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

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Subject: Re: KVM: Warn if mark_page_dirty() is called without an active vCPU
From: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Date: Thu, 13 Jan 2022 13:14:21 +0100
Cc: butterflyhuangxx@xxxxxxxxx, kvm@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, seanjc@xxxxxxxxxx, Cornelia Huck <cohuck@xxxxxxxxxx>, Janosch Frank <frankja@xxxxxxxxxxxxx>, David Hildenbrand <david@xxxxxxxxxx>, linux-s390 <linux-s390@xxxxxxxxxxxxxxx>, Thomas Huth <thuth@xxxxxxxxxx>, Claudio Imbrenda <imbrenda@xxxxxxxxxxxxx>
In-reply-to: <20220113120609.736701-1-borntraeger@linux.ibm.com>
References: <e8f40b8765f2feefb653d8a67e487818f66581aa.camel@infradead.org> <20220113120609.736701-1-borntraeger@linux.ibm.com>
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.4.0

On 1/13/22 13:06, Christian Borntraeger wrote:

From: Christian Borntraeger<borntraeger@xxxxxxxxxx>

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

Follow-Ups:
- Re: KVM: Warn if mark_page_dirty() is called without an active vCPU
  - From: David Woodhouse
- [PATCH] KVM: avoid warning on s390 in mark_page_dirty
  - From: Christian Borntraeger

References:
- KVM: Warn if mark_page_dirty() is called without an active vCPU
  - From: David Woodhouse
- Re: KVM: Warn if mark_page_dirty() is called without an active vCPU
  - From: Christian Borntraeger

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