Messages in this thread | | | From | Muchun Song <> | Date | Thu, 29 Oct 2020 21:34:22 +0800 | Subject | Re: [External] Re: [PATCH v2 03/19] mm/hugetlb: Introduce a new config HUGETLB_PAGE_FREE_VMEMMAP |
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On Thu, Oct 29, 2020 at 6:29 PM Oscar Salvador <osalvador@suse.de> wrote: > > On Mon, Oct 26, 2020 at 10:50:58PM +0800, Muchun Song wrote: > > The purpose of introducing HUGETLB_PAGE_FREE_VMEMMAP is to configure > > whether to enable the feature of freeing unused vmemmap associated > > with HugeTLB pages. Now only support x86. > > Why this needs to be a config thing? > If this space-memory-optimization does not come with a trade-off, > why does the user have to set this instead of coming by default?
Now we only support x86_64. If we want to support other archs. We need some arch special code to support this feature. In the future, if this patch series is merged to mainline, I will implement this optimization for other archs. At that time we can remove the HUGETLB_PAGE_FREE_VMEMMAP.
Thanks.
> > > -- > Oscar Salvador > SUSE L3
-- Yours, Muchun
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