Re: [RFC PATCH v1 0/4] mm, hwpoison: improve handling workload related to hugetlb and memory_hotplug

[Oscar Salvador]

On Mon, May 09, 2022 at 05:04:54PM +0800, Miaohe Lin wrote:
> >> So that leaves us with either
> >>
> >> 1) Fail offlining -> no need to care about reonlining
> 
> Maybe fail offlining will be a better alternative as we can get rid of many races
> between memory failure and memory offline? But no strong opinion. :)

If taking care of those races is not an herculean effort, I'd go with
allowing offlining + disallow re-onlining.
Mainly because memory RAS stuff.

Now, to the re-onlining thing, we'll have to come up with a way to check
whether a section contains hwpoisoned pages, so we do not have to go
and check every single page, as that will be really suboptimal.


-- 
Oscar Salvador
SUSE Labs