[Crash-utility] crash version 4.0-3.15 is available

[Dave Anderson]

Itsuro ODA wrote:

> Hi Dave,
>
> "crash xen-syms vmcore" works fine. Thank you !
>
> BTW,
> I think xendumps of fully-virtualized x86/x86_64 (also ia64) kernel
> have a magic number XC_CORE_MAGIC_HVM(0xF00FEBEE) which is defferent
> from para-virtualized. Please check.
>
> I tried a xendump of fully-virtualized ia64 kernel
> with change magic number check as follows.
> ---
> xendump.h
> +#define XC_CORE_MAGIC_HVM  0xF00FEBEE
>
> xendump.c
> -        if (xcp->xch_magic != XC_CORE_MAGIC)
> +        if (xcp->xch_magic != XC_CORE_MAGIC && xcp->xch_magic != XC_CORE_MAGIC_HVM)
> ---
> It works well execpt bt problem same as para-virtualized one.
>
> Thanks.
> --
> Itsuro ODA <oda at valinux.co.jp>

Hi Oda-san,

Ah, OK -- we (Red Hat) are still using an older version of the
xenctrl library from (3.0.3), and it uses the old XC_CORE_MAGIC.

So I didn't see any difference between para- and fully-virtualized
magic numbers; I would guess that the difference is a change in
the library as opposed to para- vs fully-virtualized xendumps?

Here's my fully-virtualized x86_64 dump header:

crash> help -n
...
      xc_core:
                   header:
                xch_magic: f00febed (XC_CORE_MAGIC)
             xch_nr_vcpus: 1
             xch_nr_pages: 68762 (0x10c9a)
          xch_ctxt_offset: 24 (0x18)
         xch_index_offset: 5192 (0x1448)
         xch_pages_offset: 557056 (0x88000)
               p2m_frames: 0
     p2m_frame_index_list:
crash>

My FV x86 from an x86 host:

crash> help -n
...
      xc_core:
                   header:
                xch_magic: f00febed (XC_CORE_MAGIC)
             xch_nr_vcpus: 1
             xch_nr_pages: 131372 (0x2012c)
          xch_ctxt_offset: 24 (0x18)
         xch_index_offset: 2824 (0xb08)
         xch_pages_offset: 528384 (0x81000)
               p2m_frames: 0
     p2m_frame_index_list:
crash>

and my FV x86 from an x86_64 host:

crash> help -n
...
     xc_core:
                   header:
                xch_magic: f00febed (XC_CORE_MAGIC)
             xch_nr_vcpus: 1
             xch_nr_pages: 131372 (0x2012c)
          xch_ctxt_offset: 24 (0x18)
         xch_index_offset: 5192 (0x1448)
         xch_pages_offset: 1056768 (0x102000)
               p2m_frames: 0
     p2m_frame_index_list:
crash>

Anyway, I'm happy that everything still works with the new
magic number -- and whatever else might have changed with it.

Also, I appreciate your verification that crash works with
ia64 fully-virtualized xendumps (with your magic number fix).

I'll update the crash package to support the new magic value.

Thanks again,
  Dave


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://listman.redhat.com/archives/crash-utility/attachments/20061221/a69da541/attachment.htm>