linux-kernel - Re: [RFC PATCH 00/10] liveupdate: hugetlb support

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Message-ID: <86h5u0ax0a.fsf@kernel.org>
Date: Tue, 09 Dec 2025 09:18:45 +0100
From: Pratyush Yadav <pratyush@...nel.org>
To: Zhu Yanjun <yanjun.zhu@...ux.dev>
Cc: Pratyush Yadav <pratyush@...nel.org>,  Pasha Tatashin
 <pasha.tatashin@...een.com>,  Mike Rapoport <rppt@...nel.org>,  Andrew
 Morton <akpm@...ux-foundation.org>,  David Hildenbrand <david@...nel.org>,
  Lorenzo Stoakes <lorenzo.stoakes@...cle.com>,  "Liam R. Howlett"
 <Liam.Howlett@...cle.com>,  Vlastimil Babka <vbabka@...e.cz>,  Suren
 Baghdasaryan <surenb@...gle.com>,  Michal Hocko <mhocko@...e.com>,
  Jonathan Corbet <corbet@....net>,  Thomas Gleixner <tglx@...utronix.de>,
  Ingo Molnar <mingo@...hat.com>,  Borislav Petkov <bp@...en8.de>,  Dave
 Hansen <dave.hansen@...ux.intel.com>,  x86@...nel.org,  "H. Peter Anvin"
 <hpa@...or.com>,  Muchun Song <muchun.song@...ux.dev>,  Oscar Salvador
 <osalvador@...e.de>,  Alexander Graf <graf@...zon.com>,  David Matlack
 <dmatlack@...gle.com>,  David Rientjes <rientjes@...gle.com>,  Jason
 Gunthorpe <jgg@...dia.com>,  Samiullah Khawaja <skhawaja@...gle.com>,
  Vipin Sharma <vipinsh@...gle.com>,  linux-kernel@...r.kernel.org,
  linux-mm@...ck.org,  linux-doc@...r.kernel.org,
  kexec@...ts.infradead.org
Subject: Re: [RFC PATCH 00/10] liveupdate: hugetlb support

Hi,

On Mon, Dec 08 2025, Zhu Yanjun wrote:

> 在 2025/12/6 15:02, Pratyush Yadav 写道:
>> This series adds support for live updating hugetlb-backed memfd,
>> including support for 1G huge pages. This allows live updating VMs which
>> use hugepages to back VM memory.
>>
>> Please take a look at this patch series [0] to know more about the Live
>> Update Orchestrator (LUO). It also includes patches for live updating a
>> shmem-backed memfd. This series is a follow up to that, adding huge page
>> support as well.
>>
>> You can also read this LWN article [1] to learn more about KHO and Live
>> Update Orchestrator, though do note that this article is a bit
>> out-of-date. LUO has since evolved. For example, subsystems have been
>> replaced with FLB, and the state machine has been simplified.
>>
>> This series is based on top of mm-non-unstable, which includes the LUO
>> FLB patches [2].
>>
>> This series uses LUO FLB to track how many pages are preserved for each
>> hstate, to ensure the live updated kernel does not over-allocate
>> hugepages.
>
>
> Is this patch serise based on the patches in the link
> https://lkml.org/lkml/2025/11/26/1665?

No. That is an independent series. This series is based on
mm-nonmm-unstable, which has the base LUO patches and the LUO FLB
patches, but not the VFIO or IOMMU patches.

[...]

-- 
Regards,
Pratyush Yadav