Re: [Xen-devel] [PATCH][XEN]xm dump command add on

[Jimi Xenidis <jimix@xxxxxxxxxxxxxx>]

can we call this "xm core" or "xm crash"?
"dump" has so many meanings, I had plans to use it for "register" and  
"memory" dump, tho I think even those should have better names.
thoughts?
-JX
On Aug 14, 2006, at 4:03 AM, Ken Hironaka wrote:

> This adds the xm dump command to xend.
> The command outputs the memory contents of the specified domU to a
> coredump file.
> This will fail if tried on dom0.
> The interface is as follows:
>
> xm dump [-L][-C] <domID> [output path]
>
> -L Live dump:By default, xm dump does an xm pause, unpause before and
> after taking the dump, respectively. This option disables the
> pause/unpause and simply takes the dump.
>
> -C crash dump: This executes an xm destroy after the dump file is
> complete.
> The output path is optional, and if it is not specified, the path will
> be
> /var/xen/dump/<domU name>.<domU ID>.core
>
> This command uses the existant dumpCore(), which has been used for
> coredump when a domU crashed.
> In this patch, the xc_domain_dumpcore_via_callback() in xc_core.c of
> libxc is also modified. Previously, the
> xc_domain_dumpcore_via_callback() did not respond to error when
> copy_from_domain_page() failed. In other words, the dump core remained
> silent even if mapping the domain memory failed and its page could not
> be copied. When this happened, erroneous data had been dumped to the
> file without the user realizing it. Now, it has been modified so  
> that if
> copy_from_domain_page fails, this fact is recorded in the logfile.
> However even in such cases, the dumping will continue as before.
>
> Signed-off-by: Ken Hironaka <hironaka.ken@xxxxxxxxxxxxxxxx>
>
> Reference
> http://lists.xensource.com/archives/html/xen-devel/2006-08/ 
> msg00181.html
> http://lists.xensource.com/archives/html/xen-devel/2006-08/ 
> msg00259.html
> http://lists.xensource.com/archives/html/xen-devel/2006-08/ 
> msg00483.html
> <xmdump_patch.diff>
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> http://lists.xensource.com/xen-devel
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