Thread (79 messages) 79 messages, 8 authors, 2025-09-15

Re: [PATCH v11 00/15] khugepaged: mTHP support

From: David Hildenbrand <hidden>
Date: 2025-09-12 15:44:04
Also in: linux-doc, linux-mm, lkml

quoted
Maybe in the Great Glorious Future (how many of those do we have?!) it would
be a good idea to take this kinds of things into account. Just because we can
map a THP, doesn't mean we should.

Shower thought: it might be in these cases especially where the FreeBSD
reservation system comes in handy - best effort allocating a THP, but not
actually mapping it as such until you really _know_ it is hot - and until
then, memory reclaim can just break your THP down if it really needs to.
This is just silly. All downsides without benefit until maybe later. And
for short-lived processes the "later" never comes.
Right, that's why I've also been arguing against that (we discussed it 
recently in the THP cabal).

-- 
Cheers

David / dhildenb
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