Re: Intel P6 vs P7 system call performance

[H. Peter Anvin]

Linus Torvalds wrote:
> On Tue, 17 Dec 2002, Linus Torvalds wrote:
> 
>>How about this diff? It does both the 6-parameter thing _and_ the
>>AT_SYSINFO addition.
> 
> 
> The 6-parameter thing is broken. It's clever, but playing games with %ebp
> is not going to work with restarting of the system call - we need to
> restart with the proper %ebp.
> 

This confuses me -- there seems to be no reason this shouldn't work as 
long as %esp == %ebp on sysexit.  The SYSEXIT-trashed GPRs seem like a 
bigger problem.

	-hpa