[PATCH 4/4] kho: rename kho_scratch= commandline parameter to kho_bootmem=

Pratyush Yadav pratyush at kernel.org
Tue Aug 11 09:26:40 PDT 2026


From: "Pratyush Yadav (Google)" <pratyush at kernel.org>

KHO now no longer uses "scratch" to describe the memory areas passed by
previous kernel. Instead, it calls them boot memory, or bootmem in
short. Rename the kho_scratch= commandline parameter to reflect this
terminology change.

Signed-off-by: Pratyush Yadav (Google) <pratyush at kernel.org>
---
 Documentation/admin-guide/kernel-parameters.txt | 2 +-
 Documentation/admin-guide/mm/kho.rst            | 4 ++--
 kernel/liveupdate/kexec_handover.c              | 6 +++---
 3 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index e2212f058812..a03927ffb85d 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -2989,7 +2989,7 @@ Kernel parameters
 			"0" | "off" | "n" - kexec handover is disabled
 			"1" | "on" | "y" - kexec handover is enabled
 
-	kho_scratch=	[KEXEC,EARLY]
+	kho_bootmem=	[KEXEC,EARLY]
 			Format: ll[KMG],mm[KMG],nn[KMG] | nn%
 
 			Defines the size of the KHO boot memory region. The
diff --git a/Documentation/admin-guide/mm/kho.rst b/Documentation/admin-guide/mm/kho.rst
index 4fae09096038..f14c8d9ad6a4 100644
--- a/Documentation/admin-guide/mm/kho.rst
+++ b/Documentation/admin-guide/mm/kho.rst
@@ -20,8 +20,8 @@ need to enable if you would like to preserve their respective state across
 kexec.
 
 To use KHO, please boot the kernel with the ``kho=on`` command line
-parameter. You may use ``kho_scratch`` parameter to define size of the
-boot memory regions. For example ``kho_scratch=16M,512M,256M`` will reserve a
+parameter. You may use ``kho_bootmem`` parameter to define size of the
+boot memory regions. For example ``kho_bootmem=16M,512M,256M`` will reserve a
 16 MiB low memory bootmem area, a 512 MiB global bootmem region, and 256 MiB
 per NUMA node bootmem regions on boot.
 
diff --git a/kernel/liveupdate/kexec_handover.c b/kernel/liveupdate/kexec_handover.c
index 3bfdbe86aaf9..da8d5ecb915b 100644
--- a/kernel/liveupdate/kexec_handover.c
+++ b/kernel/liveupdate/kexec_handover.c
@@ -669,12 +669,12 @@ unsigned int kho_bootmem_cnt;
  * The bootmem areas are scaled by default as percent of memory allocated from
  * memblock. A user can override the scale with command line parameter:
  *
- * kho_scratch=N%
+ * kho_bootmem=N%
  *
  * It is also possible to explicitly define size for a lowmem, a global and
  * per-node bootmem areas:
  *
- * kho_scratch=l[KMG],n[KMG],m[KMG]
+ * kho_bootmem=l[KMG],n[KMG],m[KMG]
  *
  * The explicit size definition takes precedence over scale definition.
  */
@@ -749,7 +749,7 @@ static int __init kho_parse_bootmem_size(char *p)
 
 	return 0;
 }
-early_param("kho_scratch", kho_parse_bootmem_size);
+early_param("kho_bootmem", kho_parse_bootmem_size);
 
 static void __init bootmem_size_update(void)
 {
-- 
2.55.0.679.g6767b8d81c-goog




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