linux-kernel - Re: [PATCH v11 11/19] s390/mm: KVM: pv: when tearing down, try to destroy protected pages

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Message-ID: <20220608140323.0c46c0a2@li-ca45c2cc-336f-11b2-a85c-c6e71de567f1>
Date:   Wed, 8 Jun 2022 14:03:23 +0200
From:   Nico Boehr <nrb@...ux.ibm.com>
To:     Claudio Imbrenda <imbrenda@...ux.ibm.com>
Cc:     kvm@...r.kernel.org, borntraeger@...ibm.com, frankja@...ux.ibm.com,
        thuth@...hat.com, pasic@...ux.ibm.com, david@...hat.com,
        linux-s390@...r.kernel.org, linux-kernel@...r.kernel.org,
        scgl@...ux.ibm.com, mimu@...ux.ibm.com
Subject: Re: [PATCH v11 11/19] s390/mm: KVM: pv: when tearing down, try to
 destroy protected pages

On Fri,  3 Jun 2022 08:56:37 +0200
Claudio Imbrenda <imbrenda@...ux.ibm.com> wrote:

> When ptep_get_and_clear_full is called for a mm teardown, we will now
> attempt to destroy the secure pages. This will be faster than export.
> 
> In case it was not a teardown, or if for some reason the destroy page
> UVC failed, we try with an export page, like before.
> 
> Signed-off-by: Claudio Imbrenda <imbrenda@...ux.ibm.com>
> Acked-by: Janosch Frank <frankja@...ux.ibm.com>

Reviewed-by: Nico Boehr <nrb@...ux.ibm.com>