On Thu, Apr 9, 2015 at 2:12 AM, Julian Calaby <julian.calaby@xxxxxxxxx> wrote: > Hi Konstantin, > > On Thu, Apr 9, 2015 at 3:04 AM, Konstantin Khlebnikov > <khlebnikov@xxxxxxxxxxxxxx> wrote: >> On 08.04.2015 19:59, Konstantin Khlebnikov wrote: >>> >>> Node 0 might be offline as well as any other numa node, >>> in this case kernel cannot handle memory allocation and crashes. >> >> >> Example: >> >> [ 0.027133] ------------[ cut here ]------------ >> [ 0.027938] kernel BUG at include/linux/gfp.h:322! >> [ 0.028000] invalid opcode: 0000 [#1] SMP >> [ 0.028000] Modules linked in: >> [ 0.028000] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.0.0-rc7 #12 >> [ 0.028000] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS >> rel-1.7.5.1-0-g8936dbb-20141113_115728-nilsson.home.kraxel.org 04/01/2014 >> [ 0.028000] task: ffff88007d3f8000 ti: ffff88007d3dc000 task.ti: >> ffff88007d3dc000 >> [ 0.028000] RIP: 0010:[<ffffffff8118574c>] [<ffffffff8118574c>] >> new_slab+0x30c/0x3c0 >> [ 0.028000] RSP: 0000:ffff88007d3dfc28 EFLAGS: 00010246 >> [ 0.028000] RAX: 0000000000000000 RBX: ffff88007d001800 RCX: >> 0000000000000001 >> [ 0.028000] RDX: 0000000000000000 RSI: 0000000000000000 RDI: >> 00000000002012d0 >> [ 0.028000] RBP: ffff88007d3dfc58 R08: 0000000000000000 R09: >> 0000000000000000 >> [ 0.028000] R10: 0000000000000001 R11: ffff88007d02fe40 R12: >> 00000000000000d0 >> [ 0.028000] R13: 00000000000000c0 R14: 0000000000000015 R15: >> 0000000000000000 >> [ 0.028000] FS: 0000000000000000(0000) GS:ffff88007fc00000(0000) >> knlGS:0000000000000000 >> [ 0.028000] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b >> [ 0.028000] CR2: 00000000ffffffff CR3: 0000000001e0e000 CR4: >> 00000000000006f0 >> [ 0.028000] DR0: 0000000000000000 DR1: 0000000000000000 DR2: >> 0000000000000000 >> [ 0.028000] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: >> 0000000000000400 >> [ 0.028000] Stack: >> [ 0.028000] 0000000000000000 ffff88007fc175d0 ffffea0001f40bc0 >> 00000000000000c0 >> [ 0.028000] ffff88007d001800 00000000000080d0 ffff88007d3dfd48 >> ffffffff8192da27 >> [ 0.028000] 000000000000000d ffffffff81e27038 0000000000000000 >> 0000000000000000 >> [ 0.028000] Call Trace: >> [ 0.028000] [<ffffffff8192da27>] __slab_alloc+0x3df/0x55d >> [ 0.028000] [<ffffffff8109a92b>] ? __lock_acquire+0xc1b/0x1f40 >> [ 0.028000] [<ffffffff810b1f2c>] ? __irq_domain_add+0x3c/0xe0 >> [ 0.028000] [<ffffffff810998f5>] ? trace_hardirqs_on_caller+0x105/0x1d0 >> [ 0.028000] [<ffffffff813631ab>] ? trace_hardirqs_on_thunk+0x3a/0x3f >> [ 0.028000] [<ffffffff811890ab>] __kmalloc_node+0xab/0x210 >> [ 0.028000] [<ffffffff810394df>] ? ioapic_read_entry+0x1f/0x50 >> [ 0.028000] [<ffffffff810b1f2c>] ? __irq_domain_add+0x3c/0xe0 >> [ 0.028000] [<ffffffff810b1f2c>] __irq_domain_add+0x3c/0xe0 >> [ 0.028000] [<ffffffff81039e0e>] mp_irqdomain_create+0x9e/0x120 >> [ 0.028000] [<ffffffff81f22d49>] setup_IO_APIC+0x6b/0x798 >> [ 0.028000] [<ffffffff810398a5>] ? clear_IO_APIC+0x45/0x70 >> [ 0.028000] [<ffffffff81f21f01>] apic_bsp_setup+0x87/0x96 >> [ 0.028000] [<ffffffff81f1fdb4>] native_smp_prepare_cpus+0x237/0x275 >> [ 0.028000] [<ffffffff81f131b7>] kernel_init_freeable+0x120/0x265 >> [ 0.028000] [<ffffffff819271f9>] ? kernel_init+0x9/0xf0 >> [ 0.028000] [<ffffffff819271f0>] ? rest_init+0x130/0x130 >> [ 0.028000] [<ffffffff819271f9>] kernel_init+0x9/0xf0 >> [ 0.028000] [<ffffffff8193b958>] ret_from_fork+0x58/0x90 >> [ 0.028000] [<ffffffff819271f0>] ? rest_init+0x130/0x130 >> [ 0.028000] Code: 6b b6 ff ff 49 89 c5 e9 ce fd ff ff 31 c0 90 e9 74 ff >> ff ff 49 c7 04 04 00 00 00 00 e9 05 ff ff ff 4c 89 e7 ff d0 e9 d9 fe ff ff >> <0f> 0b 4c 8b 73 38 44 89 e7 81 cf 00 00 20 00 4c 89 f6 48 c1 ee >> [ 0.028000] RIP [<ffffffff8118574c>] new_slab+0x30c/0x3c0 >> [ 0.028000] RSP <ffff88007d3dfc28> >> [ 0.028039] ---[ end trace f03690e70d7e4be6 ]--- > > Shouldn't this be in the commit message? I don't think that this will help somebody, kernel crashes here only on rare hardware setup. This stack came from especially patched qemu (because normal cannot configure memory-less nore 0) > > Thanks, > > -- > Julian Calaby > > Email: julian.calaby@xxxxxxxxx > Profile: http://www.google.com/profiles/julian.calaby/ > > -- > 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> -- 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>