| Date | Wed, 25 Nov 2015 15:52:02 +0100 | From | Michal Hocko <> | Subject | Re: [PATCH v2 3/9] mm, page_owner: convert page_owner_inited to static key |
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On Tue 24-11-15 13:36:15, Vlastimil Babka wrote: > CONFIG_PAGE_OWNER attempts to impose negligible runtime overhead when enabled > during compilation, but not actually enabled during runtime by boot param > page_owner=on. This overhead can be further reduced using the static key > mechanism, which this patch does.
Is this really worth doing? If we do not have jump labels then the check will be atomic rather than a simple access, so it would be more costly, no? Or am I missing something? -- Michal Hocko SUSE Labs
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