Re: [patch] 'virtual => physical page mapping cache', vcache-2.5.38-B8

[Chris Wedgwood]

On Fri, Sep 27, 2002 at 07:44:08PM +0200, Ingo Molnar wrote:

> and i'm not quite sure how other users of get_user_pages()
> (direct-IO) handle these kinds of COW races.

O_DIRECT is allow to break if someone does something silly :)  I think
XFS tried hard to make sure things are consistent, but e2fs (at least
at one point) allowed you to read data from a file O_DIRECT which was
very different to what someone else read via the page-cache.

  --cw