Re: [PATCH] hugetlb: ensure we do not reference a surplus pageafter handing it to buddy

[Andrew Morton]

On Tue, 19 Feb 2008 12:41:51 -0600 Adam Litke <agl@xxxxxxxxxx> wrote:

> Indeed.  I'll take credit for this thinko...
> 
> On Tue, 2008-02-19 at 18:28 +0000, Andy Whitcroft wrote:
> > When we free a page via free_huge_page and we detect that we are in
> > surplus the page will be returned to the buddy.  After this we no longer
> > own the page.  However at the end free_huge_page we clear out our mapping
> > pointer from page private.  Even where the page is not a surplus we
> > free the page to the hugepage pool, drop the pool locks and then clear
> > page private.  In either case the page may have been reallocated.  BAD.
> > 
> > Make sure we clear out page private before we free the page.
> > 
> > Signed-off-by: Andy Whitcroft <apw@xxxxxxxxxxxx>
> 
> Acked-by: Adam Litke <agl@xxxxxxxxxx>

Was I right to assume that this is also needed in 2.6.24.x?
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