The patch titled
Subject: mm: page_alloc: call panic() when memoryless node allocation fails
has been added to the -mm mm-unstable branch. Its filename is
mm-page_alloc-call-panic-when-memoryless-node-allocation-fails.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-page_alloc-call-panic-when-memoryless-node-allocation-fails.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Qi Zheng <zhengqi.arch@xxxxxxxxxxxxx>
Subject: mm: page_alloc: call panic() when memoryless node allocation fails
Date: Sun, 12 Feb 2023 19:10:27 +0800
In free_area_init(), we will continue to run after allocation of
memoryless node pgdat fails. However, in the subsequent process (such as
when initializing zonelist), the case that NODE_DATA(nid) is NULL is not
handled, which will cause panic. Instead of this, it's better to call
panic() directly when the memory allocation fails during system boot.
Link: https://lkml.kernel.org/r/20230212111027.95520-1-zhengqi.arch@xxxxxxxxxxxxx
Signed-off-by: Qi Zheng <zhengqi.arch@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
--- a/mm/page_alloc.c~mm-page_alloc-call-panic-when-memoryless-node-allocation-fails
+++ a/mm/page_alloc.c
@@ -8422,11 +8422,9 @@ void __init free_area_init(unsigned long
/* Allocator not initialized yet */
pgdat = arch_alloc_nodedata(nid);
- if (!pgdat) {
- pr_err("Cannot allocate %zuB for node %d.\n",
- sizeof(*pgdat), nid);
- continue;
- }
+ if (!pgdat)
+ panic("Cannot allocate %zuB for node %d.\n",
+ sizeof(*pgdat), nid);
arch_refresh_nodedata(nid, pgdat);
free_area_init_memoryless_node(nid);
_
Patches currently in -mm which might be from zhengqi.arch@xxxxxxxxxxxxx are
mm-page_alloc-call-panic-when-memoryless-node-allocation-fails.patch
