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[Bug 1497428] Re: kernel BUG at /build/buildd/linux-3.13.0/mm/page_alloc.c:968


For reference, here's a pasted sample of the Oops (taken from Diego's
log above):

[415478.493013] ------------[ cut here ]------------
[415478.496056] kernel BUG at /build/buildd/linux-3.13.0/mm/page_alloc.c:968!
[415478.496056] invalid opcode: 0000 [#1] SMP 
[415478.496056] Modules linked in: dm_crypt syscopyarea sysfillrect sysimgblt fb_sys_fops crct10dif_pclmul crc32_pclmul serio_raw ghash_clmulni_intel isofs aesni_intel aes_x86_64 glue_helper lrw gf128mul ablk_helper cryptd floppy psmouse ixgbevf
[415478.496056] CPU: 1 PID: 11213 Comm: htop Not tainted 3.13.0-48-generic #80-Ubuntu
[415478.496056] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/06/2015
[415478.496056] task: ffff880037758000 ti: ffff8803c9dbe000 task.ti: ffff8803c9dbe000
[415478.496056] RIP: 0010:[<ffffffff81154714>]  [<ffffffff81154714>] move_freepages+0x104/0x110
[415478.496056] RSP: 0018:ffff8803c9dbfbd0  EFLAGS: 00010006
[415478.496056] RAX: ffff8803e08fb000 RBX: 0000000000000000 RCX: 0000000000000001
[415478.496056] RDX: ffffea000f827fc0 RSI: ffffea000f820000 RDI: ffff8803e08fbf00
[415478.496056] RBP: ffff8803c9dbfbd8 R08: ffff8803e08fbf00 R09: 0000000000000000
[415478.496056] R10: 0000000000000000 R11: ffffea000f820920 R12: ffffea000f820900
[415478.496056] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000014
[415478.496056] FS:  00007f18e59b2740(0000) GS:ffff8803e0420000(0000) knlGS:0000000000000000
[415478.496056] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[415478.496056] CR2: 00007f18e59bb000 CR3: 00000001456aa000 CR4: 00000000001406e0
[415478.496056] Stack:
[415478.496056]  ffffffff81154793 ffff8803c9dbfc50 ffffffff8115620b ffff8803a9b7f400
[415478.496056]  ffff8801576ba128 ffff8803e08fbff0 0000000000000001 ffffea000f820920
[415478.496056]  ffff8803e08fbf00 0000000200000001 0000000000000000 0000000000000011
[415478.496056] Call Trace:
[415478.496056]  [<ffffffff81154793>] ? move_freepages_block+0x73/0x80

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  kernel BUG at /build/buildd/linux-3.13.0/mm/page_alloc.c:968

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress

Bug description:
  The kernel triggers a BUG when it finds it is in move_freepages() but
  the start and end pfns for the move are in different zones.

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