Is 64 bit Fedora OK? With which CPU?

[Philip Prindeville]

Sam Varshavchik wrote:

> Philip Prindeville writes:
>
>> The large address space is full of potential...
>>
>> I'd like to see someone do the following:
>>
>> * a 64-bit (or 48-bit) address space implementation of a GPL memory leak
>> finder like Rational's "Purify".
>
>
> valgrind now supports amd64.
>
>

Does that mean that it supports sparse allocation with "hole" 
interlacing between
individual chunks?

Or just that it was recompiled with -m64?

-Philip