From mboxrd@z Thu Jan  1 00:00:00 1970
From: Paolo Bonzini <pbonzini@redhat.com>
Subject: Re: [PATCH/RFC] KVM: track pid for VCPU only on KVM_RUN ioctl
Date: Tue, 19 Aug 2014 11:27:26 +0200
Message-ID: <53F3187E.6080706@redhat.com>
References: <1407249854-2953-1-git-send-email-borntraeger@de.ibm.com> <53E38193.8060206@redhat.com> <53F30CF3.5030606@de.ibm.com>
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Cc: KVM <kvm@vger.kernel.org>, Gleb Natapov <gleb@kernel.org>,
	Rik van Riel <riel@redhat.com>,
	Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>,
	Michael Mueller <mimu@linux.vnet.ibm.com>
To: Christian Borntraeger <borntraeger@de.ibm.com>
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Il 19/08/2014 10:38, Christian Borntraeger ha scritto:
>> > The patch may be okay, but I'm worried that it might be hiding a bug in
>> > QEMU.
> On s390 we call "KVM_S390_INITIAL_RESET" from several reset functions, e.g. during 
> CPU creation. This is the first hickup and the pid now points to the main thread.

Any reason to have a special ioctl instead of SET_REGS/SET_ONE_REG/...
(via kvm_cpu_synchronize_state, which does the ioctls in the VCPU thread)?

Paolo