General :: Getting Out Of Space While Building Kernel

Jul 10, 2011

I am trying to build linux kernel I am getting out of space after a while. I unpacked it in /usr/src directory. It seems I have plenty of space. How much space does it need to compile & build kernel. I am using VirtualBox.

root@vinay-VirtualBox:/usr/src/linux-2.6.39.3# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda1 6.9G 3.2G 3.4G 49% /
none 669M 640K 668M 1% /dev
none 675M 24K 675M 1% /dev/shm
none 675M 96K 675M 1% /var/run
none 675M 0 675M 0% /var/lock
/dev/sr0 39M 39M 0 100% /media/VBOXADDITIONS_4.0.10_72479

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General :: Division Of Logical Memory Space In To User Space And Kernel Space

Jan 4, 2010

Logical Memory Space of 4GB is divided in to 3GB User Space and 1GB Kernel Space. Always. Correct?

1. How can we change it? (just changing value of PAGE_OFFSET is okay?)

2. If system have only 256MB of memory (embedded system) and suppose Kernel Modules eat away all the memory during boot. User space will be left will no memory. Is this case possible?

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General :: Calling User Space Callback Function From Kernel Space?

Sep 22, 2009

I am writing device driver in which i have to call callback function from kernel space, which are saving my data. But the callback functions are in userspace. While accessing them i am getting segmentation fault.

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General :: Error Building Kernel 2.6.36

Nov 2, 2010

I tried to build linux-2.6.36 but I got this error message

Code:

I looked into gcc-version.sh but the problem is located somewhere else I thought at first one of the files might have been corrupted and I downloaded the archive again.

I must also say that this happened in different versions of slackware (the distro I use): 12.0, 12.1, 12.2, 13.0, 13.1

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OpenSUSE :: Kernel Module / Building VirtualBox Guest Additions Kernel Modules - Failed?

Feb 10, 2010

I installed openSUSE 11.2 on virtualbox. My host is windows 7. I tried to install the guest additions, but i get an error saying

Code:
Building VirtualBox Guest Additions Kernel Modules...Failed
(Your system does not seem to be set up to build kernel modules)

How should i go about to let my system build kernel modules?

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Ubuntu :: Kernel Building Error Kernel-package=12.032

Oct 5, 2010

I installed ubuntu on my laptop recently and would like to have trim support. (Because I have a ssd drive (crucial c-300 256gb). The current kernel that I am using is the 2.6.32 (standard lucid kernel I believe). Unfortunately TRIM support is only available from 2.6.33 and up. So I thought I'd install a new kernel using this howto:

[Code]....

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General :: Measure Kernel Space Time And User Space Time?

Nov 28, 2010

measure kernel space time and user space time?

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Programming :: Passing Data Between Kernel Space To User Space In Asynchronous Way

Dec 13, 2010

I am developing a I2C CDROM client driver. The CDROM firmware supports TOC information read through a I2C command. It sends the TOC information in burst ( Interrupts a GPIO pin when it is ready ) and my CPU does a I2C read to read the TOC. When the CDROM firmware finishes sending the last data burst , it informs my CPU that it is done with the TOC, by a flag in the last data burst. I would like to know, which is the most efficinet way I can send these TOC information to userspace?

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Programming :: Function In Kernel Space Called Form User Space

Jul 7, 2009

I wanna write a file in kernel space but from my searching I can to know that instead of writeing file in kernel space ,I can write data to user space by copy_to_user space.

But link is missing ...I dont know how will my user space will access kernel space means my function in kernel space which will do copy_to_user /....How my user space function will call my kernel level function ..

Can any one of you provide me with some example file which are doing this .I know every char driver is using it ...but i could not trace back how user level function is accessing it ...i m confused between user space and kernel space.

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Programming :: Call Socket Prog Code Written In User Space From Kernel Space?

Jul 14, 2009

How to use execv from kernel space to call a user space program writtenfor socket prog.

I tried to write code for socket in kernel but its not working.

Socket code in kernel is also needed.

