Re: [PATCH] #3: Fix xm_internal / remote interaction

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On Tue, Jul 03, 2007 at 04:14:30PM +0100, Richard W.M. Jones wrote:
> I'm not quite sure what the problem is (although the problem is in
> xm_internal), but when you use xm_internal over remote, it sometimes
> doesn't initialize its internal cache correctly, so it thinks that
> there are no inactive domains.
> 
> The fix is a one-liner which I hit upon by accident -- I don't really
> understand why it works:

Very peculiar - the  nconnections stuff is incremented / decremented
by the xenXMOpen & xenXMClose methods. So the change you show below
should be identical to previous behaviour. Is something calling the
xenXMClose method too many times maybe ? I guess some judicious use
of syslog would show it up

> 
> @@ -489,7 +487,7 @@
>    xenXMOpen (virConnectPtr conn ATTRIBUTE_UNUSED,
>               const char *name ATTRIBUTE_UNUSED, int flags 
> ATTRIBUTE_UNUSED)
>    {
> -    if (nconnections == 0) {
> +    if (configCache == NULL) {
>            configCache = virHashCreate(50);
>            if (!configCache)
>                return (-1);
> 
> But the attached patch also adds proper error messages to
> xenXMConfigCacheRefresh too.

Dan.
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