lkml.org 
[lkml]   [2006]   [Nov]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 1/11] Add __GFP_MOVABLE flag and update callers
On Tue, 21 Nov 2006, Mel Gorman wrote:

> On Tue, 21 Nov 2006, Christoph Lameter wrote:
>
> > Are GFP_HIGHUSER allocations always movable? It would reduce the size of
> > the patch if this would be added to GFP_HIGHUSER.
> No, they aren't. Page tables allocated with HIGHPTE are currently not movable
> for example. A number of drivers (infiniband for example) also use
> __GFP_HIGHMEM that are not movable.

HIGHPTE with __GFP_USER set? This is a page table page right?
pte_alloc_one does currently not set GFP_USER:

struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address)
{
struct page *pte;
#ifdef CONFIG_HIGHPTE
pte =
alloc_pages(GFP_KERNEL|__GFP_HIGHMEM|__GFP_REPEAT|__GFP_ZERO, 0);
#else
pte = alloc_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO, 0);
#endif
return pte;
}
How does infiniband insure that page migration does not move those pages?

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2006-11-22 03:27    [from the cache]
©2003-2011 Jasper Spaans