| From | "Aneesh Kumar K.V" <> | Subject | Re: [PATCH 03/36] mmu_notifier: pass page pointer to mmu_notifier_invalidate_page() | Date | Wed, 27 May 2015 10:47:44 +0530 |
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j.glisse@gmail.com writes:
> From: Jérôme Glisse <jglisse@redhat.com> > > Listener of mm event might not have easy way to get the struct page > behind and address invalidated with mmu_notifier_invalidate_page() > function as this happens after the cpu page table have been clear/ > updated. This happens for instance if the listener is storing a dma > mapping inside its secondary page table. To avoid complex reverse > dma mapping lookup just pass along a pointer to the page being > invalidated.
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> diff --git a/include/linux/mmu_notifier.h b/include/linux/mmu_notifier.h > index ada3ed1..283ad26 100644 > --- a/include/linux/mmu_notifier.h > +++ b/include/linux/mmu_notifier.h > @@ -172,6 +172,7 @@ struct mmu_notifier_ops { > void (*invalidate_page)(struct mmu_notifier *mn, > struct mm_struct *mm, > unsigned long address, > + struct page *page, > enum mmu_event event); >
How do we handle this w.r.t invalidate_range ?
-aneesh
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