Re: [Xen-devel] address space reorganization

[Jacob Gorm Hansen <jacobg@xxxxxxx>]

Keir Fraser wrote:

> We need generally to think about how flexible we want to be in allowing 
> migration between different machine configurations. Shoudl we require 
> identical h/w specs, or allow differences in I/O devices, CPU and/or 
> memory? We will already have to be careful about downgrading cpu specs 
> when we migrate (e.g., Linux locks onto using multimedia instructions 
> for software raid that are unavailable post-migrate).
Why not treat the functions that use special mm-instructions (like the 
software RAID code) as critical sections that cannot overlap with 
migration, and then have the guestOS re-calibrate its use of these 
features upon arrival?
[ insert standard plug of self-migration here :-) ]

Jacob

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