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SubjectRe: [PATCH v2 0/7] Allocate memmap from hotadded memory (per device)
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On 22.02.21 12:15, Oscar Salvador wrote:
> On Wed, Feb 17, 2021 at 11:18:59AM +0100, Oscar Salvador wrote:
>> On Tue, Feb 09, 2021 at 02:38:47PM +0100, Oscar Salvador wrote:
>>> Hi,
>>>
>>> here is v2.
>>>
>>> Changes from v1 -> v2
>>> - Addressed feedback from David
>>> - Fence off the feature in case struct page size is not
>>> multiple of PMD size or pageblock alignment cannot be guaranted
>>> - Tested on x86_64 small and large memory_blocks
>>> - Tested on arm64 4KB and 64KB page sizes (for some reason I cannot boot
>>> my VM with 16KB page size).
>>>
>>> Arm64 with 4KB page size behaves like x86_64 after [1], which made section
>>> size smaller.
>>> With 64KB, the feature gets fenced off due to pageblock alignment.
>>>
>>> Changes from RFCv3 -> v1:
>>> - Addressed feedback from David
>>> - Re-order patches
>>>
>>> Changes from v2 -> v3 (RFC):
>>> - Re-order patches (Michal)
>>> - Fold "mm,memory_hotplug: Introduce MHP_MEMMAP_ON_MEMORY" in patch#1
>>> - Add kernel boot option to enable this feature (Michal)
>>>
>>> Changes from v1 -> v2 (RFC):
>>> - Addressed feedback provided by David
>>> - Add a arch_support_memmap_on_memory to be called
>>> from mhp_supports_memmap_on_memory, as atm,
>>> only ARM, powerpc and x86_64 have altmat support.
>>>
>>> [1] https://lore.kernel.org/lkml/cover.1611206601.git.sudaraja@codeaurora.org/
>>
>> Let me refloat this one :-)
>
> Kindly ping :-)

-EBUSY, will try having a look this week!

--
Thanks,

David / dhildenb

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