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xen-devel
RE: [Xen-devel] A question about changeset 20621:f9392f6eda79 and Disco
Originally I thought to use bitmap to present the online status, but seems I
forgot type that idea out :(
As Keir pointed out, we don't need change the interface at all.
--jyh
>-----Original Message-----
>From: Jan Beulich [mailto:JBeulich@xxxxxxxxxx]
>Sent: Wednesday, January 06, 2010 5:05 PM
>To: Jiang, Yunhong
>Cc: andre.przywara@xxxxxxx; Keir Fraser; xen-devel@xxxxxxxxxxxxxxxxxxx
>Subject: Re: [Xen-devel] A question about changeset 20621:f9392f6eda79 and
>Discontinuous online node
>
>>>> "Jiang, Yunhong" <yunhong.jiang@xxxxxxxxx> 06.01.10 09:14 >>>
>>I'm considering if we can pass this dis-continuous information to user
>>space too, but that requires change this sysctl interface. The worse
>>is, even if we can change this interface, we may run out of the 128
>>byte limitation for xen_sysctl hypercall if we change the
>>NR_CPUS == 128 in future (currently the struct xen_sysctl_physinfo
>>is 104 byte already).
>
>Could you point out where you see the risk of growing beyond 128
>bytes? No data structure in the hypercall interface depends on
>NR_CPUS afaics.
>
>Jan
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