[elrepo] Building for a non-standard kernel

[Manuel Wolfshant]

On 2/19/21 12:03 PM, Roger Sewell wrote:
> If this is not the right place to post this query please tell me where
> is.
>
> I have been sent a built test kernel with a bug fixed, based on a kernel
> many releases later than the current 8.3 RHEL kernel, along with
> corresponding versions of the associated devel packages.
>
> 1. Where can I find instructions for how to rebuild the
>     kmod-megaraid_sas RPM for this non-standard kernel from the 8.3 SRPM
>     package which I have ? (I tried just changing the definition of
>     kmod_kernel_version to 4.18.0-287.el8.test, and it appeared to build
>     OK apart from some warnings of whose severity I'm uncertain, it
>     installed fine, but booting the resulting kernel produced apparently
>     correct boot.log and messages content, but unusable video output both
>     on GDM and the tty interfaces.)


i'll let the experts to chime in but AFAIK, you did the correct thing. 
Happened to me too when I tested a kernel with NVME patches between RHEL 
7.7 and 7.8

I am not really sure because I forgot but IIRC I  experimented with 
vga=NN added to the kernel line

The question is: beside the obvious lack of megaraid support , does the 
kernel boot properly without your kmod ? Because adding a 3rd party 
storage kmod shouldn't fiddle with the video...



>
> 2. Is it indeed possible to build it for an installed kernel that is not
>     the running kernel ? (If not, then I cannot rebuild on my existing
>     hardware.)


yes, it is, of course.