From: Wupeng Ma <mawupeng1@huawei.com>
To: <akpm@linux-foundation.org>, <rppt@kernel.org>
Cc: <linux-mm@kvack.org>, <mawupeng1@huawei.com>,
<linux-kernel@vger.kernel.org>
Subject: [PATCH] efi: Disable mirror feature during crashkernel
Date: Tue, 9 Jan 2024 12:15:36 +0800 [thread overview]
Message-ID: <20240109041536.3903042-1-mawupeng1@huawei.com> (raw)
From: Ma Wupeng <mawupeng1@huawei.com>
If system have no mirrored memory or use crashkernel.high while
kernelcore=mirror is enabled in cmdline, during crashkernel,
there will be limited mirrored memory and this usually lead to
OOM.
To solve this problem, disable mirror feature during crashkernel.
Signed-off-by: Ma Wupeng <mawupeng1@huawei.com>
---
mm/mm_init.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/mm/mm_init.c b/mm/mm_init.c
index 077bfe393b5e..513bad672708 100644
--- 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_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;
--
2.25.1
next reply other threads:[~2024-01-09 4:15 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-09 4:15 Wupeng Ma [this message]
2024-01-09 6:05 ` [PATCH] efi: Disable mirror feature during crashkernel Mike Rapoport
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20240109041536.3903042-1-mawupeng1@huawei.com \
--to=mawupeng1@huawei.com \
--cc=akpm@linux-foundation.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=rppt@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).