On 09.04.21 12:14, Oscar Salvador wrote:
On Thu, Apr 08, 2021 at 11:52:51AM +0200, Oscar Salvador wrote:
I am not really into PMEM, and I ignore whether we need
CONFIG_MEMORY_HOTPLUG in order to have such memory on the system.
If so, the following can be partly ignored.
Ok, I refreshed by memory with [1].
From that, it seems that in order to use PMEM as RAM we need CONFIG_MEMORY_HOTPLUG.
But is that always the case? Can happen that in some scenario PMEM comes ready
to use and we do not need the hotplug trick?
The only way to add more System RAM is via add_memory() and friends like
add_memory_driver_managed(). These all require CONFIG_MEMORY_HOTPLUG.
Memory ballooning is a different case, but there we're only adjusting
the managed page counters.
--
Thanks,
David / dhildenb
