Hello all, I found the below kernel bug using latest mainline(637704cbc95), my hardware has 2 numa nodes, and it's easy to reproduce the issue using LTP test case: "# ./mmap10 -a -s -c 200": [root@localhost linux]# cat .config | grep NUMA CONFIG_ARCH_SUPPORTS_NUMA_BALANCING=y CONFIG_ARCH_WANTS_PROT_NUMA_PROT_NONE=y CONFIG_ARCH_USES_NUMA_PROT_NONE=y CONFIG_NUMA_BALANCING_DEFAULT_ENABLED=y CONFIG_NUMA_BALANCING=y # CONFIG_X86_NUMACHIP is not set CONFIG_NUMA=y CONFIG_AMD_NUMA=y CONFIG_X86_64_ACPI_NUMA=y # CONFIG_NUMA_EMU is not set CONFIG_USE_PERCPU_NUMA_NODE_ID=y CONFIG_ACPI_NUMA=y ----------------------------------------------------------- [ 588.143072] mapcount 0 page_mapcount 3 [ 588.147471] ------------[ cut here ]------------ [ 588.152856] kernel BUG at mm/huge_memory.c:1798! [ 588.158125] invalid opcode: 0000 [#1] SMP [ 588.162882] Modules linked in: ip6table_filter ip6_tables ebtable_nat ebtables bnep bluetooth rfkill iptable_mangle ipt_REJECT nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack iptable_filter ip_tables be2iscsi iscsi_boot_sysfs bnx2i cnic uio cxgb4i cxgb4 cxgb3i cxgb3 mdio libcxgbi ib_iser rdma_cm ib_addr iw_cm ib_cm ib_sa ib_mad ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi vfat fat dm_mirror dm_region_hash dm_log dm_mod cdc_ether iTCO_wdt i7core_edac coretemp usbnet iTCO_vendor_support mii crc32c_intel edac_core lpc_ich shpchp ioatdma mfd_core i2c_i801 pcspkr serio_raw bnx2 microcode dca vhost_net tun macvtap macvlan kvm_intel kvm uinput mgag200 sr_mod cdrom i2c_algo_bit sd_mod drm_kms_helper crc_t10dif ata_generic pata_acpi ttm ata_piix drm libata i2c_core megaraid_sas [ 588.246517] CPU 1 [ 588.248636] Pid: 23217, comm: mmap10 Not tainted 3.8.0-rc1mainline+ #17 IBM IBM System x3400 M3 Server -[7379I08]-/69Y4356 [ 588.262171] RIP: 0010:[<ffffffff8118fac7>] [<ffffffff8118fac7>] __split_huge_page+0x677/0x6d0 [ 588.272067] RSP: 0000:ffff88017a03fc08 EFLAGS: 00010293 [ 588.278235] RAX: 0000000000000003 RBX: ffff88027a6c22e0 RCX: 00000000000034d2 [ 588.286394] RDX: 000000000000748b RSI: 0000000000000046 RDI: 0000000000000246 [ 588.294216] RBP: ffff88017a03fcb8 R08: ffffffff819d2440 R09: 000000000000054a [ 588.302441] R10: 0000000000aaaaaa R11: 00000000ffffffff R12: 0000000000000000 [ 588.310495] R13: 00007f4f11a00000 R14: ffff880179e96e00 R15: ffffea0005c08000 [ 588.318640] FS: 00007f4f11f4a740(0000) GS:ffff88017bc20000(0000) knlGS:0000000000000000 [ 588.327894] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 588.334569] CR2: 00000037e9ebb404 CR3: 000000017a436000 CR4: 00000000000007e0 [ 588.342718] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 588.350861] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 588.359134] Process mmap10 (pid: 23217, threadinfo ffff88017a03e000, task ffff880172dd32e0) [ 588.368667] Stack: [ 588.370960] ffff88017a540ec8 ffff88017a03fc20 ffffffff816017b5 ffff88017a03fc88 [ 588.379566] ffffffff812fa014 0000000000000000 ffff880279ebd5c0 00000000f4f11a4c [ 588.388150] 00000007f4f11f49 00000007f4f11a00 ffff88017a540ef0 ffff88017a540ee8 [ 588.396711] Call Trace: [ 588.455106] [<ffffffff816017b5>] ? rwsem_down_read_failed+0x15/0x17 [ 588.518106] [<ffffffff812fa014>] ? call_rwsem_down_read_failed+0x14/0x30 [ 588.580897] [<ffffffff815ffc04>] ? down_read+0x24/0x2b [ 588.642630] [<ffffffff8118fb88>] split_huge_page+0x68/0xb0 [ 588.703814] [<ffffffff81190ed4>] __split_huge_page_pmd+0x134/0x330 [ 588.766064] [<ffffffff8104b997>] ? pte_alloc_one+0x37/0x50 [ 588.826460] [<ffffffff81191121>] split_huge_page_pmd_mm+0x51/0x60 [ 588.887746] [<ffffffff8119116b>] split_huge_page_address+0x3b/0x50 [ 588.948673] [<ffffffff8119121c>] __vma_adjust_trans_huge+0x9c/0xf0 [ 589.008660] [<ffffffff811650f4>] vma_adjust+0x684/0x750 [ 589.066328] [<ffffffff811653ba>] __split_vma.isra.28+0x1fa/0x220 [ 589.123497] [<ffffffff810135d1>] ? __switch_to+0x181/0x4a0 [ 589.180704] [<ffffffff811661a9>] do_munmap+0xf9/0x420 [ 589.237461] [<ffffffff8160026c>] ? __schedule+0x3cc/0x7b0 [ 589.294520] [<ffffffff8116651e>] vm_munmap+0x4e/0x70 [ 589.350784] [<ffffffff8116741b>] sys_munmap+0x2b/0x40 [ 589.406971] [<ffffffff8160a159>] system_call_fastpath+0x16/0x1b [ 589.464792] Code: 49 8b 07 a9 00 00 00 01 75 f4 e9 2d fb ff ff 41 8b 4f 18 8b 75 8c 48 c7 c7 f8 27 81 81 31 c0 83 c1 01 e8 df 63 46 00 0f 0b 0f 0b <0f> 0b 41 8b 57 18 8b 75 8c 48 c7 c7 d8 27 81 81 31 c0 83 c2 01 [ 589.595165] RIP [<ffffffff8118fac7>] __split_huge_page+0x677/0x6d0 [ 589.656000] RSP <ffff88017a03fc08> [ 589.713937] ---[ end trace bff29bee67936f30 ]--- -- Thanks, Zhouping -- 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>