Re: [PATCH 0/3] Support for marking domains as "tainted"

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On Wed, May 04, 2011 at 12:28:45PM +0100, Daniel P. Berrange wrote:
> There are various configurations for virtual domains that we allow,
> but do not wish to actively support in production environments.
> The support situation is similar to that of binary only or non-GPL
> kernel modules, so borrow the kernel's idea of "tainting".
> 
> When an undesirable configuration is used on a running VM, set a
> suitable taint flag and log a warning. OS distro bug triagers can
> see these warnings and decide whether to support users filing bugs
> in this scenarios

  Looks fine, but post 0.9.1 obviously.
Patch 1 and 2 no problem. For patch 3 I wonder if it's a good idea to
open the logs if we don't have to report a taint violation, which I
would assume is not frequent.
In general the idea of making easier to append a log string to the domain
log file could be used in various places (though I remember arguments
that since it's given to the QEmu process libvirtd should avoid touch
it, on the other hand that's the best place to report per domain
incidents), maybe we could just have a Snprintf like function to append
to it and then only use it if we detect a tainted problem to report.

  Could be done as refinement on top of patch 3,

Daniel

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Daniel Veillard      | libxml Gnome XML XSLT toolkit  http://xmlsoft.org/
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