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| author | Linux Build Service Account <lnxbuild@quicinc.com> | 2017-07-11 00:40:08 -0700 |
|---|---|---|
| committer | Gerrit - the friendly Code Review server <code-review@localhost> | 2017-07-11 00:40:08 -0700 |
| commit | 5fd1a4847747277bca4683b0ebb25f0750d17e52 (patch) | |
| tree | 912049f83f97a8d7ec1e713779ece8bcbaa445b3 /Documentation | |
| parent | b7d16a2978a245160ac3a9cc6af396cf6f66001c (diff) | |
| parent | 2e58c8c7ee361f01d48d949da1f09a55c3d4e42d (diff) | |
Merge "mm, page_owner: convert page_owner_inited to static key"
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/vm/page_owner.txt | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/Documentation/vm/page_owner.txt b/Documentation/vm/page_owner.txt index 8f3ce9b3aa11..ffff1439076a 100644 --- a/Documentation/vm/page_owner.txt +++ b/Documentation/vm/page_owner.txt @@ -28,10 +28,11 @@ with page owner and page owner is disabled in runtime due to no enabling boot option, runtime overhead is marginal. If disabled in runtime, it doesn't require memory to store owner information, so there is no runtime memory overhead. And, page owner inserts just two unlikely branches into -the page allocator hotpath and if it returns false then allocation is -done like as the kernel without page owner. These two unlikely branches -would not affect to allocation performance. Following is the kernel's -code size change due to this facility. +the page allocator hotpath and if not enabled, then allocation is done +like as the kernel without page owner. These two unlikely branches should +not affect to allocation performance, especially if the static keys jump +label patching functionality is available. Following is the kernel's code +size change due to this facility. - Without page owner text data bss dec hex filename |