From: Paolo Bonzini <pbonzini@redhat.com>
To: Christian Borntraeger <borntraeger@de.ibm.com>,
linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Subject: Re: [RFC PATCH] KVM: race-free exit from KVM_RUN without POSIX signals
Date: Wed, 8 Feb 2017 15:10:24 +0100 [thread overview]
Message-ID: <8da58a9f-5de6-d2af-559d-4b04201f0d87@redhat.com> (raw)
In-Reply-To: <21c5c4e8-dd30-6f47-e169-a642e06656cc@de.ibm.com>
On 08/02/2017 14:18, Christian Borntraeger wrote:
>> VCPU thread service thread
>> --------------------------------------------------------------
>> raise signal
>> signal handler
>> set run->immediate_exit
>> KVM_RUN
>> check run->immediate_exit
> So the idea is to have both, a signal and this flag and you want userspace
> to set this flag in its signal handler?
Yes. This flag can also replace qemu_cpu_kick_self.
> So we no longer block this signal
> in QEMU then. Makes sense.
> Do you have the QEMU patch ready, to do a better review of the whole idea?
I have something that seems to work, but I've not stressed it at all and
it depends on a few cleanups to the SIGBUS handling code (which is
currently x86-specific).
Paolo
next prev parent reply other threads:[~2017-02-08 14:48 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-08 11:10 Paolo Bonzini
2017-02-08 13:18 ` Christian Borntraeger
2017-02-08 14:10 ` Paolo Bonzini [this message]
2017-02-08 13:26 ` Radim Krčmář
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