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Programming :: Signal From Kernel Space To User Space?

Jul 21, 2011

I have the following requirement in my module. The driver gets some data from the external device. After getting 1MB of data it has to send it to the user space application. What is the best thing to implement for this in driver.? Is it ok to implement like, after getting data, the driver will send a signal to the user space application. Then the user space application sends an ioctl to read the data. Is there any alternate, that the driver directly sends the data without the user space application asks for it.?

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General :: I2C Communication From Kernel Space?

May 11, 2011

How do you interface with the Linux I2C driver from kernel space? For example, if I had LEDs connected to a GPIO expander on the I2C bus, how would I blink them twice before going down for reset from machine_reset()?

Essentially, I believe I need to call the functions i2c_smbus_write_byte(), i2c_smbus_read_byte(), etc. But these functions require I2C client data that I do not understand how to supply.

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General :: Kernel Module Run In It / User Space?

Oct 25, 2010

I'm pretty new to this whole (micro)kernel architecture story.

Im wondering if a kernel module is running in kernel or in user space?

Is a driver running as kernel module slower than a driver build into kernel?
If so, are there some current articles, benchmarks?

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General :: Difference Between User And Kernel Space?

Jul 12, 2010

what difference between user and kernel space.

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General :: Time Function In Kernel Space?

Jan 26, 2010

I manage to use the function "time" and "localtime" in gcc.But while I used it in a module in kernel space the above 2 functions are giving error.Even in kernel space time.h header file is not identified. tell the similar time function which can be used in kernel space

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General :: Shared Buffer Between User And Kernel Space

May 3, 2010

I need a shared buffer between user and kernel space. I read that one way is to allocated buffer in kernel and then call mmap from the user space. I searched for an example but couldn't find something useful. If you know, could you please send me any links or sample code that does this..

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General :: Time Oriented Program In Kernel Space?

Jan 28, 2010

I have written a programme in gcc

#include <time.h>
#include <stdio.h>
int main(void)

[code]...

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Debian Programming :: Building Kernel Module

Dec 8, 2013

I'm trying to build the kernel module for dvbhdhomerun. The problem is the linux kernel headers provided by Debian do not have the dvb header files. Trying to set up my own kernel source tree to use is not working out so well.

I'm following the instructions in the Debian section here: [URL] ....

My first try compiled, but the modules ender up under /lib/modules/3.2.51/extra instead of /lib/modules/3.2.0-4-amd64/extra. Why?

I tried to start over, but noticed this while running apt-get source linux-image-3.2.0-4-amd64:

Code: Select allReading package lists... Done
Building dependency tree       
Reading state information... Done
Picking 'linux' as source package instead of 'linux-image-3.2.0-4-amd64'
NOTICE: 'linux' packaging is maintained in the 'Svn' version control system at:
svn://svn.debian.org/svn/kernel/dists/trunk/linux/

[Code] ....

The failure to verify the signature has me concerned, but beyond that, what do I do about the different version number when compiling and installing the kernel modules?

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Fedora :: Building Custom Kernel For F8 To Update?

Nov 8, 2009

I am trying to update my fedora 8 kernel, is there a way to do that? I build the one of kernel.org but when i want to boot it a get a lot of messages like:
mount: cant find /dev/root
I tried to follow the guide at building a custom kernel for fedora, but thats just for the last supported version of the kernel of fedora 8.

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Fedora :: Override .config When Building Kernel Rpm?

Jul 14, 2011

I am using FC15.I need a kernel with a different configuration - with the "Preemptible Kernel (Low-Latency Desktop)" option in the Processor Type and features menu. I need this to support my firewire audio device. I would like to build a new kernel RPM from the SRPM so that i can keep a clean system with RPMs for all files, and I don't really want to manually override the kernel bypassing RPM.I am following **exactly** the process described there - I install the SRPM, unpack the source, then use the starting sample config files in the BUILD folder to create a new customised .config file with the new option, then copy this back to the SOURCE folder.

