm currently learning the source code of Linux kernel CFS. I know the load balancing is based on the schedule domains(sd) and...

    Started by simonwan, 10-11-2016
    • Replies: 0
    • Views: 704
    10-11-2016 Go to last post
  10. Question Updated and detailed description for kernel configurations?

    Hi all! I'm in the process of creating an optimized kernel image for my Zenbook UX303LB which I mainly use to do 3D programming for the browser...

    Started by Edu, 10-09-2016
    • Replies: 2
    • Views: 743
    10-09-2016 Go to last post
  11. Lightbulb A long time issue, Kthreadd stuck processes.

    these kthreadds came from a virtual box instance. What i read is it is stuck on the HDD or some hardware somewhere waiting for a signal to get...

    Started by zzRemix, 09-29-2016
    • Replies: 9
    • Views: 1,522
    09-29-2016 Go to last post
  12. Question Enlarging Linux Kernel Log Buffer more than 4MiB

    I want to have a large log buffer for my logging needs on an Android device (Nexus 5). I've already increased the log buffer size to 4MiB by changing...

    Started by m-d, 09-23-2016
    • Replies: 3
    • Views: 1,072
    09-25-2016 Go to last post
  13. What page replacement algorithms are being used?

    Hi, I read some articles about the memory management in Linux. Some of them say that the page replacement algorithm is LRU. Some say that it...

    Started by syko, 09-05-2016
    • Replies: 2
    • Views: 1,799
    09-06-2016 Go to last post
  14. Problem tracing arguments of compat_sys_execve with ftrace/Perf

    While trying to trace arguments of the 'compat_sys_execve' system call using ftrace or Perf, I noticed that not all arguments are always captured....

    Started by dhendriks, 09-01-2016
    • Replies: 1
    • Views: 889
    09-02-2016 Go to last post
  15. MemFree depleted in /proc/meminfo when writing to flash memory

    Hi, I have a problem where I am writing a 14 MB file into the flash memory. This will be a partition on the ext4 filesystem. However, when I do...

    Started by srivatsa231181, 09-01-2016
    • Replies: 1
    • Views: 676
    09-01-2016 Go to last post
  16. Different output tracing 'wait4' system call for strace vs ftrace/perf

    While trying to trace 'wait4' system calls for a program using ftrace/perf, I noticed that the 'wstatus' pointer doesn't seem to contain useful data....

    Started by dhendriks, 08-29-2016
    • Replies: 0
    • Views: 1,136
    08-29-2016 Go to last post
  17. Question latency with memory mapped files

    Hello All, we are have huge latency with accessing to memory mapped file. we are using multicore xeon, ram size is several times more than...

    Started by maxfox2k, 08-27-2016
    • Replies: 2
    • Views: 1,219
    08-28-2016 Go to last post
  18. How to add Qt lib to my rootfs?

    Dear fellow coders, i'm pretty new to Linux & Qt and right now I need to add Qt lib to my rootfs. I've a SDK with toolchains and is there a...

    Started by quaver23, 08-25-2016
    • Replies: 2
    • Views: 959
    08-25-2016 Go to last post
  19. Does kworker have the higher priorities than the user process?

    Hi, When an application writes data to file system, it is written to VM and the actual writes to disk are deferred. When the dirty portion of...

    Started by syko, 08-19-2016
    • Replies: 1
    • Views: 1,417
    08-19-2016 Go to last post
  20. issue with kernel >4.7

    Hi, when using 4.6 kernels this never happened, but after going to 4.7 onwards and even 4.8rc1 i have masses of kworker threads which seem to be...

    Started by boygeorge, 08-13-2016
    • Replies: 4
    • Views: 1,164
    08-19-2016 Go to last post

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