Comment # 7 on bug 1200487 from Mel Gorman

(In reply to Jiri Slaby from comment #6)
> (In reply to Mel Gorman from comment #5)
> > I don't blame you, my question made no sense. I meant -- are there
> > kernel-source.git branches with any modifications necessary made? That way,
> > I could use the minimal SLE patches against mainline as the baseline, then
> > LTO disabled, then LTO enabled.
> 
> OK, so I pushed:
>   origin/users/jslaby/stable/lto
>   origin/users/jslaby/stable/lto-base
>   origin/users/jslaby/stable/lto-disabled
> 
> lto-base is base for both, lto-disabled is the same as lto, but config.
> 

Thanks.

> Then I compiled the lto one on 15sp3 using gcc-12 and booted successfully on
> 15sp4.
> 
> > That way, I could use the minimal SLE patches against mainline as the baseline, then LTO disabled, then LTO enabled.
> 
> The patches are not that easy backportable, so using them on anything older
> (like 15sp4 kernel) creates a lot of conflicts. I.e. all the above is based
> on the stable branch (5.18).

I was not expecting a backport, the confusion may be that I wanted SLE
userspace so the risk of change over time. The first of the tests have started
on one machine (2-socket broadwell) and gcc-12 was used to build the kernel.

Linux version 5.18.4-lto-baseline (root@hardy3) (gcc-12 (SUSE Linux) 12.1.1
20220517 [revision 325d82b08696da17fb26bd2e1b6ba607649357fb], GNU ld (GNU
Binutils; SUSE Linux Enterprise 15) 2.37.20211103-150100.7.29) #1 SMP
PREEMPT_DYNAMIC Fri Jun 17 17:30:35 CEST 2022