Re: Intel P6 vs P7 system call performance

From: Ingo Molnar (mingo@elte.hu)
Date: Sun Dec 22 2002 - 05:13:38 EST


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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