Comment # 85 on bug 1112824 from Takashi Iwai

(In reply to Dead Mozay from comment #84)
> > Are you testing Fedora kernel with openSUSE user-space stuff?  Or are you
> > testing Fedora user-space?
> > 
> > If Fedora kernel works better with openSUSE user-space, then the point
> > should be either Fedora's downstream patch or the difference of the kernel
> > configuration.
> > 
> > For the latter case, you can try to build the upstream kernel with Fedora
> > kernel config and see whether it works.
> 
> I tried to build the kernel with the fedora config, I even wrote about it
> somewhere above, it works better, but there are still some problems,

If you still have the same performance problem with a self-built upstream
kernel using the Fedora config, then it's really something else than kernel.

If something is *improved* by the Fedora kernel config, though, we'd like to
see the difference.  You can try the following:

- Boot with Fedora config kernel, copy /proc/config.gz to .config on 4.19.x
Linux kernel tree, and run "make localmodconfig".  This will give you a minimal
set of kernel config for the currently running kernel.  Save this config to
somewhere.

- Similarly, boot with openSUSE kernel, and do the same.  Now you get two
kernel configs you can directly compare.