Messages in this thread | | | From | Michael Ellerman <> | Subject | Re: [kernel,v2] powerpc/iommu: Do not call PageTransHuge() on tail pages | Date | Thu, 20 Apr 2017 08:04:19 +1000 (AEST) |
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On Tue, 2017-04-11 at 07:54:57 UTC, Alexey Kardashevskiy wrote: > The CMA pages migration code does not support compound pages at > the moment so it performs few tests before proceeding to actual page > migration. > > One of the tests - PageTransHuge() - has VM_BUG_ON_PAGE(PageTail()) as > it is designed to be called on head pages only. Since we also test for > PageCompound(), and it contains PageTail() and PageHead(), we can > simplify the check by leaving just PageCompound() and therefore avoid > possible VM_BUG_ON_PAGE. > > Fixes: 2e5bbb5461f1 ("KVM: PPC: Book3S HV: Migrate pinned pages out of CMA") > Cc: stable@vger.kernel.org # v4.9+ > Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> > Acked-by: Balbir Singh <bsingharora@gmail.com>
Applied to powerpc next, thanks.
https://git.kernel.org/powerpc/c/e889e96e98e8da97bd39e46b725361
cheers
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