Messages in this thread | | | Date | Mon, 9 Oct 2006 13:45:27 +0200 | From | Nick Piggin <> | Subject | Re: [patch 3/3] mm: fault handler to replace nopage and populate |
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On Mon, Oct 09, 2006 at 09:32:59PM +1000, Benjamin Herrenschmidt wrote: > > > > You'll want to clear VM_PFNMAP after unmapping all pages from it, before > > switching to struct page backing. > > Which means having a list of all vma's ... I suppose I can look at the > truncate code to do that race free but I was hoping I could avoid it > (that's the whole point of using unmap_mapping_range() in fact).
Yeah I don't think there is any other way to do it.
> > > It also needs update_mmu_cache() I suppose. > > > > Hmm, but it might not be called from a pagefault. Can we get away > > with not calling it? Or is it required by some architectures? > > I think some architectures might be upset if it's not called...
But would any get upset if it is called from !pagefault path? - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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