After a recent kernel update for Centos 7.4, Paravirtualized DomUs under Xen stooped booting. They just crash on boot.
Apparently it seems a new restriction in RHEL 7 kernel. And there are some suggestions i found in different forums to switch to HVM or PVHM. Problem is that most of Paravirt DomUs are installed on plain disks (without partitions). But to convert them to HVM or PVHM they need Grub installed inside the VM which need partition table. So it is a full reinstallation :(
Centos guys say it is something RHEL need to fix. So is this a bug which can be fixed in near future ? or is that RHEL just dont want its kernel to run on Paravirt vms any more ?
Had the same issue, and as a hack workaround installed the CentOS Xen kernel before upgrading to 7.4. Had no issues booting with that kernel in place. If RedHat fixes their kernel it should be relatively simple to switch back to it.
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I have installed the Ubuntu in virtualbox for months.
After I upgrade the Linux kernal, I cannot boot Ubuntu with normal mode.
But it can success boot in recovery mode
I occurred some error:
floppy0: no floppy controllers found. => this will let me wait a few minutes, and it will go through.
intel_rapl: no valid rapl domains found in package 0 =>the boot process stuck at this error
I don't know whether it's a problem whit kernal 4.72 or not.
Linux kernal: 4.72 lowlatency amd64
virtualbox version: 5.14
physic cpu: x86_64
I solved the problem by myself.
Below is my method:
1.Enter recovery mode.
2.Install generic version kernel
3.Purge all of the lowlatency kernels
But I still don't know why virtualbox can't run with lowlatency version kernel.
And the error (or normal boot process),"intel_rapl: no vaild rapl domains found in package 0", is still showed when boot, but it dosen't let the boot process stop.
I'm trying to replace centos 6.6 system with centos 7.2, but my kernel module for centos 6.6(kernel 2.6.32) dose not work on centos 7.2(kernel 3.10.0).
There is no source code and I am just a server engineer, not a programmer.
Could you please help me... is there any good solution?
For example, kernel module converter 2.6.32 => 3.10.0, or some hacks to force loading old kernel module...
You can, depending on the kernels.
You can also force load it. But if you force load it your system might crash, depending on how you do it.
I tried that with mint 17 and mint 18.
I am new to Linux, and currently I want to try Kubernetes in my laptop. The official tutorial says
You need to have docker installed on one machine.
Your kernel should support memory and swap accounting. Ensure that the following configs are turned on in your linux kernel:
CONFIG_RESOURCE_COUNTERS=y
CONFIG_MEMCG=y
CONFIG_MEMCG_SWAP=y
CONFIG_MEMCG_SWAP_ENABLED=y
CONFIG_MEMCG_KMEM=y
I just installed Ubuntu 14.04, and I dont know whether the above configs are already turned on or not, how to check them? and if some are still off, how to turn them on?
I am running CentOS 6.5 on top of Linux kernel 2.6.32-358.6.1.el6.x86_64
I got a warning from my vserver hoster that I need to upgrade to a Linux kernel > 3.15-rc5 because there is a security breach that would allow my server to be taken over.
I did a yumupgrade, but it wouldn't upgrade the kernel to a higher version than 2.6.32-358.6.1.el6.x86_64.
Currently I am confused about how to go on.
Could anybody tell me what is going on and how he would act in my position?
Thank you!
That kernel is a development kernel and will likely require you compile from source to install it. Upgrading from kernel 2.6 to 3.1n will likely break a bunch of packages also. The upgrade path for 3.1n in CentOS would be to upgrade to CentOS7 and then compile that kernel yourself.
CentOS backports security fixes and I certainly haven't heard anything about any security bug, and we manage like 150 centos servers. I would ask your host to specify what the security bug is and which patch applied in the 3.15-rc5 kernel fixes it. Who's the host?
I'm using CentOS 6.5 and have no problem using the ElRepo Long term kernel (currently 3.10.x).
See http://elrepo.org/tiki/kernel-lt
Upgrading was just a case of
yum --enablerepo=elrepo-kernel install kernel-lt
and rebooting.
I need to install old kernel into Kali (Debian like) distro. I need to run program which requires older kernel.
I downloaded kernel but the installation gives me too many errors. I was reading similar topics and watch the videos, but so far I am not successful.
I do not have experience with kernels. Is there .deb package for kernels or any other easier way to do it?
Can I use such old kernel for this distribution?
Thank you
The 2.4.33 kernel is pretty old. According to Debian's packaging files installing that old a kernel doesn't seem to be doable in wheezy. Attempting to install and run an old kernel outside the packaging system is not going to to work. All the "modern" libraries and applications will be broken when running the 2.4 kernel, as will the program (you need more than just a kernel for your program). If it were me, I'd set up a virtualization environment like VirtualBox or something similar and pick an old distro like CentOS 3.9 or an older Debian release (sarge or later). If that's not an option, you could always try and port the program to a more recent kernel.