Messages in this thread | | | Date | Wed, 11 May 2022 03:31:00 +0000 | From | CGEL <> | Subject | Re: [PATCH] mm/memcg: support control THP behaviour in cgroup |
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On Tue, May 10, 2022 at 08:11:16PM -0700, Roman Gushchin wrote: > On Tue, May 10, 2022 at 07:47:29PM -0700, Shakeel Butt wrote: > > On Tue, May 10, 2022 at 7:19 PM CGEL <cgel.zte@gmail.com> wrote: > > > > > [...] > > > > > > > > > > > > All controls in cgroup v2 should be hierarchical. This is really > > > > > > required for a proper delegation semantic. > > > > > > > > > > > > > > > > Could we align to the semantic of /sys/fs/cgroup/memory.swappiness? > > > > > Some distributions like Ubuntu is still using cgroup v1. > > > > > > > > Other than enable flag, how would you handle the defrag flag > > > > hierarchically? It is much more complicated. > > > > > > Refer to memory.swappiness for cgroup, this new interface better be independent. > > > > Let me give my 0.02. I buy the use-case of Admin restricting THPs to > > low priority jobs but I don't think memory controller is the right > > place to enforce that policy. Michal gave one way (prctl()) to enforce > > that policy. Have you explored the BPF way to enforce this policy? > > +1 for bpf > > I think these THP hints are too implementation-dependent and unstable to become > a part of cgroup API. >
Thanks! If no other suggesting we will submit a bpf version of this patch.
> Thanks!
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