Re: [PATCH RFC/RFB] x86_64, i386: interrupt dispatch changes

[H. Peter Anvin]

Ingo Molnar wrote:
> yes, the accessed bit in the segment descriptor has to be updated in 
> an atomic transaction: the CPU has to do a MESI coherent 
> read+compare+write transaction, without damaging other updates to the 
> 6 bytes segment descriptor.

8 bytes, rather.
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