Re: WTH is going on with memory hotplug sysf interface (was: Re: [RFC PATCH] mm, hotplug: get rid of auto_online_blocks)
From: Andi Kleen <hidden>
Date: 2017-03-13 23:16:14
Also in:
linux-acpi, linux-mm, linux-s390, lkml
and ARCH_SPARSEMEM_DEFAULT is enabeld on 64b. So I guess whatever was the reason to add this code back in 2006 is not true anymore. So I am really wondering. Do we absolutely need to assign pages which are not onlined yet to the ZONE_NORMAL unconditionally? Why cannot we put them out of any zone and wait for memory online operation to put them where requested?
I don't remember any specific reason. May have just been simplification. Should be fine to use any zone. -Andi