Questions Tagged With kernel

why my LFS system displays the my host system kernel version?

Gautama — Sun, 16 Nov 2014 13:02:02 -0500

Hello,

i am using Slackware 14.1 64 bit which is my host system.i build LFS/BLFS 7.6 on another partition,when i getting into my LFS/BLFS system i run "uname -r" then i getting my host kernel version "3.10.17" but my LFS/BLFS kernel version is "3.16.2".please help me how to solve this issue.thanks in advance.

how to install old kernel ?

romprabha — Wed, 22 Aug 2012 06:51:10 -0400

I am using fedora 12 kernel 2.6.31.5-127.fc12.i686.PAE So i need kernel 2.6.15.xxxx so help me for this

Thanks in advance By PRABHAKARAN

RE: Kernel alterations

Senex — Fri, 20 Apr 2012 19:21:43 -0400

Can the Linux kernel configuration item: CONFIG_INTEL_TXT be safely deleted? If so, please advise step-by-step (I'm a newbie). Thanks!

kernel for 8 core XEON

Dr. Gavin Seddon — Wed, 01 Sep 2010 09:36:09 -0400

Hi, I have started using the xeon for large intensive jobs. However, only 1 core runs at 100percent. The rest at ~20. My software is for all 8cores. The developer says it's a Linux issue.

On reading it appears Ubuntu isn't ready for 8cores by default and I need to rebuild the kernel. This isn't a prob. However, before starting will someone pls tell me is it ok to find the current ker. source and re configure rather than worry about supporting all necessary drivers in a new file?

Or, is there a better Linux distro for parallel use? I used Gentoo for years so rebuilding is easy. But will someone advise me on this since I don't want any mistakes with Ubuntu?

Thank you. Gav.

Which linux distribution supports kernel 2.6.31+ on an HS21 blade?

uninformed — Wed, 25 Aug 2010 17:57:29 -0400

Red Hat runs on an HS21 but does not yet support that new a kernel. Fedora's OS is not supported for the HS21 blades. I have been unable to find information regarding other linux distributions and the HS21.

I didn't try these myself; an IT person did. He says he tried 5 different LSI Logic SAS disk device drivers with Fedora and none of them worked. He also tried installing RHEL 5.5 and downloaded the latest 2.6.35.3 kernel source code, but could not get the boot process to the login prompt.

Is there a distribution that supports kernel 2.6.31+ easily on an HS21, or a known way to get there?

how to restore linux redhat when this error msg appear

khaled — Sun, 11 Jul 2010 12:55:03 -0400

warning can't access (null) 
exec of unit (null) failed !! :14
unmount /initrd/dev failed :2
kernel panic - not syncing : attempted to kill init!

Update 01 - i couldn't fint /etc/fstab and couldn't find /boot/grub/menu.lst i mount my filesystem partition again coz it wasn't mounted and when i do

df -i

i found /tmp/loop0 mounted on /mmnt/runtime and inodes free is zero it's 100% full i really don't know what is that i go inside it and i found etc , lib , modules , proc , usr , var never mind

when i go to my file system i found lib , pin ,var are not a directory i do e2fsck -fpv /dev/sda5 <--- which is my file system is here and it's done when i reboot nothing change same error appear :( what did u suggest me to do ?

How to gather troubleshooting information during startup?

rschuler — Wed, 09 Jun 2010 15:34:45 -0400

I am trying to get linux installed on an older laptop. Some of the time it starts up and runs just fine. But most attempts of at starting the laptop gets through BIOS and starts linux. Then during the time when /dev is being populated the laptop abruptly powers off.

I do not have any information about what is going wrong on the failed startups. Is there a way to get some logging information out of one of these failed startup attempts? Is there some other troubleshooting technique I should be using?

Is there a (graphical-UI) way to change a process/application priority?

pmarini — Wed, 12 May 2010 08:42:43 -0400

I am familiar with the nice and renice commands on the shell, but is there any graphical method (from the User Interface) to actually launch/run an application at a different priority level so to make it use more CPU than it would normally be allocated to it?
Does the Completely Fair Scheduler introduced with kernel 2.6.23 makes this a moot point now?

debugfs_create_file doesn’t create file

bala1486 — Wed, 05 May 2010 00:03:31 -0400

Hello, I am trying to create a debugfs file using the debugfs_create_file(...). I have written a sample code for this.

static int __init mmapexample_module_init(void)                                 
 {                                                                               
         file1 = debugfs_create_file("mmap_example", 0644, NULL, NULL, &my_fops)\
 ;                                                                               
         printk(KERN_ALERT "Hello, World\n");                                    
         if(file1==NULL)                                                         
           {                                                                     
             printk(KERN_ALERT "Error occured\n");                               
           }                                                                     
         if(file1==-ENODEV)                                                      
           {                                                                     
             printk(KERN_ALERT "ENODEV occured\n");                              
           }                                                                     
         return 0;                                                               
 }

When i ran insmod i could get the Hello, World message but no the error message. So i think the debugfs_create_file worked fine. However i couldn't find any file in /sys/kernel/debug. The folder is there but it is empty. Can anyone help me with this? Thank you...

Thanks, Bala

How Linux gets installed

Anonymous — Thu, 15 Apr 2010 04:37:12 -0400

Hi,

Suppose I get a Kernel source code and try to compile it on Linux which is not having gcc compiler then it will not get compiled for sure b'coz kernel needs gcc for compilation. My question is then how a Linux gets installed on raw hard disk which in not having gcc pre-installed. I also believe gcc can't be installed on raw hard disk (not sure and never tried). So, it is also not the case that Linux installs gcc first and then do the rest later.

Can any one explain how the thing works from lower level point of view.