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SubjectRe: [PATCH 4/8] x86: Add support for rd/wr fs/gs base
> I think all of this stems from unfortunate naming.  DEBUG_STACK isn't
> one stack -- it's a debug stack *array*. The IST shift mechanism
> means that we can use different entries in that array as our stacks
> depending on how deeply nested we are.

It's not. It was always intended as one stack. It still is, for anyone
not nesting debuggers (which afaik doesn't happen in-tree, it was
only for Jan Beulich's magic debugger)

I wrote the original code, so I should know.


-- -- Speaking for myself only.

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