flush_dcache_page does too much?

[Russell King - ARM Linux]

On Mon, Jan 18, 2010 at 10:15:30PM +0800, anfei wrote:
> On Mon, Jan 18, 2010 at 02:00:05PM +0000, Russell King - ARM Linux wrote:
> > On Mon, Jan 18, 2010 at 09:54:31PM +0800, anfei wrote:
> > > Do you mean this implementation can ensure the coherence between write
> > > and shared mmapings?  But it's easy to reproduce the alias problem by
> > > this simple testcase (w/o error handler) on omap2430 with VIPT cache:
> > 
> > Your program doesn't do anything to identify any problem.  You don't
> > even say _what_ problem you see with this program.
> > 
> Sorry for that.
> 
> > If you have a specific case which fails, please show the problem, please
> > describe exactly the behaviour that you see, and what you expect to see.

Are you using a write allocate cache?