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Re: [Xen-tools] Re: [Xen-devel] [PATCH] Make xend reject duplicates and
| To: | Anthony Liguori <aliguori@xxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-tools] Re: [Xen-devel] [PATCH] Make xend reject duplicates and rename zombies |
| From: | Christian Limpach <christian.limpach@xxxxxxxxx> |
| Date: | Fri, 16 Sep 2005 22:48:06 +0100 |
| Cc: | Xen Tools Developers <xen-tools@xxxxxxxxxxxxxxxxxxx>, Xen Developers <xen-devel@xxxxxxxxxxxxxxxxxxx> |
| Delivery-date: | Fri, 16 Sep 2005 21:45:42 +0000 |
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| Reply-to: | Christian.Limpach@xxxxxxxxxxxx |
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On 9/16/05, Anthony Liguori <aliguori@xxxxxxxxxx> wrote:
> >I think renaming would make sense if a domain is crashed. You might
> >want to keep the domain around to attach a debugger to it but at the
> >same time restart a fresh copy as soon as possible.
>
> As long as you can make sure to rename *after* all of the devices have
> been properly torn down.
>
> Otherwise, we need to make sure to make it well known that restarting a
> domain after a crash can result in very bad things :-)
How so? The crashed domain is certainly not going to do anything with
those devices anymore... Actually, I'm not even sure I buy the
"unsafe to reuse devices" argument if the domain is only hanging
around in an almost dead state -- it's almost dead, it's not going to
do any requests on those devices anymore...
So regarding the check for termination in check_name, if we only
switch the state to terminated once the domain is almost dead, reusing
the name should be fine...
christian
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