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| author | Anssi Hannula <anssi.hannula@iki.fi> | 2021-12-11 21:41:59 +0200 |
|---|---|---|
| committer | Jonathan Corbet <corbet@lwn.net> | 2021-12-16 15:53:22 -0700 |
| commit | dc10ec987903c2f6ee74a04da278a1f830fd9f3e (patch) | |
| tree | c956b548e1d0f3ea0bb164dc69c432282b6c2490 /Documentation/vm/overcommit-accounting.rst | |
| parent | 06500926052b94ccdd75bb185c35391a72cadb57 (diff) | |
| download | linux-dc10ec987903c2f6ee74a04da278a1f830fd9f3e.tar.bz2 | |
docs/vm: clarify overcommit amount sysctl behavior
Documentation/vm/overcommit-accounting.rst says that the overcommit
amount can be set via vm.overcommit_ratio and vm.overcommit_kbytes.
Add a clarification that those only take effect in overcommit handling
mode 2 ("Don't overcommit"), i.e. they do not act as an "additional"
limit that is always enforced.
Signed-off-by: Anssi Hannula <anssi.hannula@iki.fi>
Reviewed-by: David Hildenbrand <david@redhat.com>
Link: https://lore.kernel.org/r/20211211194159.3137362-1-anssi.hannula@iki.fi
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Diffstat (limited to 'Documentation/vm/overcommit-accounting.rst')
| -rw-r--r-- | Documentation/vm/overcommit-accounting.rst | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/Documentation/vm/overcommit-accounting.rst b/Documentation/vm/overcommit-accounting.rst index 0dd54bbe4afa..1addb0c374a4 100644 --- a/Documentation/vm/overcommit-accounting.rst +++ b/Documentation/vm/overcommit-accounting.rst @@ -34,7 +34,8 @@ The Linux kernel supports the following overcommit handling modes The overcommit policy is set via the sysctl ``vm.overcommit_memory``. The overcommit amount can be set via ``vm.overcommit_ratio`` (percentage) -or ``vm.overcommit_kbytes`` (absolute value). +or ``vm.overcommit_kbytes`` (absolute value). These only have an effect +when ``vm.overcommit_memory`` is set to 2. The current overcommit limit and amount committed are viewable in ``/proc/meminfo`` as CommitLimit and Committed_AS respectively. |