This works perfectly if I make a standard kernel. But I cannot get the process to work if I change the config file. Every time I compile I end up with exactly the standard kernel -- a vanilla i686 kernel, without my custom config.I believe the problem is that when I run rpmbuild to compile the kernel, this process overwrites my config option. I found that there is a script (merge.pl) which creates new config files dyanmically for all kernel options based on fragments in the SOURCE folder. It looks like the script never uses the config file that I am putting into the SOURCE folder.The wiki page suggests using this command to copy my custom config file cp .config ~/rpmbuild/SOURCES/config-`uname -m`

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Programming :: Building And Running New Kernel Modules In An X86 Pc

Sep 26, 2010

I have an x86 pc and installed lucid these are the details of my distribution version:

I am trying to build a kernel module i am getting the following error:

How to build kernel modules

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Red Hat / Fedora :: Boot Error After Building New Kernel

Nov 19, 2009

I am using Centos 5 with an old kernel. I want to build the latest version for atheros 5K wireless drivers. So i downloaded, and compiled with the ".config" which is already in /boot , and made it ready to run.

However, whenever i try to boot with new kernel, after choosing it from the grub menu, i got the following error. I tried many many .config files but the result was the same.

Here is the screen capture of the error;

I'm trying this process for a week without any success...

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Software :: Specifying GCC Version For Building Kernel Module

May 1, 2011

I'm trying to set up a netbook I purchased that has a lot of more recent hardware, and so I'm having to compile some kernel modules on my own. I've installed Debian on this particular system, and so the version of gcc that was used to compile the kernel is older than the one currently in the repos. Now, I've installed the version I need, but can't remember how to specify building the modules in question with said version.

I've done this in the past, and recall temporarily changing some variable to use the different version, but it's been a while and I just can't remember. Is there an easier way to do this on the fly for any compilation? Or is changing a variable necessary? If there is no way to explicitly specify gcc version used prior to a compilation, could someone remind me of the variable I need to change to use x.x.x version?

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Slackware :: Building SlackBuilds KVM Does Not Work - 2.6.35.4 Kernel

Oct 1, 2010

Since there was a lot of talk about virtualization I thought I try kvm -- before I used VirtualBox. I took the SlackBuild from SlackBuilds.org and got an error with u8 as type in /usr/include/scsi/scsi.h. (sorry, I don't have the exact error message anymore..) I searched for its definition and I only found __u8 in /usr/include/linux/types.h. Then I searched the web and found a "fix" which says I have to change u8 from /usr/include/scsi/scsi.h to __u8. This problem was solved, but when I run the SlackBuild now it stops at some point and I don't know why. These are the last few lines of output:

CC arm-softmmu/translate.o
CC arm-softmmu/tcg/tcg.o
CC arm-softmmu/tcg/tcg-runtime.o
CC arm-softmmu/fpu/softfloat.o .....
LINK i386-softmmu/qemu
AR arm-softmmu/libqemu.a
LINK arm-softmmu/qemu-system-arm
root@tux:/home/christian/Downloads/kvm#

I put an echo after the make for building kvm and I put an echo after "make install". None of them are printed.

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CentOS 5 Server :: Building Custom Kernel 2.16.19-128.1.10?

May 27, 2009

I have builded my kernel through wiki manual, BUT, the kernel-headers rpm-package has not been builded. Now i have only two packages: kernel and kernel-devel. Is that ok? (i think, that it is not ok, because when i build the same version of kernel on x86_64 platform, after rpmbuild command i have kernel, kernel-devel and kernel-headers packages) My CentOS version is 5.2; platform i686; kernel, kernel-headers, kernel-devel packages 2.6.18-92.el5.

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General :: Mapping Kernel Virtual Address Space To Physical Memory Zones?

Nov 4, 2010

As i undertsand - out of 1GB of the virtual Address space for Kernel from 3GB to 4GB of the process address space, Kernel image (code, data, bss, stack, heap) resides staring @0x0 address. Vmalloc area starts either at the end of Physical ram size or at 896M. This 896M cap is mandated to ensure that minimum of 128MB is reserved as vmalloc_reserve for vmalloc,kmap etc.

