Messages in this thread | | | Date | Tue, 27 Oct 2015 06:49:16 -0700 (PDT) | Subject | Re: [PATCH 5/8] mm: memcontrol: account socket memory on unified hierarchy | From | David Miller <> |
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From: Michal Hocko <mhocko@kernel.org> Date: Tue, 27 Oct 2015 13:26:47 +0100
> On Mon 26-10-15 12:56:19, Johannes Weiner wrote: > [...] >> Or any other combination of pick-and-choose consumers. But >> honestly, nowadays all our paths are lockless, and the counting is an >> atomic-add-return with a per-cpu batch cache. > > You are still hooking into hot paths and there are users who want to > squeeze every single cycle from the HW.
Yeah, you're basically probably undoing a half year of work by another developer who was able to remove an atomic from these paths.
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