Messages in this thread | ![/](/images/icornerl.gif) | | Date | Mon, 24 Aug 2020 12:39:18 +0200 | From | Oscar Salvador <> | Subject | Re: [PATCH v2 02/10] mm/memory_hotplug: enforce section granularity when onlining/offlining |
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On Wed, Aug 19, 2020 at 07:59:49PM +0200, David Hildenbrand wrote: > Already two people (including me) tried to offline subsections, because > the function looks like it can deal with it. But we really can only > online/offline full sections that are properly aligned (e.g., we can only > mark full sections online/offline via SECTION_IS_ONLINE). > > Add a simple safety net to document the restriction now. Current users > (core and powernv/memtrace) respect these restrictions.
It's been a while since I looked at sub-section handling stuff so sorry to ask this, but was it true that we can hot-{remove,add} sub-section granularity, while we can only online /offline on section granularity?
> > Acked-by: Michal Hocko <mhocko@suse.com> > Cc: Andrew Morton <akpm@linux-foundation.org> > Cc: Michal Hocko <mhocko@suse.com> > Cc: Wei Yang <richard.weiyang@linux.alibaba.com> > Cc: Baoquan He <bhe@redhat.com> > Cc: Pankaj Gupta <pankaj.gupta.linux@gmail.com> > Cc: Oscar Salvador <osalvador@suse.de> > Signed-off-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Oscar Salvador <osalvador@suse.de>
-- Oscar Salvador SUSE L3
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