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Subject: Re: [PATCH v1 0/9] KVM selftests for s390x
To:     Christian Borntraeger <borntraeger@de.ibm.com>,
        Thomas Huth <thuth@redhat.com>,
        Janosch Frank <frankja@linux.ibm.com>, kvm@vger.kernel.org
Cc:     Paolo Bonzini <pbonzini@redhat.com>,
        =?UTF-8?B?UmFkaW0gS3LEjW3DocWZ?= <rkrcmar@redhat.com>,
        Shuah Khan <shuah@kernel.org>,
        Cornelia Huck <cohuck@redhat.com>,
        Andrew Jones <drjones@redhat.com>,
        linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org,
        linux-s390@vger.kernel.org
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From:   David Hildenbrand <david@redhat.com>
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Organization: Red Hat GmbH
Message-ID: <e2f1f36b-51b6-30f3-cee5-950b72b6fa67@redhat.com>
Date:   Fri, 24 May 2019 14:36:24 +0200
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On 24.05.19 14:29, Christian Borntraeger wrote:
> 
> 
> On 24.05.19 14:17, Christian Borntraeger wrote:
>>
>>
>> On 24.05.19 13:11, Christian Borntraeger wrote:
>>> I do get
>>>
>>> [10400.440298] kvm-s390: failed to commit memory region
>>> [10400.508723] kvm-s390: failed to commit memory region
>>>
>>> when running the tests. Will have a look.
>>
>> It comes from kvm_vm_free. This calls KVM_SET_USER_MEMORY_REGION with size 0,
>> which the s390 code does not like.
>>
> 
> The doc says about  KVM_SET_USER_MEMORY_REGION:
> 
> This ioctl allows the user to create or modify a guest physical memory
> slot.  When changing an existing slot, it may be moved in the guest
> physical memory space, or its flags may be modified.  --> It may not be
> resized. <----

Size 0 is deleting, not resizing AFAIK.


-- 

Thanks,

David / dhildenb