Re: [PATCH v2 0/5] Allocate memmap from hotadded memory

Rashmica Gupta
2019-07-31T23:06:49Z

On Wed, 2019-07-31 at 14:08 +0200, Michal Hocko wrote:
> On Tue 02-07-19 18:52:01, Rashmica Gupta wrote:
> [...]
> > > 2) Why it was designed, what is the goal of the interface?
> > > 3) When it is supposed to be used?
> > >
> > >
> > There is a hardware debugging facility (htm) on some power chips.
> > To use
> > this you need a contiguous portion of memory for the output to be
> > dumped
> > to - and we obviously don't want this memory to be simultaneously
> > used by
> > the kernel.
>
> How much memory are we talking about here? Just curious.

From what I've seen a couple of GB per node, so maybe 2-10GB total.