Re: Race between vmtruncate and mapped areas?

Andrew Morton
2003-05-14T18:17:48Z

Dave McCracken <dmccr@us.ibm.com> wrote:
>
> > It would be nice to make them go away - they cause problems.
>
> Definitely. We almost have the pieces necessary to detect it and/or
> prevent it, but the info isn't in quite the right layer at the right time.
> If it weren't for the lock order problem with mmap_sem we could have nailed
> it that way. Sigh.

I think it might be sufficient to re-check the page against i_size
after IO completion in filemap_nopage().