| | From | Andy Whitcroft <> | | Subject | [RFC] hugetlb reservations -- MAP_PRIVATE fixes for split vmas | | Date | Fri, 20 Jun 2008 20:17:52 +0100 | |
As reported by Adam Litke and Jon Tollefson one of the libhugetlbfs
regression tests triggers a negative overall reservation count. When
this occurs where there is no dynamic pool enabled tests will fail.
Following this email are two patches to fix this issue:
hugetlb reservations: move region tracking earlier -- simply moves the
region tracking code earlier so we do not have to supply prototypes, and
hugetlb reservations: fix hugetlb MAP_PRIVATE reservations across vma
splits -- which moves us to tracking the consumed reservation so that
we can correctly calculate the remaining reservations at vma close time.
This stack is against the top of v2.6.25-rc6-mm3, should this solution
prove acceptable it would probabally need porting below Nicks multiple
hugepage size patches and those updated; if so I would be happy to do
that too.
Jon could you have a test on this and see if it works out for you.
-apw
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