Re: [Xen-devel] BUG: unable to handle kernel paging request - balloon_init - xen-4.1.0 - 2.6.32.39

[Scott Garron <xen-devel@xxxxxxxxxxxxxxxxxx>]

On 05/04/2011 03:35 PM, Konrad Rzeszutek Wilk wrote:
> > > [..] Should give us some ideas. Not compile tested.
> .................................   ^^^^^^^^^^
     I was tracking down why it wouldn't compile, but fired off an
e-mail because I figured that if at least 2 of us were working on it,
we'd figure it out faster.

> The __func__ can be just __FUNCTION__ and the reset can be ignored (I
> think)
  It turned out that there were three underscores in front of "func"
instead of two in that one line.  I removed one of the underscores, got
it to compile, and the resulting messages at boot time are a seemingly
neverending spew of:

[    0.000000] pte_pfn_to_mfn: 0x110e01 is INVALID for 8000000110e01063

... where 0x110e01 and 8000000110e01063 are ever-increasing values.
The 8000000110e01063 number always ends in "63", though.

Here's the serial console output from the time Xen starts the Linux
kernel until the spew of repetitive messages:

[    0.000000] Initializing cgroup subsys cpuset
[    0.000000] Initializing cgroup subsys cpu
[    0.000000] Linux version 2.6.32.39 (root@hailstorm) (gcc version 
4.5.2 (Debian 4.5.2-8) ) #26 SMP Wed May 4 15:4
7:34 EDT 2011
[    0.000000] Command line: placeholder 
root=UUID=be3507b9-015f-4ac6-9b4a-914a9c774421 ro console=hvc0 earlyprintk=
xen nomodeset initcall_debug loglevel=8
[    0.000000] KERNEL supported cpus:
[    0.000000]   Intel GenuineIntel
[    0.000000]   AMD AuthenticAMD
[    0.000000]   Centaur CentaurHauls
[    0.000000] released 0 pages of unused memory
[    0.000000] BIOS-provided physical RAM map:
[    0.000000]  Xen: 0000000000000000 - 000000000009f000 (usable)
[    0.000000]  Xen: 000000000009f400 - 0000000000100000 (reserved)
[    0.000000]  Xen: 0000000000100000 - 0000000020000000 (usable)
[    0.000000]  Xen: 0000000020000000 - 00000000f9ff0000 (unusable)
[    0.000000]  Xen: 00000000f9ff0000 - 00000000f9fff000 (ACPI data)
[    0.000000]  Xen: 00000000f9fff000 - 00000000fa000000 (ACPI NVS)
[    0.000000]  Xen: 00000000febfe000 - 00000000fec01000 (reserved)
[    0.000000]  Xen: 00000000fee00000 - 00000000fee01000 (reserved)
[    0.000000]  Xen: 00000000ff780000 - 0000000100000000 (reserved)
[    0.000000]  Xen: 0000000100000000 - 00000001d9ff0000 (usable)
[    0.000000] bootconsole [xenboot0] enabled
[    0.000000] DMI 2.3 present.
[    0.000000] AMI BIOS detected: BIOS may corrupt low RAM, working 
around it.
[    0.000000] e820 update range: 0000000000000000 - 0000000000010000 
(usable) ==> (reserved)
[    0.000000] last_pfn = 0x1d9ff0 max_arch_pfn = 0x400000000
[    0.000000] x86 PAT enabled: cpu 0, old 0x50100070406, new 
0x7010600070106
[    0.000000] last_pfn = 0x20000 max_arch_pfn = 0x400000000
[    0.000000] Scanning 0 areas for low memory corruption
[    0.000000] modified physical RAM map:
[    0.000000]  modified: 0000000000000000 - 0000000000010000 (reserved)
[    0.000000]  modified: 0000000000010000 - 000000000009f000 (usable)
[    0.000000]  modified: 000000000009f400 - 0000000000100000 (reserved)
[    0.000000]  modified: 0000000000100000 - 0000000020000000 (usable)
[    0.000000]  modified: 0000000020000000 - 00000000f9ff0000 (unusable)
[    0.000000]  modified: 00000000f9ff0000 - 00000000f9fff000 (ACPI data)
[    0.000000]  modified: 00000000f9fff000 - 00000000fa000000 (ACPI NVS)
[    0.000000]  modified: 00000000febfe000 - 00000000fec01000 (reserved)
[    0.000000]  modified: 00000000fee00000 - 00000000fee01000 (reserved)
[    0.000000]  modified: 00000000ff780000 - 0000000100000000 (reserved)
[    0.000000]  modified: 0000000100000000 - 00000001d9ff0000 (usable)
[    0.000000] initial memory mapped : 0 - 0d919000
[    0.000000] init_memory_mapping: 0000000000000000-0000000020000000
[    0.000000]  0000000000 - 0020000000 page 4k
[    0.000000] kernel direct mapping tables up to 20000000 @ 100000-202000
[    0.000000] init_memory_mapping: 0000000100000000-00000001d9ff0000
[    0.000000]  0100000000 - 01d9ff0000 page 4k
[    0.000000] kernel direct mapping tables up to 1d9ff0000 @ 
da8b000-e964000
[    0.000000] pte_pfn_to_mfn: 0x100000 is INVALID for 8000000100000063
[    0.000000] pte_pfn_to_mfn: 0x100001 is INVALID for 8000000100001063
[    0.000000] pte_pfn_to_mfn: 0x100002 is INVALID for 8000000100002063
[    0.000000] pte_pfn_to_mfn: 0x100003 is INVALID for 8000000100003063


[ .. and so on - if it ever ends, I'll send you the tail of it .. ]

--
Scott Garron

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