[PATCH 0/2] Fix subsection vmemmap_populate logic

[Zhenhua Huang]

On 2024/12/7 14:14, Andrew Morton wrote:
> On Fri, 6 Dec 2024 17:13:39 +0800 Zhenhua Huang <quic_zhenhuah at quicinc.com> wrote:
> 
>>
>>
>> On 2024/11/28 15:26, Zhenhua Huang wrote:
>>>
>>>
>>> On 2024/11/21 15:12, Zhenhua Huang wrote:
>>>> To perform memory hotplug operations, the memmap (aka struct page)
>>>> will be
>>>> updated. For arm64 with 4K page size, the typical granularity is 128M,
>>>> which corresponds to a 2M memmap buffer.
>>>> Commit 2045a3b8911b ("mm/sparse-vmemmap: generalise
>>>> vmemmap_populate_hugepages()")
>>>> optimizes this 2M buffer to be mapped with PMD huge pages. However,
>>>> commit ba72b4c8cf60 ("mm/sparsemem: support sub-section hotplug")
>>>> which supports 2M subsection hotplug granularity, causes other issues
>>>> (refer to the change log of patch #1). The logic is adjusted to populate
>>>> with huge pages only if the hotplug address/size is section-aligned.
>>>
>>> Could any expert please help review ?
>>
>> Gentle reminder for review..
>>
> 
> 
> MM developers work on the linux-mm mailing list, which was not cc'ed.
> 
> Please address Catalin's review comment
> (https://lkml.kernel.org/r/Z1Mwo5OajFZQYlOg@arm.com) then resend a v2
> series with the appropriate cc's.

Thanks Andrew! Will do. I was realizing I couldn't fully rely on 
get_maintainers script :)

> 
>