Re: fix iounmap and a pageattr memleak (x86 and x86-64)

[Dave Hansen]

Andrew Morton wrote:
> Dave Hansen <haveblue@xxxxxxxxxx> wrote:
>
> > Andrea Arcangeli wrote:
> >
> > > Still I recommend investigating _why_ debug_pagealloc is violating the
> > > API. It might not be necessary to wait for the pageattr universal
> > > feature to make DEBUG_PAGEALLOC work safe.
> >
> > OK, good to know.  But, for now, can we pull this out of -mm?  Or, at 
> > least that BUG_ON()?  DEBUG_PAGEALLOC is an awfully powerful debugging 
> > tool to just be removed like this.
>
> If we make it a WARN_ON, will that cause a complete storm of output?

Yeah, just tried it.  I hit a couple hundred of them before I got to init.
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