From: Pratyush Yadav <pratyush@kernel.org>
To: Pasha Tatashin <pasha.tatashin@soleen.com>
Cc: akpm@linux-foundation.org, bhe@redhat.com, rppt@kernel.org,
jasonmiu@google.com, arnd@arndb.de, coxu@redhat.com,
dave@vasilevsky.ca, ebiggers@google.com, graf@amazon.com,
kees@kernel.org, linux-kernel@vger.kernel.org,
kexec@lists.infradead.org, linux-mm@kvack.org
Subject: Re: [PATCH v2 03/13] kho: Introduce high-level memory allocation API
Date: Fri, 14 Nov 2025 20:33:17 +0100 [thread overview]
Message-ID: <mafs0ikfc5s02.fsf@kernel.org> (raw)
In-Reply-To: <20251114190002.3311679-4-pasha.tatashin@soleen.com> (Pasha Tatashin's message of "Fri, 14 Nov 2025 13:59:52 -0500")
On Fri, Nov 14 2025, Pasha Tatashin wrote:
> Currently, clients of KHO must manually allocate memory (e.g., via
> alloc_pages), calculate the page order, and explicitly call
> kho_preserve_folio(). Similarly, cleanup requires separate calls to
> unpreserve and free the memory.
>
> Introduce a high-level API to streamline this common pattern:
>
> - kho_alloc_preserve(size): Allocates physically contiguous, zeroed
> memory and immediately marks it for preservation.
> - kho_unpreserve_free(ptr): Unpreserves and frees the memory
> in the current kernel.
> - kho_restore_free(ptr): Restores the struct page state of
> preserved memory in the new kernel and immediately frees it to the
> page allocator.
>
> Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com>
> Reviewed-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Reviewed-by: Pratyush Yadav <pratyush@kernel.org>
[...]
--
Regards,
Pratyush Yadav
next prev parent reply other threads:[~2025-11-14 19:33 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-14 18:59 [PATCH v2 00/13] kho: simplify state machine and enable dynamic updates Pasha Tatashin
2025-11-14 18:59 ` [PATCH v2 01/13] kho: Fix misleading log message in kho_populate() Pasha Tatashin
2025-11-14 18:59 ` [PATCH v2 02/13] kho: Convert __kho_abort() to return void Pasha Tatashin
2025-11-14 18:59 ` [PATCH v2 03/13] kho: Introduce high-level memory allocation API Pasha Tatashin
2025-11-14 19:33 ` Pratyush Yadav [this message]
2025-11-16 6:49 ` Lance Yang
2025-11-16 14:57 ` Pasha Tatashin
2025-11-14 18:59 ` [PATCH v2 04/13] kho: Preserve FDT folio only once during initialization Pasha Tatashin
2025-11-14 18:59 ` [PATCH v2 05/13] kho: Verify deserialization status and fix FDT alignment access Pasha Tatashin
2025-11-14 19:33 ` Pratyush Yadav
2025-11-14 18:59 ` [PATCH v2 06/13] kho: Always expose output FDT in debugfs Pasha Tatashin
2025-11-14 18:59 ` [PATCH v2 07/13] kho: Simplify serialization and remove __kho_abort Pasha Tatashin
2025-11-14 18:59 ` [PATCH v2 08/13] kho: Remove global preserved_mem_map and store state in FDT Pasha Tatashin
2025-11-14 18:59 ` [PATCH v2 09/13] kho: Remove abort functionality and support state refresh Pasha Tatashin
2025-11-14 18:59 ` [PATCH v2 10/13] kho: Update FDT dynamically for subtree addition/removal Pasha Tatashin
2025-11-15 9:40 ` Mike Rapoport
2025-11-15 14:51 ` Pasha Tatashin
2025-11-16 5:46 ` Mike Rapoport
2025-11-14 19:00 ` [PATCH v2 11/13] kho: Allow kexec load before KHO finalization Pasha Tatashin
2025-11-14 19:00 ` [PATCH v2 12/13] kho: Allow memory preservation state updates after finalization Pasha Tatashin
2025-11-14 19:35 ` Pratyush Yadav
2025-11-14 19:00 ` [PATCH v2 13/13] kho: Add Kconfig option to enable KHO by default Pasha Tatashin
2025-11-14 19:35 ` Pratyush Yadav
2025-11-14 21:44 ` [PATCH v2 00/13] kho: simplify state machine and enable dynamic updates Andrew Morton
2025-11-14 22:00 ` Pasha Tatashin
2025-11-14 22:06 ` Pasha Tatashin
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