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mm: memcontrol: account socket memory in unified hierarchy memory controller

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Socket memory can be a significant share of overall memory consumed by
common workloads.  In order to provide reasonable resource isolation in
the unified hierarchy, this type of memory needs to be included in the
tracking/accounting of a cgroup under active memory resource control.

Overhead is only incurred when a non-root control group is created AND
the memory controller is instructed to track and account the memory
footprint of that group.  cgroup.memory=nosocket can be specified on the
boot commandline to override any runtime configuration and forcibly
exclude socket memory from active memory resource control.

Signed-off-by: Johannes Weiner <[email protected]>
Acked-by: David S. Miller <[email protected]>
Reviewed-by: Vladimir Davydov <[email protected]>
Acked-by: Michal Hocko <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Johannes Weiner 2016-01-14 15:21:29 -08:00 • committed by Linus Torvalds
commit f7e1cb6ec5
3 changed files with 110 additions and 25 deletions
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4
Documentation/kernel-parameters.txt
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@ -608,6 +608,10 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
cut the overhead, others just disable the usage. So
only cgroup_disable=memory is actually worthy}
cgroup.memory= [KNL] Pass options to the cgroup memory controller.
Format: <string>
nosocket -- Disable socket memory accounting.
checkreqprot [SELINUX] Set initial checkreqprot flag value.
Format: { "0" | "1" }
See security/selinux/Kconfig help text.