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Subject: Re: [External] Re: [PATCH v15 4/8] mm: hugetlb: alloc the vmemmap
 pages associated with each HugeTLB page
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From:   David Hildenbrand <david@redhat.com>
Organization: Red Hat GmbH
Message-ID: <83ba1af6-7c11-3da7-eadb-020ca591bb56@redhat.com>
Date:   Tue, 16 Feb 2021 09:20:32 +0100
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>> If current
>> node has no memory and other nodes have enough memory.
>> We can fail to allocate vmemmap pages. But actually it is
>> suitable to allocate vmemmap pages from other nodes.
>> Right?
> 
> Falling back to a different node would be very suboptimal because then
> you would have vmemmap back by remote pages. We do not want that.

... and we even warn when this happens right now:

mm/sparse-vmemmap.c:vmemmap_verify()

-- 
Thanks,

David / dhildenb