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mm: memcontrol: rein in the CONFIG space madness

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What CONFIG_INET and CONFIG_LEGACY_KMEM guard inside the memory
controller code is insignificant, having these conditionals is not
worth the complication and fragility that comes with them.

[[email protected]: rework mem_cgroup_css_free() statement ordering]
Signed-off-by: Johannes Weiner <[email protected]>
Cc: Michal Hocko <[email protected]>
Acked-by: Vladimir Davydov <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Johannes Weiner 2016-01-20 15:02:47 -08:00 • committed by Linus Torvalds
commit d886f4e483
4 changed files with 12 additions and 78 deletions
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21
init/Kconfig
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@ -964,20 +964,6 @@ config MEMCG_SWAP_ENABLED
For those who want to have the feature enabled by default should
select this option (if, for some reason, they need to disable it
then swapaccount=0 does the trick).
config MEMCG_LEGACY_KMEM
bool
config MEMCG_KMEM
bool "Legacy Memory Resource Controller Kernel Memory accounting"
depends on MEMCG
depends on SLUB || SLAB
select MEMCG_LEGACY_KMEM
help
The Kernel Memory extension for Memory Resource Controller can limit
the amount of memory used by kernel objects in the system. Those are
fundamentally different from the entities handled by the standard
Memory Controller, which are page-based, and can be swapped. Users of
the kmem extension can use it to guarantee that no group of processes
will ever exhaust kernel resources alone.
config BLK_CGROUP
bool "IO controller"
@ -1190,10 +1176,9 @@ config USER_NS
to provide different user info for different servers.
When user namespaces are enabled in the kernel it is
recommended that the MEMCG and MEMCG_KMEM options also be
enabled and that user-space use the memory control groups to
limit the amount of memory a memory unprivileged users can
use.
recommended that the MEMCG option also be enabled and that
user-space use the memory control groups to limit the amount
of memory a memory unprivileged users can use.
If unsure, say N.