Is the understanding correct? Now trying to map Physical Zones into this 1GB address space

Initial 16MB is mapped to ZONE_DMA
16MB - 896MB is mapped to ZONE_NORMAL
896MB - 1024MB is mapped to ZONE_HIGHMEM

Does this mean that Kernel image is residing in ZONE_DMA area? Any call to vmalloc() in kernel code will return address beyond 896M? insmod of any LKM will internally invoke vmalloc() to obtain contiguous area - where will this code physically located along with rest of kernel code in ZONE_DMA or in ZONE_HIGHMEM?

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Debian Configuration :: Building A Loadable Kernel Module?

Jul 30, 2010

I upgraded my kernel in my Debian Lenny to version 2.6.32-bpo.4-amd64 to fix a problem with a software and ALSA-related issues. The thing is that now, when I boot, eth1 is not enabled and I have to "load" (I guess) the driver each time. To do this, I go to the folder where all the files for the drivers are and I run:

modprobe lib80211
and then
insmod wl.ko

That I got from the readme file. That gets the wireless working perfectly again, but when I reboot the wireless is dead again and I have to run the commands above again. I imagine that what I should do is to build the driver again, for my new kernel. However, according to the readme file, before I need to install linux-headers-generic and build-essential. With build-essential, it says it's already the newest version, and with the linux-headers, I don't know which one should I install for my kernel! I thought it would be the linux-headers-2.6.32-bpo.4-xen-amd64, but when I tried that, this is what happened:

debian:/home/hernan/Programas/hybrid_wl# apt-get install linux-headers-2.6.32-bpo.4-xen-amd64
Reading package lists... Done
Building dependency tree       

[code]....

So the warning says something about the MODULE_LICENSE being missing... how to build the driver again to make it load each time I boot?

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Fedora :: Recover .config After Building Customized Kernel

Oct 18, 2010

Supposed I have built customized kernel rpm four times in a row and the latest built kernel failed. If I still have all four kernel.xxx.rpm files, is there any way that I could get back the .config file used for each of those four builds? I really could not recall exactly what changes I had made in .config for each build.

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Slackware :: Failure Building Nvidia-kernel Slackbuild From SBo?

Jun 27, 2011

I have a brand new installation of 13.37 but I can't seem to get the nvidia-kernel (64 bit only) Slackbuild from slackbuilds.org to build. I have the nvidia driver installed and working on 13.1 so I am not desperate yet: although I thought that it could just be something with the older Nvidia driver so I waited for the updated release but it fails in the same way.I have uninstalled xf86-video-nouveau and installed xf86-video-nouveau-blacklist-noarch-1.txz from /extra.I have also installed libvdpau from SBo. The nvidia-driver Slackbuild builds fine.I am using the stock 2.6.37.6 huge kernel but have also tried the 2.6.38.4 kernel from /extra and the 2.6.38.7 kernel from Slackware-current.Here is the error message I am seeing:

Code:
root@DarkStar:/home/server/Utils/Packages/Slackware/13.37/64/nvidia-kernel# SRCSUFFIX="-no-compat32" ./nvidia-kernel.SlackBuild

[code]....

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Debian :: Recompiling Changed Code When Building Kernel Debs

Jan 15, 2016

How do I force recompilation of the kernel .deb packages. After a small change I make to the sources without having to clean the sources and recompile the whole kernel again?

Code: Select all$ fakeroot make -f debian/rules.gen setup_i386_none_686
$ fakeroot make -f debian/rules.gen binary-arch_i386_none_686 binary-indep

Calling the second command again does not recompile the modified code, just recreates the .deb packages.

If I use:

Code: Select all$ make -f debian/rules clean before the build command, then it will recompile everything which takes ages.

How can I force recompilation of the files/objects I changed (and dependencies)?

I use this guide: [URL] .... ('Building only a single kernel variant' section)

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