On 16.09.21 12:29, Borislav Petkov wrote:
> On Thu, Sep 16, 2021 at 12:09:27PM +0300, Mike Rapoport wrote:
>> I think the first sentence about reserving memory before memblock
>> allocations are possible is important and I think we should keep it.
> 
> I expanded that comment this way:
> 
>          /*
>           * Do some memory reservations *before* memory is added to memblock, so
>           * memblock allocations won't overwrite it.
>           *
>           * After this point, everything still needed from the boot loader or
>           * firmware or kernel text should be early reserved or marked not RAM in
>           * e820. All other memory is free game.
>           *
>           * This call needs to happen before e820__memory_setup() which calls the
>           * xen_memory_setup() on Xen dom0 which relies on the fact that those
>           * early reservations have happened already.
>           */
> 

Yes, this seems to be an accurate description.


Juergen