Date: Wed, 14 May 2003 11:17:48 -0700
From: Andrew Morton <akpm@digeo.com>
To: Dave McCracken <dmccr@us.ibm.com>
Cc: mika.penttila@kolumbus.fi, linux-mm@kvack.org,
       linux-kernel@vger.kernel.org
Subject: Re: Race between vmtruncate and mapped areas?
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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().
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