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makedumpfile-1.1.5: Xen support

DISCUSSION Dave Anderson 2 participants 5 messages Jul 27, 2007 – Aug 10, 2007

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#0 lore raw
Quoted 8 lines

Changelog:
o Add a new feature that extracting the part of xen hypervisor and domain-0 from /proc/vmcore. In most cases under xen environment, it is enough to analyze a cause of system crash.
The patch was provided by Itsuro Oda.
Usage:

    # makedumpfile -E --xen-syms xen-syms /proc/vmcore dumpfile

Can you verify that the dumpfile created above is usable as both a hypervisor dumpfile as well as a dom0 vmlinux dumpfile? In other words, can both of the following sessions be accomplished with the resultant dumpfile?

  # crash xen-syms dumpfile

and:

  # crash vmlinux dumpfile

Thanks,
Dave

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#1 lore raw

Hi Dave,

Quoted 13 lines
Quoted 7 lines

Changelog:
o Add a new feature that extracting the part of xen hypervisor and domain-0 from /proc/vmcore. In most cases under xen environment, it is enough to analyze a cause of system crash.
The patch was provided by Itsuro Oda.
Usage:

    # makedumpfile -E --xen-syms xen-syms /proc/vmcore dumpfile

Can you verify that the dumpfile created above is usable as both a hypervisor dumpfile as well as a dom0 vmlinux dumpfile? In other words, can both of the following sessions be accomplished with the resultant dumpfile?

Quoted 6 lines
  # crash xen-syms dumpfile

and:

  # crash vmlinux dumpfile

Yes.

Thanks.

Signature · 7 lines
Itsuro ODA <[email protected]>


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#2 lore raw
Quoted 20 lines · Itsuro ODA

Hi Dave,

Quoted 17 lines
Quoted 7 lines

Changelog:
o Add a new feature that extracting the part of xen hypervisor and domain-0 from /proc/vmcore. In most cases under xen environment, it is enough to analyze a cause of system crash.
The patch was provided by Itsuro Oda.
Usage:

   # makedumpfile -E --xen-syms xen-syms /proc/vmcore dumpfile

Can you verify that the dumpfile created above is usable as both a hypervisor dumpfile as well as a dom0 vmlinux dumpfile? In other words, can both of the following sessions be accomplished with the resultant dumpfile?

 # crash xen-syms dumpfile

and:

Quoted 7 lines
Quoted 2 lines
 # crash vmlinux dumpfile

Yes.

Thanks.

Great -- thanks.

Is the "-d" dump_level option completely ignored, or can it (without vmlinux awareness) recognize and skip zero-filled pages?

Dave

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#3 lore raw

Hi,

Quoted 3 lines

Is the "-d" dump_level option completely ignored, or can it (without vmlinux awareness) recognize and skip zero-filled pages?

Yes, "-d" is ignored.

Hmm, adding to skip zero-filled pages is easy but I wonder how effective it is ...

Thanks.

Signature · 7 lines
Itsuro ODA <[email protected]>


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#4 lore raw

Hi,

Quoted 2 lines

Hmm, adding to skip zero-filled pages is easy but I wonder how effective it is ...

I found it is sometimes effective.

The attached patch enables the "-d" option with --xen-syms. Note that only the level 1 (skip zero-filled pages) is supported.

ex. # makedumpfile -E -d 1 --xen-syms xen-syms.debug vmcore output

Thanks.
Itsuro Oda

Quoted 20 lines · On Tue, 31 Jul 2007 07:19:48 +0900 Itsuro ODA <[email protected]> wrote:

Hi,

Quoted 3 lines

Is the "-d" dump_level option completely ignored, or can it (without vmlinux awareness) recognize and skip zero-filled pages?

Yes, "-d" is ignored.

Hmm, adding to skip zero-filled pages is easy but I wonder how effective it is ...

Thanks.

Signature · 7 lines
Itsuro ODA <[email protected]>


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Signature · 1 line
Itsuro ODA <[email protected]>

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