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RE: [Xen-devel] credit scheduler issues in 64bit hypervisor

To: "Keir Fraser" <Keir.Fraser@xxxxxxxxxxxx>
Subject: RE: [Xen-devel] credit scheduler issues in 64bit hypervisor
From: "Li, Xin B" <xin.b.li@xxxxxxxxx>
Date: Sun, 2 Jul 2006 23:45:39 +0800
Cc: Ian Pratt <m+Ian.Pratt@xxxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx, Steven Hand <Steven.Hand@xxxxxxxxxxxx>, "Zheng, Jeff" <jeff.zheng@xxxxxxxxx>
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Thread-index: Acad7WiSAsiCk94gS8WozTLScaglxwAAOxSw
Thread-topic: [Xen-devel] credit scheduler issues in 64bit hypervisor
>> Hmm, I still prefer allocating VMCS just before launching, can you
>> explain your concerns?
>If the VMCS allocation fails you have no path for indicating 
>failure to 
>the caller -- context switch is always expected to succeed. Critical 
>dynamic allocations should really happen on domain/vcpu creation. Also 
>the short VMCS lifetime (first launch to dom0_destroy) means that 
>getvcpucontext at other times -- on a very new HVM guest or one very 
>close to death -- probably crashes or hangs right now.

OK, that's reasonable :-), I'll send out the patch.

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