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efi: disable mirror feature during crashkernel 

commit 7ea6ec4c25 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@huawei.com
Signed-off-by: Ma Wupeng <mawupeng1@huawei.com>
Acked-by: Mike Rapoport (IBM) <rppt@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ma Wupeng 2024-01-09 12:15:36 +08:00 committed by Greg Kroah-Hartman
parent f66509fd27
commit 8afa41bb2d
1 changed files with 6 additions and 0 deletions
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6
mm/mm_init.c
View File

@ -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_pfns_for_nodes(void)
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;