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Re: [Xen-devel] [PATCH 1/2] balloon driver: relax BUG_ON() in increasee_

To: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Subject: Re: [Xen-devel] [PATCH 1/2] balloon driver: relax BUG_ON() in increasee_reservation()
From: Isaku Yamahata <yamahata@xxxxxxxxxxxxx>
Date: Fri, 28 Apr 2006 16:23:32 +0900
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On Fri, Apr 28, 2006 at 07:59:04AM +0100, Keir Fraser wrote:

> x86 phys_to_machine_ampping_valid() includes a check of the  
> autotranslate feature flag. It always returns 1 if that flag is set.

Yes. So when autotranslate feature flag is set,
BUG_ON(phys_to_machine_mapping_valid(pfn)) becomes BUG_ON(1)
which results in kernel panic.
This means that the balloon driver can't be used with autotranslate
feature flag set.
Is this really your intention?


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