When I ran an rsync on my machine I use for backups, it eventually hits this trace.. kernel BUG at mm/page_alloc.c:2016! invalid opcode: 0000 [#1] SMP RIP: move_freepages_block+0x120/0x2d0 CPU: 3 PID: 0 Comm: swapper/3 Not tainted 4.18.0-rc4-backup+ #1 Hardware name: ASUS All Series/Z97-DELUXE, BIOS 2602 08/18/2015 RIP: 0010:move_freepages_block+0x120/0x2d0 Code: 05 48 01 c8 74 3b f6 00 02 74 36 48 8b 03 48 c1 e8 3e 48 8d 0c 40 48 8b 86 c0 7f 00 00 48 c1 e8 3e 48 8d 04 40 48 39 c8 74 17 <0f> 0b 45 31 f6 48 83 c4 28 44 89 f0 5b 5d 41 5c 41 5d 41 5e 41 5f RSP: 0018:ffff88043fac3af8 EFLAGS: 00010093 RAX: 0000000000000000 RBX: ffffea0002e20000 RCX: 0000000000000003 RDX: 0000000000000000 RSI: ffffea0002e20000 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffff88043fac3b5c R09: ffffffff9295e110 R10: ffff88043fdf4000 R11: ffffea0002e20008 R12: ffffea0002e20000 R13: ffffffff9295dd40 R14: 0000000000000008 R15: ffffea0002e27fc0 FS: 0000000000000000(0000) GS:ffff88043fac0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2a75f71fe8 CR3: 00000001e380f006 CR4: 00000000001606e0 Call Trace: <IRQ> ? lock_acquire+0xe6/0x1dc steal_suitable_fallback+0x152/0x1a0 get_page_from_freelist+0x1029/0x1650 ? free_debug_processing+0x271/0x410 __alloc_pages_nodemask+0x111/0x310 page_frag_alloc+0x74/0x120 __netdev_alloc_skb+0x95/0x110 e1000_alloc_rx_buffers+0x225/0x2b0 e1000_clean_rx_irq+0x2ee/0x450 e1000e_poll+0x7c/0x2e0 net_rx_action+0x273/0x4d0 __do_softirq+0xc6/0x4d6 irq_exit+0xbb/0xc0 do_IRQ+0x60/0x110 common_interrupt+0xf/0xf </IRQ> RIP: 0010:cpuidle_enter_state+0xb5/0x390 Code: 89 04 24 0f 1f 44 00 00 31 ff e8 86 26 64 ff 80 7c 24 0f 00 0f 85 fb 01 00 00 e8 66 02 66 ff fb 48 ba cf f7 53 e3 a5 9b c4 20 <48> 8b 0c 24 4c 29 f9 48 89 c8 48 c1 f9 3f 48 f7 ea b8 ff ff ff 7f RSP: 0018:ffffc900000abe70 EFLAGS: 00000202 ORIG_RAX: ffffffffffffffdc RAX: ffff880107fe8040 RBX: 0000000000000003 RCX: 0000000000000001 RDX: 20c49ba5e353f7cf RSI: 0000000000000001 RDI: ffff880107fe8040 RBP: ffff88043fae8c20 R08: 0000000000000001 R09: 0000000000000018 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff928fb7d8 R13: 0000000000000003 R14: 0000000000000003 R15: 0000015e55aecf23 do_idle+0x128/0x230 cpu_startup_entry+0x6f/0x80 start_secondary+0x192/0x1f0 secondary_startup_64+0xa5/0xb0 NMI watchdog: Watchdog detected hard LOCKUP on cpu 4 Everything then locks up & rebooots. It's fairly reproduceable, though every time I run it my rsync gets further, and eventually I suspect it won't create enough load to reproduce. 2006 #ifndef CONFIG_HOLES_IN_ZONE 2007 /* 2008 * page_zone is not safe to call in this context when 2009 * CONFIG_HOLES_IN_ZONE is set. This bug check is probably redundant 2010 * anyway as we check zone boundaries in move_freepages_block(). 2011 * Remove at a later date when no bug reports exist related to 2012 * grouping pages by mobility 2013 */ 2014 VM_BUG_ON(pfn_valid(page_to_pfn(start_page)) && 2015 pfn_valid(page_to_pfn(end_page)) && 2016 page_zone(start_page) != page_zone(end_page)); 2017 #endif 2018 Dave
