[Xen-devel] Re: Why "Don't use shadow linear maps in sh_set_toplevel_shadow"?

[Tim Deegan <Tim.Deegan@xxxxxxxxxxxxx>]

At 23:13 +0800 on 17 Nov (1163805188), Li, Xin B wrote:
> It's changeset 12399, but can not understand, can you pls explain?

Because we can't use the shadow linear maps before we build them. 
The top-level shadow entry is explicitly null during that routine, and
the writeable-mappings heuristics use the shadow linear map, so it's
not safe to use them there. 

Cheers,

Tim.

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