Hi all, CONFIG_KMEMCHECK=y and set command-line "kmemcheck=1", I find OS boot failed. The kernel is v3.14.0-rc3 If set "kmemcheck=1 nowatchdog", OS will boot successfully. Here is the boot failed log: [ 23.586826] Freeing unused kernel memory: 1160K (ffff8800014de000 - ffff88000 1600000) [ 23.600248] Freeing unused kernel memory: 1696K (ffff880001858000 - ffff88000 1a00000) [ 23.615534] Kernel panic - not syncing: Attempted to kill init! exitcode=0x00 000005 [ 23.615534] [ 23.624885] CPU: 0 PID: 1 Comm: init Tainted: G W 3.14.0-rc3-0.1-de fault+ #1 [ 23.632957] Hardware name: Huawei Technologies Co., Ltd. Tecal RH2285 /BC11BTSA , BIOS CTSAV036 04/27/2011 [ 23.644661] ffff880c1dd28000 ffff880c1dd31c48 ffffffff814ca491 ffff880c1dd31 cc8 [ 23.652416] ffffffff814ca1e6 0000000000000010 ffff880c1dd31cd8 ffff880c1dd31 c78 [ 23.660171] 0000000000000027 ffff880c1dcb8280 0000000000000005 ffff880c1dd28 000 [ 23.667931] Call Trace: [ 23.670482] [<ffffffff814ca491>] dump_stack+0x6a/0x79 [ 23.675712] [<ffffffff814ca1e6>] panic+0xb9/0x1f4 [ 23.680599] [<ffffffff8104f78e>] forget_original_parent+0x42e/0x430 [ 23.687043] [<ffffffff81107da0>] ? perf_cgroup_switch+0x170/0x170 [ 23.693314] [<ffffffff8104f7a1>] exit_notify+0x11/0x140 [ 23.698722] [<ffffffff8104fb00>] do_exit+0x230/0x490 [ 23.703865] [<ffffffff8104fda3>] do_group_exit+0x43/0xb0 [ 23.709357] [<ffffffff8105fb31>] get_signal_to_deliver+0x241/0x4b0 [ 23.715713] [<ffffffff81002a0c>] do_notify_resume+0xac/0x1a0 [ 23.721551] [<ffffffff814d712a>] int_signal+0x12/0x17 [ 23.726786] Kernel Offset: 0x0 from 0xffffffff81000000 (relocation range: 0xf fffffff80000000-0xffffffff9fffffff) -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>