kernel启动出现swapper 进程错误

BUG: Bad page state in process swapper  pfn:3093f
page:c04d97e0 flags:00010000 count:0 mapcount:0 mapping:00100000 index:40000
Backtrace:
[<c00321e0>] (dump_backtrace+0x0/0x10c) from [<c0338cdc>] (dump_stack+0x18/0x1c)
r7:00000020 r6:c04b5cf4 r5:c04d97e0 r4:00040000
[<c0338cc4>] (dump_stack+0x0/0x1c) from [<c0077edc>] (bad_page+0xd0/0x140)
[<c0077e0c>] (bad_page+0x0/0x140) from [<c00787a4>] (__free_pages_ok+0xb0/0x1b4)
r6:00000000 r5:00000020 r4:c04d97e0
[<c00786f4>] (__free_pages_ok+0x0/0x1b4) from [<c0078b98>] (__free_pages+0x40/0x4c)
[<c0078b58>] (__free_pages+0x0/0x4c) from [<c00200f0>] (__free_pages_bootmem+0x78/0x9c)
r5:c04c6000 r4:00000005
[<c0020078>] (__free_pages_bootmem+0x0/0x9c) from [<c0010808>] (free_all_bootmem_core+0x258/0x280)
r5:c04c6000 r4:ffffffff
[<c00105b0>] (free_all_bootmem_core+0x0/0x280) from [<c0010864>] (free_all_bootmem_node+0x14/0x18)
[<c0010850>] (free_all_bootmem_node+0x0/0x18) from [<c000a728>] (mem_init+0x1cc/0x22c)
[<c000a55c>] (mem_init+0x0/0x22c) from [<c00088b4>] (start_kernel+0x118/0x264)
r8:300201b4 r7:c0458448 r6:c0021c9c r5:c0492240 r4:c0021ca0
[<c000879c>] (start_kernel+0x0/0x264) from [<30008034>] (0x30008034)
r5:c0492550 r4:c0007175
Disabling lock debugging due to kernel taint

在kernel配置选项里面根本就没有选swapper这个选项，但却出现这个进程错误，这个内核在其他板子上运行正常，我是自己做的板子，现在怀疑是板子的稳定性问题，但进入内核后能够很稳定的运行，播放电影什么的都很稳定，下一步计划降低cpu主频以检查问题所在，希望高手帮忙看看，这里留下个问题，内核里如何降低cpu的主频，就像uboot一样，可以初始化cpu的主频，有大侠知道的忘赐教，以节省我找代码的时间。