Messages in this thread | | | From | Muchun Song <> | Date | Tue, 15 Sep 2020 23:28:01 +0800 | Subject | Re: [External] Re: [RFC PATCH 00/24] mm/hugetlb: Free some vmemmap pages of hugetlb page |
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On Tue, Sep 15, 2020 at 10:32 PM Matthew Wilcox <willy@infradead.org> wrote: > > On Tue, Sep 15, 2020 at 08:59:23PM +0800, Muchun Song wrote: > > This patch series will free some vmemmap pages(struct page structures) > > associated with each hugetlbpage when preallocated to save memory. > > It would be lovely to be able to do this. Unfortunately, it's completely > impossible right now. Consider, for example, get_user_pages() called > on the fifth page of a hugetlb page.
Can you elaborate on the problem? Thanks so much.
> > I've spent a lot of time thinking about this, and there's a lot of work > that needs to happen before we can do this, mostly in device drivers. > Do you want to help? It's a multi-year project.
Welcome, we can work together.
-- Yours, Muchun
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