Re: Race between vmtruncate and mapped areas?

[Andrew Morton]

Andrea Arcangeli <[e-mail]> wrote:
>
> > > -	if (page->buffers)
>  > > -		goto preserve;
>  > > +	BUG_ON(page->buffers);
>  > 
>  > I wonder if there is nothing else that can leave behind
>  > buffers in this way.
> 
>  that's why I left the BUG_ON, if there's anything else I want to know,
>  there shouldn't be anything else as the comment also suggest. I recall
>  when we discussed this single check with Andrew and that was the only
>  reason we left it AFIK.

yes, the test should no longer be needed.