From: Mike Rapoport <rppt@kernel.org>
To: Pratyush Yadav <pratyush@kernel.org>
Cc: Pasha Tatashin <pasha.tatashin@soleen.com>,
Alexander Graf <graf@amazon.com>,
Muchun Song <muchun.song@linux.dev>,
Oscar Salvador <osalvador@suse.de>,
David Hildenbrand <david@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Jason Miu <jasonmiu@google.com>,
Jork Loeser <jloeser@linux.microsoft.com>,
kexec@lists.infradead.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v6 00/22] kho: make boot time huge page allocation work nicely with KHO
Date: Sun, 2 Aug 2026 14:28:31 +0300 [thread overview]
Message-ID: <am8p31hKToQ3WfMT@kernel.org> (raw)
In-Reply-To: <20260801084833.1897543-1-pratyush@kernel.org>
On Sat, Aug 01, 2026 at 10:48:09AM +0200, Pratyush Yadav wrote:
> From: "Pratyush Yadav (Google)" <pratyush@kernel.org>
>
> Hi,
>
> Gigantic huge page allocation is somewhat broken currently with KHO.
>
> Fix this by introducing the concept of extended scratch areas. They are
> areas that the kernel discovers on boot by walking the radix tree and
> finding free memory ranges. See patch 10 for more details.
>
> Muchun Song (1):
> mm/mm_init: simplify deferred_free_pages() migratetype init
>
> Pratyush Yadav (Google) (21):
> kho: generalize radix tree APIs
> kho: make radix max key width more obvious
> kho: disallow wide keys in radix tree
> kho: return virtual address of mem_map from kho_get_mem_map()
> kho: store incoming radix tree in kho_in
> kho: move all memory retrieval logic to kho_mem_retrieve()
> kho: add a struct for radix callbacks
> kho: add callback for table pages
> kho: add data argument to radix walk callback
> kho: allow early-boot usage of the KHO radix tree
> kho: allow destroying KHO radix tree
> kho: add kho_radix_init_tree()
> kho: expose kho_scratch_overlap() to kexec_handover.h
> kho: initialize kho_scratch pointer earlier in boot
> kho: initialize preserved memory map radix tree earlier
> mm/mm_init: don't rely on memblock to get KHO scratch migratetype
> kho: extend scratch
> memblock: always include KHO headers
> memblock: make HugeTLB bootmem allocation work with KHO
> memblock: add memblock_reserved_hugetlb_size()
> kho: exclude hugetlb memory from scratch size calculation
This is applied now to kho-scratch branch in the liveupdate repo:
https://git.kernel.org/pub/scm/linux/kernel/git/liveupdate/linux.git/log/?h=kho-scratch
On top of mm-stable-6d098029de09 branch in Andrew's mm.git.
--
Sincerely yours,
Mike.
prev parent reply other threads:[~2026-08-02 11:28 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-01 8:48 [PATCH v6 00/22] kho: make boot time huge page allocation work nicely with KHO Pratyush Yadav
2026-08-01 8:48 ` [PATCH v6 01/22] kho: generalize radix tree APIs Pratyush Yadav
2026-08-01 8:48 ` [PATCH v6 02/22] kho: make radix max key width more obvious Pratyush Yadav
2026-08-01 8:48 ` [PATCH v6 03/22] kho: disallow wide keys in radix tree Pratyush Yadav
2026-08-01 8:48 ` [PATCH v6 04/22] kho: return virtual address of mem_map from kho_get_mem_map() Pratyush Yadav
2026-08-02 11:25 ` Mike Rapoport
2026-08-01 8:48 ` [PATCH v6 05/22] kho: store incoming radix tree in kho_in Pratyush Yadav
2026-08-01 8:48 ` [PATCH v6 06/22] kho: move all memory retrieval logic to kho_mem_retrieve() Pratyush Yadav
2026-08-01 8:48 ` [PATCH v6 07/22] kho: add a struct for radix callbacks Pratyush Yadav
2026-08-01 8:48 ` [PATCH v6 08/22] kho: add callback for table pages Pratyush Yadav
2026-08-01 8:48 ` [PATCH v6 09/22] kho: add data argument to radix walk callback Pratyush Yadav
2026-08-01 8:48 ` [PATCH v6 10/22] kho: allow early-boot usage of the KHO radix tree Pratyush Yadav
2026-08-01 8:48 ` [PATCH v6 11/22] kho: allow destroying " Pratyush Yadav
2026-08-01 8:48 ` [PATCH v6 12/22] kho: add kho_radix_init_tree() Pratyush Yadav
2026-08-01 8:48 ` [PATCH v6 13/22] kho: expose kho_scratch_overlap() to kexec_handover.h Pratyush Yadav
2026-08-01 8:48 ` [PATCH v6 14/22] kho: initialize kho_scratch pointer earlier in boot Pratyush Yadav
2026-08-01 8:48 ` [PATCH v6 15/22] kho: initialize preserved memory map radix tree earlier Pratyush Yadav
2026-08-01 8:48 ` [PATCH v6 16/22] mm/mm_init: simplify deferred_free_pages() migratetype init Pratyush Yadav
2026-08-01 8:48 ` [PATCH v6 17/22] mm/mm_init: don't rely on memblock to get KHO scratch migratetype Pratyush Yadav
2026-08-01 8:48 ` [PATCH v6 18/22] kho: extend scratch Pratyush Yadav
2026-08-01 8:48 ` [PATCH v6 19/22] memblock: always include KHO headers Pratyush Yadav
2026-08-01 8:48 ` [PATCH v6 20/22] memblock: make HugeTLB bootmem allocation work with KHO Pratyush Yadav
2026-08-01 8:48 ` [PATCH v6 21/22] memblock: add memblock_reserved_hugetlb_size() Pratyush Yadav
2026-08-01 8:48 ` [PATCH v6 22/22] kho: exclude hugetlb memory from scratch size calculation Pratyush Yadav
2026-08-02 11:28 ` Mike Rapoport [this message]
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