On Sat, 1 Dec 2001, Alan Cox wrote:
> > The point is why store kernel pointers in global registers when You can
> > achieve the same functionality, with a smaller patch, that does not need
> > to be recoded for each CPU, without using global registers.
>
> Because it is much much much faster
We'll see how much faster is the global register allocation against code
like :
movl %esp, %eax
andl $-8192, %eax
movl (%eax), %eax
Because you can justify a global register allocation only if this "much
much faster" translates to a number that has sense.
- Davide
-
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This archive was generated by hypermail 2b29 : Fri Dec 07 2001 - 21:00:17 EST