On 2023/8/2 15:23, Wupeng Ma wrote:
From: Ma Wupeng <mawupeng1@xxxxxxxxxx> For system with kernelcore=mirror enabled while no mirrored memory is reported by efi. This could lead to kernel OOM during startup since all memory beside zone DMA are in the movable zone and this prevents the kernel to use it. Zone DMA/DMA32 initialization is independent of mirrored memory and their max pfn is set in zone_sizes_init(). Since kernel can fallback to zone DMA/DMA32 if there is no memory in zone Normal, these zones are seen as mirrored memory no mather their memory attributes are. To solve this problem, disable kernelcore=mirror when there is no real mirrored memory exists. Suggested-by: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx> Suggested-by: Mike Rapoport <rppt@xxxxxxxxxx> Signed-off-by: Ma Wupeng <mawupeng1@xxxxxxxxxx>
Reviewed-by: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
