On 08/21/2013 08:58 PM, Libin wrote: > I test it on IBM System x3850 X5 platform, and also trigger oops in boot > process. But if don't config the kmemcheck, it can boot up normally. > Hardware information and oops information as following: > > [ 0.205976] BUG: unable to handle kernel paging request at 000000103f8ae420 > [ 0.249553] IP: [<000000007e372522>] 0x7e372521 > [ 0.278328] PGD 1e90067 PUD 406ff91067 PMD 406fd94067 PTE 800000103f8ae962 > [ 0.321462] Oops: 0000 [#1] SMP > [ 0.342366] Modules linked in: > [ 0.362173] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.11.0-rc6-kmemcheck #3 > [ 0.406711] Hardware name: IBM System x3850 X5 -[7143O3G]-/Node 1, Processor Card, BIOS -[G0E171AUS-1.71]- 09/23/2011 > [ 0.473627] task: ffffffff81a11420 ti: ffffffff81a00000 task.ti: ffffffff81a00000 > [ 0.521570] RIP: 0010:[<000000007e372522>] [<000000007e372522>] 0x7e372521 > [ 0.565103] RSP: 0000:ffffffff81a01e18 EFLAGS: 00010002 > [ 0.598574] RAX: 000000007eb6ce18 RBX: 000000007eb6cda0 RCX: 000000103f8ae400 > [ 0.643109] RDX: 000000007e371b78 RSI: 000000007e372290 RDI: 0000000060000202 > [ 0.687644] RBP: ffffffff81a01f78 R08: 0000000000000000 R09: 0000000000000015 > [ 0.732182] R10: 0000000000000030 R11: 8000000000000000 R12: 000077ff80000000 > [ 0.776720] R13: 0000000000000030 R14: ffff8810bf8ae400 R15: 0000000000000015 > [ 0.821258] FS: 0000000000000000(0000) GS:ffff88103fc00000(0000) knlGS:0000000000000000 > [ 0.872889] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 0.908993] CR2: ffff88103f886d70 CR3: 0000000001a0c000 CR4: 00000000000006b0 > [ 0.953528] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > [ 0.998064] DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400 > [ 1.042598] Stack: > [ 1.056043] 000000007e371a9f 0000000000000030 ffff8810bf8ae400 0000000000000015 > [ 1.103638] ffffffff81a01e48 ffffffff815112d9 000000007e372604 ffffffff8150daf2 > [ 1.151236] 0000000000000015 ffff8810bf8ae400 0000000000000030 0000000000000001 > [ 1.198824] Call Trace: > [ 1.214912] [<ffffffff815112d9>] ? do_page_fault+0x9/0x10 > [ 1.249439] [<ffffffff8150daf2>] ? page_fault+0x22/0x30 > [ 1.282913] [<ffffffff81049b46>] ? efi_call4+0x46/0x80 > [ 1.315859] [<ffffffff81b0add8>] ? efi_enter_virtual_mode+0x105/0x3f2 > [ 1.356711] [<ffffffff81af0128>] start_kernel+0x39f/0x430 > [ 1.391235] [<ffffffff81aefb7b>] ? repair_env_string+0x58/0x58 > [ 1.428397] [<ffffffff81aef4d8>] x86_64_start_reservations+0x1b/0x35 > [ 1.468721] [<ffffffff81aef652>] x86_64_start_kernel+0x160/0x167 > [ 1.506934] Code: Bad RIP value. > [ 1.528367] RIP [<000000007e372522>] 0x7e372521 > [ 1.557667] RSP <ffffffff81a01e18> > [ 1.580072] CR2: 000000103f8ae420 > [ 1.601429] ---[ end trace 26e748e9242ceebc ]--- > [ 1.630684] Kernel panic - not syncing: Attempted to kill the idle task! Isn't that a completely different oops from your first one? In any case, I booted your exact config on my 8-node system. It didn't trigger for me. Being so far down in the sysfs code, I don't have any great recommendations for how to debug it. What I said earlier stands I guess. -- 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>