From: Jork Loeser <jloeser@linux.microsoft.com>
To: Pratyush Yadav <pratyush@kernel.org>
Cc: Mike Rapoport <rppt@kernel.org>,
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>,
kexec@lists.infradead.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 01/12] kho: generalize radix tree APIs
Date: Tue, 5 May 2026 04:20:14 -0700 (PDT) [thread overview]
Message-ID: <331da42-b255-326b-cd5-28d07a7e2cb2@linux.microsoft.com> (raw)
In-Reply-To: <20260429133928.850721-2-pratyush@kernel.org>
On Wed, 29 Apr 2026, Pratyush Yadav wrote:
> From: "Pratyush Yadav (Google)" <pratyush@kernel.org>
>
> The KHO radix tree is a data structure that can track the presence or
> absence of an arbitrary key, with nothing inherently tied to KHO memory
> preservation tracking. This was one of the design goals of the radix
> tree. This was done to enable it to be re-used by other users of KHO.
"Arbitrary key": Not quite the complete 64-bits, rather 64 - PAGE_SIZE,
correct?
> + * kho_radix_add_key - Add a key to the radix tree.
> * @tree: The KHO radix tree.
> + * @key: The key to add.
> *
> + * This function traverses the radix tree based on the key provided. It sets the
> + * corresponding bit in the leaf bitmap to mark the key as present. If
> + * intermediate nodes do not exist along the path, they are allocated and added
> + * to the tree.
Consider adding a note on the key-width limitation.
Best,
Jork
next prev parent reply other threads:[~2026-05-05 11:20 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-29 13:39 [PATCH 00/12] kho: make boot time huge page allocation work nicely with KHO Pratyush Yadav
2026-04-29 13:39 ` [PATCH 01/12] kho: generalize radix tree APIs Pratyush Yadav
2026-05-04 14:44 ` Pasha Tatashin
2026-05-05 11:20 ` Jork Loeser [this message]
2026-05-05 12:54 ` Pratyush Yadav
2026-04-29 13:39 ` [PATCH 02/12] kho: store incoming radix tree in kho_in Pratyush Yadav
2026-04-29 13:39 ` [PATCH 03/12] kho: add a struct for radix callbacks Pratyush Yadav
2026-04-29 13:39 ` [PATCH 04/12] kho: add callback for table pages Pratyush Yadav
2026-04-29 13:39 ` [PATCH 05/12] kho: add data argument to radix walk callback Pratyush Yadav
2026-04-29 13:39 ` [PATCH 06/12] kho: allow early-boot usage of the KHO radix tree Pratyush Yadav
2026-04-29 13:39 ` [PATCH 07/12] kho: allow destroying " Pratyush Yadav
2026-04-29 13:39 ` [PATCH 08/12] kho: add kho_radix_init_tree() Pratyush Yadav
2026-04-29 13:39 ` [PATCH 09/12] memblock: introduce MEMBLOCK_KHO_SCRATCH_EXT Pratyush Yadav
2026-04-29 13:39 ` [PATCH 10/12] kho: extended scratch Pratyush Yadav
2026-04-29 13:39 ` [PATCH 11/12] kho: return virtual address of mem_map Pratyush Yadav
2026-04-29 13:39 ` [PATCH 12/12] mm/hugetlb: make bootmem allocation work with KHO Pratyush Yadav
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