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SubjectRe: Intel P6 vs P7 system call performance

On Sat, 21 Dec 2002, Linus Torvalds wrote:

> Saving and restoring eflags in user mode avoids all of these
> complications, and means that there are no special cases. None. Zero.
> Nada.

and i'm 100% sure the more robust eflags saving will also avoid security
holes. The amount of security-relevant complexity that comes from all the
x86 features [and their combinations] is amazing.

Ingo

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