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

From: Paolo Bonzini
Subject: Re: [qemu-s390x] [PATCH 1/1] s390/kvm: implement clearing part of IPL clear
Date: Thu, 1 Mar 2018 09:44:25 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.6.0

On 01/03/2018 04:58, Thomas Huth 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.
> Sounds like a good idea. I wonder whether that release_all_ram()
> function should maybe rather reside in exec.c, so that other machines
> that want to clear all RAM at reset time can use it, too?

Either way is fine for me.  With s/rams/ram/ the s390-only patch is ok.


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