Re: [RFC PATCH 2/3] mm/memory_hotplug: Create __shrink_pages and move it to offline_pages

From: Oscar Salvador
Date: Thu Aug 09 2018 - 16:50:56 EST

On Thu, Aug 09, 2018 at 12:58:21PM -0400, Jerome Glisse wrote:
> > I would really prefer to be explicit about these requirements rather
> > than having subtle side effects quite deep in the memory hotplug code
> > and checks for zone device sprinkled at places for special handling.
> I agree, i never thought about that before. Looking at existing resource
> management i think the simplest solution would be to use a refcount on the
> resources instead of the IORESOURCE_BUSY flags.
> So when you release resource as part of hotremove you would only dec the
> refcount and a resource is not busy only when refcount is zero.
> Just the idea i had in mind. Right now i am working on other thing, Oscar
> is this something you would like to work on ? Feel free to come up with
> something better than my first idea :)

Hi Jerome,

Definetly it would be something I am interested to work on.
Let me think a bit about this and see if I can come up with something.

Oscar Salvador