linux-kernel - Re: KVM: Warn if mark_page_dirty() is called without an active vCPU

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Message-ID: <e9e5521d-21e5-8f6f-902c-17b0516b9839@redhat.com>
Date:   Thu, 13 Jan 2022 13:14:21 +0100
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Christian Borntraeger <borntraeger@...ux.ibm.com>,
        dwmw2@...radead.org
Cc:     butterflyhuangxx@...il.com, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org, seanjc@...gle.com,
        Cornelia Huck <cohuck@...hat.com>,
        Janosch Frank <frankja@...ux.ibm.com>,
        David Hildenbrand <david@...hat.com>,
        linux-s390 <linux-s390@...r.kernel.org>,
        Thomas Huth <thuth@...hat.com>,
        Claudio Imbrenda <imbrenda@...ux.ibm.com>
Subject: Re: KVM: Warn if mark_page_dirty() is called without an active vCPU

On 1/13/22 13:06, Christian Borntraeger wrote:
> From: Christian Borntraeger<borntraeger@...ibm.com>
> 
> Quick heads-up.
> The new warnon triggers on s390. Here we write to the guest from an
> irqfd worker. Since we do not use dirty_ring yet this might be an over-indication.
> Still have to look into that.

Yes, it's okay to add an #ifdef around the warning.

Paolo