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libct/cg: add swapOnlyUsage in MemoryStats

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This field reports swap-only usage. For cgroupv1, `Usage` and `Failcnt`
are set by subtracting memory usage from memory+swap usage. For cgroupv2,
`Usage`, `Limit`, and `MaxUsage` are set. This commit also export `MaxUsage`
of memory under cgroupv2 mode, using `memory.peak` introduced in kernel 5.19.

Signed-off-by: Heran Yang <heran55@126.com>
This commit is contained in:
Heran Yang
2023-09-09 15:40:39 +08:00
parent a68529ce5b
commit 104b8dc951
6 changed files with 49 additions and 8 deletions
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CHANGELOG.md
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@@ -31,6 +31,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
This aligns cgroupv2 root usage more closely with cgroupv1 reporting.
Additionally, report root swap usage as sum of swap and memory usage,
aligned with v1 and existing non-root v2 reporting. (#3933)
* Add `swapOnlyUsage` in `MemoryStats`. This field reports swap-only usage.
For cgroupv1, `Usage` and `Failcnt` are set by subtracting memory usage
from memory+swap usage. For cgroupv2, `Usage`, `Limit`, and `MaxUsage`
are set. (#4010)
### Fixed