Re: [Xen-devel] [PATCH] Scheduling groups, credit scheduler support

[Chris <hap10@xxxxxxxxxxxxxx>]

Mike,

My reading of your scheduling groups implementation is that it  
induces hierarchal relationships (master/slave) between domains.   
That is, every group has one master and the rest are slaves.   
Although that implementation has the advantage of being small, the  
fixed relationship puts implicit limits on the organization of  
domains and the operations that can be applied to them.
In addition to scheduling, I believe domain groups are applicable to  
other areas such as domain disaggregation, convenient migration,  
efficient security policy, etc..  As such, a non-hierarchical group  
mechanism is desirable.
I submitted a related domain grouping patch in the past (Feb 20,  
2007).  If anyone is interested, I'd be glad to submit a fresh cut of  
my patches against the tip as an RFC.
Cheers,
Chris

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