Re: [PATCH 4/7] x86: Add support for rd/wr fs/gs base

[Andi Kleen]

> Allowing userspace to prevent itself from being rescheduled by loading
> something strange into gsbase seems unfortunate.

The timer tick will eventually catch it, so any delay is tightly
bounded.

Also still gets rescheduled most of the time, just not when a paranoid 
exception handler is running.

-Andi
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