[RFC] hugetlb reservations -- MAP_PRIVATE fixes for split vmas

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



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
--
To unsubscribe from this list: send the line "unsubscribe kernel-testers" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html

[Index of Archives]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux