Messages in this thread | | | Date | Mon, 22 Feb 2021 13:46:35 +0100 | From | Michal Hocko <> | Subject | Re: [PATCH RFC] mm/madvise: introduce MADV_POPULATE to prefault/prealloc memory |
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I am slowly catching up with this thread.
On Fri 19-02-21 09:20:16, David Hildenbrand wrote: [...] > So if we have zero, we write zero. We'll COW pages, triggering a write fault > - and that's the only good thing about it. For example, similar to > MADV_POPULATE, nothing stops KSM from merging anonymous pages again. So for > anonymous memory the actual write is not helpful at all. Similarly for > hugetlbfs, the actual write is not necessary - but there is no other way to > really achieve the goal.
I really do not see why you care about KSM so much. Isn't KSM an explicit opt-in with a fine grained interface to control which memory to KSM or not? -- Michal Hocko SUSE Labs
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