This is a note to let you know that I've just added the patch titled
efi: disable mirror feature during crashkernel
to the 6.7-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
efi-disable-mirror-feature-during-crashkernel.patch
and it can be found in the queue-6.7 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 7ea6ec4c25294e8bc8788148ef854df92ee8dc5e Mon Sep 17 00:00:00 2001
From: Ma Wupeng <mawupeng1@xxxxxxxxxx>
Date: Tue, 9 Jan 2024 12:15:36 +0800
Subject: efi: disable mirror feature during crashkernel
From: Ma Wupeng <mawupeng1@xxxxxxxxxx>
commit 7ea6ec4c25294e8bc8788148ef854df92ee8dc5e upstream.
If the system has no mirrored memory or uses crashkernel.high while
kernelcore=mirror is enabled on the command line then during crashkernel,
there will be limited mirrored memory and this usually leads to OOM.
To solve this problem, disable the mirror feature during crashkernel.
Link: https://lkml.kernel.org/r/20240109041536.3903042-1-mawupeng1@xxxxxxxxxx
Signed-off-by: Ma Wupeng <mawupeng1@xxxxxxxxxx>
Acked-by: Mike Rapoport (IBM) <rppt@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
mm/mm_init.c | 6 ++++++
1 file changed, 6 insertions(+)
--- a/mm/mm_init.c
+++ b/mm/mm_init.c
@@ -26,6 +26,7 @@
#include <linux/pgtable.h>
#include <linux/swap.h>
#include <linux/cma.h>
+#include <linux/crash_dump.h>
#include "internal.h"
#include "slab.h"
#include "shuffle.h"
@@ -381,6 +382,11 @@ static void __init find_zone_movable_pfn
goto out;
}
+ if (is_kdump_kernel()) {
+ pr_warn("The system is under kdump, ignore kernelcore=mirror.\n");
+ goto out;
+ }
+
for_each_mem_region(r) {
if (memblock_is_mirror(r))
continue;
Patches currently in stable-queue which might be from mawupeng1@xxxxxxxxxx are
queue-6.7/efi-disable-mirror-feature-during-crashkernel.patch
