Re: [Qemu-devel] [Question] dump memory when host pci device is used by guest

[Richard W.M. Jones]

On Tue, Oct 18, 2011 at 12:47:23PM +0200, Jan Kiszka wrote:
> On 2011-10-18 12:41, Paolo Bonzini wrote:
> > On 10/18/2011 10:39 AM, Jan Kiszka wrote:
> >>>>
> >>>>  Yeah, I see. Could also be solved via gdb scripts, but crash is already
> >>>>  there.
> >> [ BTW, crash is for the dead. But having those features in form of gdb
> >> scripts would also allow live system analysis. Looks like it's worth
> >> obsoleting crash on the long run. ]
> > 
> > Crash can also do live system analysis. :)
> 
> Does it work via remote interface? And it's still the wrong way around:
> You have to append "gdb" to the majority of command when doing debugging
> instead of issuing additional analysis commands from the gdb shell.
> That's understandable given the limited scripting power of old gdbs. But
> that's now history thanks to its python interface.

Before this conversation heads any further into the realm of
absurdity, let's get back to the key requirements for production
systems:

(A) No development tools can be installed.

(B) The core file must be removed from the production system quickly
and analyzed by on another machine (indeed, often by experts from
another company entirely).

Anything that involves live debugging using GDB is simply not
acceptable for production systems, whether you think that's right or
not.

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
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