Re: [PATCH] thp: tail page refcounting fix #5

[Andi Kleen]

On Thu, Sep 01, 2011 at 04:28:08PM -0700, Andrew Morton wrote:
> On Thu, 1 Sep 2011 17:24:17 +0200
> Andrea Arcangeli <aarcange@xxxxxxxxxx> wrote:
> 
> > Ideally direct-io should stop calling get_page() on pages
> > returned by get_user_pages().
> 
> Yeah.  get_user_pages() is sufficient.  Ideally we should be able to
> undo the get_user_pages() get_page() from within the IO completion
> interrupt and we're done.
> 
> Cc Andi, who is our resident dio tweaker ;)
> 

Noted, I'll put it on my list.

Should not be too difficult from a quick look, just the convoluted
nature of direct-io.c requires a lot of double checking.

-Andi

-- 
ak@xxxxxxxxxxxxxxx -- Speaking for myself only.
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