Re: [PATCH v3 1/2] x86: respect memory size limiting via mem= parameter

From: William Kucharski
Date: Thu Feb 14 2019 - 06:01:19 EST

> On Feb 14, 2019, at 3:42 AM, Juergen Gross <jgross@xxxxxxxx> wrote:
> When limiting memory size via kernel parameter "mem=" this should be
> respected even in case of memory made accessible via a PCI card.
> Today this kind of memory won't be made usable in initial memory
> setup as the memory won't be visible in E820 map, but it might be
> added when adding PCI devices due to corresponding ACPI table entries.
> Not respecting "mem=" can be corrected by adding a global max_mem_size
> variable set by parse_memopt() which will result in rejecting adding
> memory areas resulting in a memory size above the allowed limit.
> Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
> Acked-by: Ingo Molnar <mingo@xxxxxxxxxx>

Reviewed-by: William Kucharski <william.kucharski@xxxxxxxxxx>