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docs: cgroup-v1: make swap extension subsections subsections

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Subsections text of swap extension section is marked up as bold text,
whereas making them proper subsection is more appropriate.

Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Bagas Sanjaya 2023-01-05 20:16:32 +07:00 committed by Tejun Heo
parent b9d2a17b32
commit 5fa16afc4b
1 changed files with 4 additions and 2 deletions
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6
Documentation/admin-guide/cgroup-v1/memory.rst
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@ -244,7 +244,8 @@ In this case, setting memsw.limit_in_bytes=3G will prevent bad use of swap.
By using the memsw limit, you can avoid system OOM which can be caused by swap By using the memsw limit, you can avoid system OOM which can be caused by swap
shortage. shortage.
**why 'memory+swap' rather than swap** 2.4.1 why 'memory+swap' rather than swap
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The global LRU(kswapd) can swap out arbitrary pages. Swap-out means The global LRU(kswapd) can swap out arbitrary pages. Swap-out means
to move account from memory to swap...there is no change in usage of to move account from memory to swap...there is no change in usage of
@ -252,7 +253,8 @@ memory+swap. In other words, when we want to limit the usage of swap without
affecting global LRU, memory+swap limit is better than just limiting swap from affecting global LRU, memory+swap limit is better than just limiting swap from
an OS point of view. an OS point of view.
**What happens when a cgroup hits memory.memsw.limit_in_bytes** 2.4.2. What happens when a cgroup hits memory.memsw.limit_in_bytes
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
When a cgroup hits memory.memsw.limit_in_bytes, it's useless to do swap-out When a cgroup hits memory.memsw.limit_in_bytes, it's useless to do swap-out
in this cgroup. Then, swap-out will not be done by cgroup routine and file in this cgroup. Then, swap-out will not be done by cgroup routine and file