From: sashiko-bot@kernel.org
To: "Pasha Tatashin" <pasha.tatashin@soleen.com>,
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Cc: robh@kernel.org, linux-integrity@vger.kernel.org,
linux-crypto@vger.kernel.org, keyrings@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-security-module@vger.kernel.org, dm-devel@lists.linux.dev,
linux-kernel@vger.kernel.org, driver-core@lists.linux.dev,
linux-doc@vger.kernel.org, linux-mm@kvack.org,
linux-arch@vger.kernel.org, devicetree@vger.kernel.org,
"Eric Biggers" <ebiggers@kernel.org>,
kexec@lists.infradead.org, conor+dt@kernel.org,
linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH v3 01/12] kexec: Add a crash memaction registry
Date: Mon, 28 Sep 2026 17:36:45 +0000 [thread overview]
Message-ID: <20260928173645.C373E1F000FF@smtp.kernel.org> (raw)
In-Reply-To: <20260928-crash-memaction-upstream-20260921-v3-1-e511e9ee2329@jaseg.de>
> Add a registry identifying page use to a kdump kernel. Intended uses are
> wiping of crypto keys on crash, or omitting pages holding e.g. crypto
> keys or unimportant caches from crash dumps.
>
> The registry is a bitmap with one bit for each physical page. The
> meaning of the bits is set by the crash_memaction= cmdline param. When
> not present, no bitmap is allocated. Marking is a lock-free bitmap
> update with no allocation, so it is safe from any context.
>
> The bitmap and its metadata is handed over to the kdump kernel through
> elfcorehdr.
>
> Signed-off-by: Jan Sebastian Götte <linux@jaseg.de>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.dev/#/patchset/20260928-crash-memaction-upstream-20260921-v3-0-e511e9ee2329@jaseg.de?part=1
next prev parent reply other threads:[~2026-09-28 17:36 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-28 17:17 [PATCH v3 00/12] CRASH_MEMACTION: describe pages to a kdump kernel (was: CRASH_WIPE_SECRETS) Jan Sebastian Götte
2026-09-28 17:17 ` [PATCH v3 01/12] kexec: Add a crash memaction registry Jan Sebastian Götte
2026-09-28 17:36 ` sashiko-bot [this message]
2026-09-28 17:17 ` [PATCH v3 02/12] lib, kexec: Add a secret pool for key material Jan Sebastian Götte
2026-09-28 17:36 ` sashiko-bot
2026-09-28 17:17 ` [PATCH v3 03/12] mm: Wire up the crash memaction registry Jan Sebastian Götte
2026-09-28 17:38 ` sashiko-bot
2026-09-28 17:17 ` [PATCH v3 04/12] arm64: Enable " Jan Sebastian Götte
2026-09-28 17:35 ` sashiko-bot
2026-09-28 17:17 ` [PATCH v3 05/12] dm crypt: Allocate key material from the secret pool Jan Sebastian Götte
2026-09-28 17:33 ` sashiko-bot
2026-09-28 17:17 ` [PATCH v3 06/12] crypto: api - Allocate tfms " Jan Sebastian Götte
2026-09-28 17:32 ` sashiko-bot
2026-09-28 17:17 ` [PATCH v3 07/12] security/keys: Allocate key payloads " Jan Sebastian Götte
2026-09-28 17:32 ` sashiko-bot
2026-09-28 17:17 ` [PATCH v3 08/12] mm: Add VM_CRASH_MARK Jan Sebastian Götte
2026-09-28 17:34 ` sashiko-bot
2026-09-28 17:17 ` [PATCH v3 09/12] mm/rmap: Mark folios mapped into crash_memaction-marked VMAs Jan Sebastian Götte
2026-09-28 17:41 ` sashiko-bot
2026-09-28 17:17 ` [PATCH v3 10/12] mm/madvise: Add MADV_CRASH_SECRET, MADV_CRASH_CACHE and MADV_CRASH_RESET Jan Sebastian Götte
2026-09-28 17:35 ` sashiko-bot
2026-09-28 17:17 ` [PATCH v3 11/12] Documentation/mm: Document the crash memaction registry Jan Sebastian Götte
2026-09-28 17:31 ` sashiko-bot
2026-09-28 17:18 ` [PATCH v3 12/12] kexec: Expose the crash memaction bitmap in debugfs Jan Sebastian Götte
2026-09-28 17:38 ` sashiko-bot
2026-09-28 19:19 ` Randy Dunlap
2026-09-28 17:49 ` [PATCH v3 00/12] CRASH_MEMACTION: describe pages to a kdump kernel (was: CRASH_WIPE_SECRETS) Lorenzo Stoakes (ARM)
2026-09-28 18:58 ` David Hildenbrand (Arm)
2026-09-28 19:02 ` David Hildenbrand (Arm)
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