Kernel Panic: not syncing: VFS: Unable to mount root fs on unknown block (0,0)
Linux - KernelThis forum is for all discussion relating to the Linux kernel.
Notices
Welcome to LinuxQuestions.org, a friendly and active Linux Community.
You are currently viewing LQ as a guest. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Registration is quick, simple and absolutely free. Join our community today!
Note that registered members see fewer ads, and ContentLink is completely disabled once you log in.
If you have any problems with the registration process or your account login, please contact us. If you need to reset your password, click here.
Having a problem logging in? Please visit this page to clear all LQ-related cookies.
Get a virtual cloud desktop with the Linux distro that you want in less than five minutes with Shells! With over 10 pre-installed distros to choose from, the worry-free installation life is here! Whether you are a digital nomad or just looking for flexibility, Shells can put your Linux machine on the device that you want to use.
Exclusive for LQ members, get up to 45% off per month. Click here for more info.
Kernel Panic: not syncing: VFS: Unable to mount root fs on unknown block (0,0)
Hi All ,
I am facing this Linux Kernel non compilation problem.I am running Ubuntu 9.10 Kernel 2.6.31-22-generic. Now i have changed 2 things in the kernel configurations. First is the kernel frequency from 250 Hz to 1000 Hz and Secondly the UDP_HTABLE_SIZE from 128 to 32768. This both the changes are needed for testing my IMS Bench SIPp load generator for generating huge number of user loads for my OpenIMSCore simulation environement. Now after making both the changes and following the exact rules , http://ubuntuforums.org/showthread.php?t=43065 , and after making all the changes when i am rebooting the OS , i am getting the error , "Kernel Panic: not syncing: VFS: Unable to mount root fs on unknown block (0,0).."
Well i have changed both the values at the same time.
Both the values , Kernel Timer Frequency(changed to 1000 Hz) and UDP_HTABLE_SIZE(changed to 32768) have been done at the same time and then i recompiled the kernel.
I guess the Kernel Panick is coming due to the change of the UDP_HTABLE_SIZE. Now my kernel is Ubuntu 9.10 Karmic with 9.10 Kernel 2.6.31-22-generic. The value of the UDP_HTABLE_SIZE was 128 which i changed. The reason for this change is, the system will generate UDP traffic for 1,00,000 users which i need to evaluate and test. You can refer to this webpage of the traffic load generator which i will be using , http://sipp.sourceforge.net/ims_benc...Pre-requisites.
NOw my question is , what can be the value for this UDP_HTABLE_SIZE constant? Is 128 is fixed or can i increase this value to any optimum level?If yes then what can be the value i can increase and re compile the kernel so that this panic error doesn't come any more?
LinuxQuestions.org is looking for people interested in writing
Editorials, Articles, Reviews, and more. If you'd like to contribute
content, let us know.