linux-kernel - [PATCH v2] Documentation, mm/unaccepted: document accept

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Message-Id: <20231214-accept_memory_param-v2-1-f38cd20a0247@suse.cz>
Date:   Thu, 14 Dec 2023 13:22:52 +0100
From:   Vlastimil Babka <vbabka@...e.cz>
To:     Jonathan Corbet <corbet@....net>
Cc:     linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        Tim Chen <tim.c.chen@...ux.intel.com>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Vlastimil Babka <vbabka@...e.cz>
Subject: [PATCH v2] Documentation, mm/unaccepted: document accept_memory
 kernel parameter

The accept_memory kernel parameter was added in commit dcdfdd40fa82
("mm: Add support for unaccepted memory") but not listed in the
kernel-parameters doc. Add it there.

Acked-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
Signed-off-by: Vlastimil Babka <vbabka@...e.cz>
---
changes since v1:
- use shorter sentences (Tim Chen)
---
 Documentation/admin-guide/kernel-parameters.txt | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 65731b060e3f..91bd74b2e203 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -1,3 +1,14 @@
+	accept_memory=  [MM]
+			Format: { eager | lazy }
+			default: lazy
+			By default, unaccepted memory is accepted lazily to
+			avoid prolonged boot times. The lazy option will add
+			some runtime overhead until all memory is eventually
+			accepted. In most cases the overhead is negligible.
+			For some workloads or for debugging purposes
+			accept_memory=eager can be used to accept all memory
+			at once during boot.
+
 	acpi=		[HW,ACPI,X86,ARM64,RISCV64]
 			Advanced Configuration and Power Interface
 			Format: { force | on | off | strict | noirq | rsdt |

---
base-commit: a39b6ac3781d46ba18193c9dbb2110f31e9bffe9
change-id: 20231214-accept_memory_param-af395e3a2d45

Best regards,
-- 
Vlastimil Babka <vbabka@...e.cz>