diff options
| author | Vratislav Bendel <vbendel@redhat.com> | 2022-08-29 14:46:38 +0200 |
|---|---|---|
| committer | Jonathan Corbet <corbet@lwn.net> | 2023-10-10 13:35:55 -0600 |
| commit | d17ff438a0366f9dcd764ea94c54837873f30724 (patch) | |
| tree | 8dc8e49429b20903ee6f0ca4069bcd5f44c84c27 /Documentation | |
| parent | a3c12cf3a69150adb4a8fd199e4c78d4a9e65509 (diff) | |
docs: mm: fix vm overcommit documentation for OVERCOMMIT_GUESS
Commit 8c7829b04c52 "mm: fix false-positive OVERCOMMIT_GUESS failures"
changed the behavior of the default OVERCOMMIT_GUESS setting.
Reflect the change also in the Documentation, namely files:
Documentation/admin-guide/sysctl/vm.rst
Documentation/mm/overcommit-accounting.rst
Reported-by: Jozef Bacik <jobacik@redhat.com>
Signed-off-by: Vratislav Bendel <vbendel@redhat.com>
Acked-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/20220829124638.63748-1-vbendel@redhat.com
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/admin-guide/sysctl/vm.rst | 4 | ||||
| -rw-r--r-- | Documentation/mm/overcommit-accounting.rst | 3 |
2 files changed, 3 insertions, 4 deletions
diff --git a/Documentation/admin-guide/sysctl/vm.rst b/Documentation/admin-guide/sysctl/vm.rst index 45ba1f4dc004..c59889de122b 100644 --- a/Documentation/admin-guide/sysctl/vm.rst +++ b/Documentation/admin-guide/sysctl/vm.rst @@ -742,8 +742,8 @@ overcommit_memory This value contains a flag that enables memory overcommitment. -When this flag is 0, the kernel attempts to estimate the amount -of free memory left when userspace requests more memory. +When this flag is 0, the kernel compares the userspace memory request +size against total memory plus swap and rejects obvious overcommits. When this flag is 1, the kernel pretends there is always enough memory until it actually runs out. diff --git a/Documentation/mm/overcommit-accounting.rst b/Documentation/mm/overcommit-accounting.rst index a4895d6fc1c2..e2263477f6d5 100644 --- a/Documentation/mm/overcommit-accounting.rst +++ b/Documentation/mm/overcommit-accounting.rst @@ -8,8 +8,7 @@ The Linux kernel supports the following overcommit handling modes Heuristic overcommit handling. Obvious overcommits of address space are refused. Used for a typical system. It ensures a seriously wild allocation fails while allowing overcommit to - reduce swap usage. root is allowed to allocate slightly more - memory in this mode. This is the default. + reduce swap usage. This is the default. 1 Always overcommit. Appropriate for some scientific |