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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: Qi Zheng <zhengqi.arch@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Qi Zheng 2023-02-12 19:10:27 +08:00 committed by Andrew Morton
parent 9f550d78b4
commit 1bc67ca65b
1 changed files with 3 additions and 5 deletions
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8
mm/page_alloc.c
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@ -8405,11 +8405,9 @@ void __init free_area_init(unsigned long *max_zone_pfn)
/* Allocator not initialized yet */ /* Allocator not initialized yet */
pgdat = arch_alloc_nodedata(nid); pgdat = arch_alloc_nodedata(nid);
if (!pgdat) { if (!pgdat)
pr_err("Cannot allocate %zuB for node %d.\n", panic("Cannot allocate %zuB for node %d.\n",
sizeof(*pgdat), nid); sizeof(*pgdat), nid);
continue;
}
arch_refresh_nodedata(nid, pgdat); arch_refresh_nodedata(nid, pgdat);
free_area_init_memoryless_node(nid); free_area_init_memoryless_node(nid);