Re: [Xen-devel] Re: kernel BUG at mm/swapfile.c:2527! [was 3.0.0 Xen pv guest - BUG: Unable to handle]

["Christopher S. Aker" <caker@theshore.net>]

Another report, different user, and slightly different:

BUG: unable to handle kernel paging request at f573fc8c
IP: [<c01abc54>] swap_count_continued+0x104/0x180
*pdpt = 000000002a3b9027 *pde = 0000000001bed067 *pte = 0000000000000000
Oops: 0000 [#1] SMP
Modules linked in:

Pid: 1638, comm: apache2 Not tainted 3.0.4-linode37 #1
EIP: 0061:[<c01abc54>] EFLAGS: 00210246 CPU: 3
EIP is at swap_count_continued+0x104/0x180
EAX: f573fc8c EBX: ed1d4840 ECX: 00000000 EDX: 000000be
ESI: ed1d4a20 EDI: 000000be EBP: 00000c8c ESP: e9e5fdb0
  DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0069
Process apache2 (pid: 1638, ti=e9e5e000 task=ead37410 task.ti=e9e5e000)
Stack:
  ea746dc0 0000fc8c 000000be ffffffea c01ac222 358a1067 c01040f7 0002a75e
  405d54c0 0000fc8c ea75e5e8 001f9180 b74bd000 c01ac2e4 00000000 c01a0a6b
  a9fdf045 80000002 00000000 00000000 0000fc8c 00000000 dc5d55e8 08100073
Call Trace:
  [<c01ac222>] ? __swap_duplicate+0xc2/0x160
  [<c01040f7>] ? pte_mfn_to_pfn+0x87/0xe0
  [<c01ac2e4>] ? swap_duplicate+0x14/0x40
  [<c01a0a6b>] ? copy_pte_range+0x45b/0x500
  [<c01a0ca5>] ? copy_page_range+0x195/0x200
  [<c01328c6>] ? dup_mmap+0x1c6/0x2c0
  [<c0132cf8>] ? dup_mm+0xa8/0x130
  [<c013376a>] ? copy_process+0x98a/0xb30
  [<c013395f>] ? do_fork+0x4f/0x280
  [<c01573b3>] ? getnstimeofday+0x43/0x100
  [<c010f770>] ? sys_clone+0x30/0x40
  [<c06c048d>] ? ptregs_clone+0x15/0x48
  [<c06bfb71>] ? syscall_call+0x7/0xb
  [<c06b0000>] ? sctp_err_lookup+0xb0/0x110
Code: de 75 dc b8 01 00 00 00 5b 5e 5f 5d c3 66 90 e8 e3 79 f7 ff 8b 5b 
18 83 eb 18 39 de 0f 84 7f 00 00 00 89 d8 e8 5e 7c f7 ff 01 e8 <0f> b6 
10 80 fa ff 74 dc 80 fa 7f 74 28 83 c2 01 88 10 eb 0c 89
EIP: [<c01abc54>] swap_count_continued+0x104/0x180 SS:ESP 0069:e9e5fdb0
CR2: 00000000f573fc8c
---[ end trace 18843f6443e730a1 ]---