+ mm-page_alloc-call-panic-when-memoryless-node-allocation-fails.patch added to mm-unstable branch

+ mm-page_alloc-call-panic-when-memoryless-node-allocation-fails.patch added to mm-unstable branch

[Andrew Morton]

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@bytedance.com>
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@bytedance.com
Signed-off-by: Qi Zheng <zhengqi.arch@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---


--- 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@bytedance.com are

mm-page_alloc-call-panic-when-memoryless-node-allocation-fails.patch