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Forum: Kernel

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

  1. 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: 2,022
    08-28-2016 Go to last post
  2. 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: 1,104
    08-25-2016 Go to last post
  3. 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: 1,960
    08-19-2016 Go to last post
  4. 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: 1,300
    08-19-2016 Go to last post
  5. Question [SOLVED] Does 'flush' threads in VM follow the priorities in I/O schedule?

    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, 08-18-2016
    • Replies: 0
    • Views: 705
    08-18-2016 Go to last post
  6. read/write to memory

    Hello, I'm new in kernel land. I'm focusing on the security level. I already understood the risk with a null pointer dereference and buffer...

    Started by jcqguill, 08-05-2016
    • Replies: 3
    • Views: 1,457
    08-14-2016 Go to last post
  7. Build Error while kernel port ( 3.14 to 3.10)

    I am having 3.14 working kernel for my imx6,i want to port 3.10 to imx6 , during the build process i am getting the following error, and am i stuck,...

    Started by michealscott, 07-28-2016
    • Replies: 0
    • Views: 1,156
    07-28-2016 Go to last post
  8. IOCTL locking kernel on Xeon E3-1270 v5

    Has anyone experienced an issue with a system lock up when using IOWR with IOCTL on an Intel Xeon E3-1270 CPU? I have 3 different distributions...

    Started by SignoEleven, 07-26-2016
    • Replies: 1
    • Views: 882
    07-26-2016 Go to last post
  9. File Descriptor information question

    Hi, I was wondering, say I want to implement a system call. This system call takes as input parameter the file descriptor. How would I get the...

    Started by quantumlight, 07-18-2016
    • Replies: 0
    • Views: 921
    07-18-2016 Go to last post
  10. Linux process exit() cleanup question

    I was wondering, if I have a program like this: #include <stdio.h> void main() { printf("Hello World"); }

    Started by quantumlight, 07-17-2016
    • Replies: 4
    • Views: 880
    07-17-2016 Go to last post
  11. mm_struct RSS Counters

    I am trying to copy page table entries to a fresh virtual memory addresses. But I get bad RSS Counter warning for data larger than few mega bytes....

    Started by shankur90, 06-23-2016
    • Replies: 3
    • Views: 2,131
    06-27-2016 Go to last post
  12. Linux kernel time mangement

    delete please

    Started by mappa, 06-23-2016
    • Replies: 0
    • Views: 577
    06-23-2016 Go to last post
  13. Insertion order affects USB devices

    I am using Linux 3.0.1 on an arm9board OK6410-BH. I have a USB encrypted memory stick and associated token. If I insert the encrypted memory stick...

    Started by DavidAL, 06-21-2016
    • Replies: 3
    • Views: 1,031
    06-21-2016 Go to last post
  14. Linux kernel character drivers (kernel module)

    Hi dear community, I am trying to dive into kernel drivers in order to understand how does low level stuff works. I will describe how I...

    Started by Nitup, 06-13-2016
    • Replies: 0
    • Views: 696
    06-13-2016 Go to last post
  15. Virtual/Soft PCI Device

    Hello, I'm developing hardware and have a software simulation for the hardware. To test this software simulation "in situ", I'm wondering if...

    Started by cubeleo, 02-05-2014
    • Replies: 4
    • Views: 2,124
    06-10-2016 Go to last post
  16. The GNU vision and the Linux kernel

    Hello, I've been reading up on the history of GNU, the Hurd kernel and the Linux kernel. I find it all pretty fascinating. What I'm wondering...

    Started by sunnybubblegum, 06-03-2016
    • Replies: 3
    • Views: 1,205
    06-04-2016 Go to last post
  17. Question API Design for "find_prev_bit"

    Background The Linux Kernel API has a find_next_bit API that finds the first set bit in a memory region at or after a given offset: /** *...

    Started by hansonchar, 05-20-2016
    • Replies: 0
    • Views: 1,038
    05-20-2016 Go to last post
  18. Issue with Block Group Descriptor Table replicas in ext3 file system

    Hi, As you know, the block group descriptor table is replicated in various block groups starting from first block group. But the file system...

    Started by anoopss, 03-30-2016
    • Replies: 2
    • Views: 1,219
    05-18-2016 Go to last post
  19. switch_root with systemd: "Too many levels of symbolic links"

    I'm trying to boot a proprietary kernel build and OS after an upgrade to libc and numerous other tools. I'm booting using an initramfs in the 3.2.0...

    Started by Gatica, 04-07-2016
    • Replies: 3
    • Views: 1,816
    05-18-2016 Go to last post
  20. What's the exact purpose of synchronize_net function?

    Can anybody please tell me, what exactly does synchronize_net() function do in LINUX? More specifically, what's the effect of this function if I run...

    Started by Mark1981, 04-30-2016
    • Replies: 1
    • Views: 999
    05-18-2016 Go to last post

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