Re: Missing cache flush.

David S. Miller
2001-06-05T03:57:13Z

Chris Wedgwood writes:
> On Mon, Jun 04, 2001 at 07:03:01PM -0700, David S. Miller wrote:
>
> The x86 doesn't have dumb caches, therefore it really doesn't
> need to flush anything. Maybe a mb(), but that is it.
>
> What if the memory is erased underneath the CPU being aware of this?
> In such a way ig generates to bus traffic...

This doesn't happen on x86. The processor snoops all transactions
done by other agents to/from main memory. The processor caches are
always up to date.

Later,
David S. Miller
davem@redhat.com