Re: [PATCH -alternative] mm: hugetlbfs: Close race during teardown of hugetlbfs shared page tables V2 (resend)
From: Rik van Riel <hidden>
Date: 2012-07-31 18:23:36
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On 07/31/2012 08:46 AM, Mel Gorman wrote:
mm: hugetlbfs: Correctly detect if page tables have just been shared Each page mapped in a processes address space must be correctly accounted for in _mapcount. Normally the rules for this are straight-forward but hugetlbfs page table sharing is different. The page table pages at the PMD level are reference counted while the mapcount remains the same. If this accounting is wrong, it causes bugs like this one reported by Larry Woodman
Signed-off-by: Mel Gorman<mgorman@suse.de>
Reviewed-by: Rik van Riel <redacted> -- All rights reversed -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>