Re: [qemu-s390x] [PATCH 1/1] s390/kvm: implement clearing part of IPL clear

[Christian Borntraeger]

On 03/05/2018 01:54 PM, Cornelia Huck wrote:
> On Wed, 28 Feb 2018 19:53:20 +0000
> Christian Borntraeger <address@hidden> wrote:
> 
>> When a guests reboots with diagnose 308 subcode 3 it requests the memory
>> to be cleared. We did not do it so far. This does not only violate the
>> architecture, it also misses the chance to free up that memory on
>> reboot, which would help on host memory over commitment.  By using
>> ram_block_discard_range we can cover both cases.
>>
>> Signed-off-by: Christian Borntraeger <address@hidden>
>> ---
>>  target/s390x/kvm.c | 19 +++++++++++++++++++
>>  1 file changed, 19 insertions(+)
> 
> So, this needs more thought (and additional kernel changes)? (Trying to
> pick up patches that make sense for 2.12.)

Yes, lets defer this.