More huge page fun reported by one of our users today.. > https://bugzilla.redhat.com/show_bug.cgi?id=923817 > > kernel BUG at mm/huge_memory.c:1802! > invalid opcode: 0000 [#1] SMP > Modules linked in: arc4 md4 nls_utf8 cifs dns_resolver fscache fuse tun lockd > sunrpc ip6t_REJECT nf_conntrack_ipv6 nf_conntrack_ipv4 nf_defrag_ipv6 > nf_defrag_ipv4 xt_conntrack nf_conntrack ip6table_filter ip6_tables binfmt_misc > snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep > iTCO_wdt iTCO_vendor_support snd_seq snd_seq_device snd_pcm snd_page_alloc > snd_timer snd e1000e coretemp mei lpc_ich soundcore mfd_core kvm_intel dcdbas > kvm serio_raw i2c_i801 microcode uinput dm_crypt crc32c_intel > ghash_clmulni_intel i915 i2c_algo_bit drm_kms_helper drm video i2c_core > CPU 0 > Pid: 2125, comm: JS GC Helper Not tainted 3.8.3-203.fc18.x86_64 #1 Dell Inc. > OptiPlex 790/0J3C2F > RIP: 0010:[<ffffffff8118edd1>] [<ffffffff8118edd1>] > split_huge_page+0x751/0x7e0 > RSP: 0018:ffff8801f9f4db98 EFLAGS: 00010297 > RAX: 0000000000000001 RBX: ffffea0000b48000 RCX: 000000000000005b > RDX: 0000000000000008 RSI: 0000000000000046 RDI: 0000000000000246 > RBP: ffff8801f9f4dc58 R08: 000000000000000a R09: 000000000000034a > R10: 0000000000000000 R11: 0000000000000349 R12: 0000000000000000 > R13: 00007fb66765d000 R14: 00003ffffffff000 R15: ffffea0000b48000 > FS: 00007fb6b0f33700(0000) GS:ffff88022dc00000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 00007fb69a7e8200 CR3: 00000001cfc04000 CR4: 00000000000407f0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 > Process JS GC Helper (pid: 2125, threadinfo ffff8801f9f4c000, task > ffff880200bd9760) > Stack: > ffff8801f9f4dbe8 0000000000000292 ffff8801f9f4dbc8 0000000000000004 > ffffea0000bbd3c0 ffff8801f7a32d40 0000000000b48000 ffffffff8113a5f7 > 0000000000000003 ffffc90000000001 00000000f9f4dbf8 00000007fb667600 > Call Trace: > [<ffffffff8113a5f7>] ? free_pcppages_bulk+0x177/0x4f0 > [<ffffffff81198271>] ? mem_cgroup_bad_page_check+0x21/0x30 > [<ffffffff8113ab8d>] ? free_pages_prepare+0x8d/0x140 > [<ffffffff811903d3>] __split_huge_page_pmd+0x133/0x370 > [<ffffffff8115c4fa>] unmap_single_vma+0x7ea/0x880 > [<ffffffff811709dd>] ? free_pages_and_swap_cache+0xad/0xd0 > [<ffffffff8115ce7d>] zap_page_range+0x9d/0x100 > [<ffffffff8109797f>] ? __dequeue_entity+0x2f/0x50 > [<ffffffff81159863>] sys_madvise+0x263/0x740 > [<ffffffff810df18c>] ? __audit_syscall_exit+0x20c/0x2c0 > [<ffffffff81658699>] system_call_fastpath+0x16/0x1b > Code: 0f 0b 0f 0b f3 90 49 8b 07 a9 00 00 00 01 75 f4 e9 d8 fa ff ff be 45 01 > 00 00 48 c7 c7 8d 09 9d 81 e8 a4 f8 ec ff e9 c2 fa ff ff <0f> 0b 41 8b 57 18 8b > 75 94 48 c7 c7 d0 0b 9f 81 31 c0 83 c2 01 > RIP [<ffffffff8118edd1>] split_huge_page+0x751/0x7e0 > RSP <ffff8801f9f4db98> BUG_ON(mapcount != page_mapcount(page)); Dave -- 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>