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| author | Mateusz Guzik <mjguzik@gmail.com> | 2024-06-20 19:15:27 +0200 |
|---|---|---|
| committer | John Johansen <john.johansen@canonical.com> | 2024-07-24 20:05:14 +0200 |
| commit | f4fee216df7d28b87d1c9cc60bcebfecb51c1a05 (patch) | |
| tree | 43f46dacda613f67cda982c55588f0dd3e457de6 /security/yama | |
| parent | apparmor: test: add MODULE_DESCRIPTION() (diff) | |
| download | linux-f4fee216df7d28b87d1c9cc60bcebfecb51c1a05.tar.xz linux-f4fee216df7d28b87d1c9cc60bcebfecb51c1a05.zip | |
apparmor: try to avoid refing the label in apparmor_file_open
If the label is not stale (which is the common case), the fact that the
passed file object holds a reference can be leverged to avoid the
ref/unref cycle. Doing so reduces performance impact of apparmor on
parallel open() invocations.
When benchmarking on a 24-core vm using will-it-scale's open1_process
("Separate file open"), the results are (ops/s):
before: 6092196
after: 8309726 (+36%)
Signed-off-by: Mateusz Guzik <mjguzik@gmail.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
Diffstat (limited to 'security/yama')
0 files changed, 0 insertions, 0 deletions