Re: [Xen-devel] [PATCH 06/18] xenpaging: allow only one xenpaging binary per guest

[Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>]

Olaf Hering writes ("[Xen-devel] [PATCH 06/18] xenpaging: allow only one 
xenpaging binary per guest"):
> -        ERROR("Error initialising shared page");
> +        switch ( errno ) {
> +            case EBUSY:
> +                ERROR("xenpaging is (or was) active on this domain");
> +                break;
> +            case ENODEV:
> +                ERROR("EPT not supported for this guest");
> +                break;
> +            default:
> +                ERROR("Error initialising shared page");
> +                break;

Surely this should print the actual errno value.

> +            /* Only one xenpaging at a time. If xenpaging crashed,
> +             * the cache is in an undefined state and so is the guest
> +             */
> +            rc = -EBUSY;
> +            if ( d->mem_event.enabled )
> +                break;

Is there any way to recover from this or is the guest just hosed ?

Ian.

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