Commit 1bc67ca6 authored by Qi Zheng's avatar Qi Zheng Committed by Andrew Morton
Browse files

mm: page_alloc: call panic() when memoryless node allocation fails 

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: default avatarQi Zheng <zhengqi.arch@bytedance.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 9f550d78

mm/page_alloc.c

+3 −5
Original line number Diff line number Diff line
@@ -8405,11 +8405,9 @@ void __init free_area_init(unsigned long *max_zone_pfn) 


			/* Allocator not initialized yet */

			pgdat = arch_alloc_nodedata(nid);

			if (!pgdat) {

				pr_err("Cannot allocate %zuB for node %d.\n",

			if (!pgdat)

				panic("Cannot allocate %zuB for node %d.\n",

				       sizeof(*pgdat), nid);

				continue;

			}

			arch_refresh_nodedata(nid, pgdat);

			free_area_init_memoryless_node(nid);