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Date: Tue, 24 Jul 2007 09:45:44 +0800
From: Shaohua Li <shaohua.li@...el.com>
To: Avi Kivity <avi@...ranet.com>
Cc: kvm-devel <kvm-devel@...ts.sourceforge.net>,
lkml <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>
Subject: Re: [RFC 1/8]KVM: fix bugs in kvm sched integration patch
On Mon, 2007-07-23 at 18:46 +0800, Avi Kivity wrote:
> Shaohua Li wrote:
> > fix some bugs in kvm-sch patch.
> >
>
> There is now a 'preempt-hooks' branch on kvm.git with the
> preempt-hooks
> work. I'll continually update and rebase it against master.
>
> > 1. vmcs_readl/vmcs_writel are called with preempt enabled
> >
>
> Why is that bad?
1. raw_smp_processor_id()
2. migrate to other cpu
3. current->kvm_vcpu->cpu != the cpu id of step 1.
you will see the warning.
Thanks,
Shaohua
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