Missing cache flush.

[David S. Miller]

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 at redhat.com