Re: smp race fix between invalidate_inode_pages* and do_no_page

[Andrew Morton <akpm@osdl.org>]

Hugh Dickins <hugh@veritas.com> wrote:
>
>  But I do not know what guarantees invalidate_inode_pages2 is supposed
>  to give.  As soon as you emerge from iipages2, its work could be undone:

yup.  It cannot become a hard guarantee unless we add some new really big
locks.

So it can be fooled by silly or poorly-designed apps.  What we're aiming
for here is predictable behaviour for sanely-implemented applications and
refusal to oops or to expose insecure data for poorly-designed ones or
exploits.
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