libct/cg/fs: export swap only usage in cgroups v1

Signed-off-by: Heran Yang <[email protected]>
opencontainers · Sep 28, 2023 · 80a6c8f · 80a6c8f
1 parent e6f154b
commit 80a6c8f
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Showing 2 changed files with 11 additions and 6 deletions.
diff --git a/libcontainer/cgroups/fs/memory.go b/libcontainer/cgroups/fs/memory.go
@@ -170,6 +170,10 @@ func (s *MemoryGroup) GetStats(path string, stats *cgroups.Stats) error {
 		return err
 	}
 	stats.MemoryStats.SwapUsage = swapUsage
+	stats.MemoryStats.SwapOnlyUsage = cgroups.MemoryData{
+		Usage: swapUsage.Usage - memoryUsage.Usage,
+		Limit: swapUsage.Limit - memoryUsage.Limit,
+	}
 	kernelUsage, err := getMemoryData(path, "kmem")
 	if err != nil {
 		return err

diff --git a/libcontainer/cgroups/fs/memory_test.go b/libcontainer/cgroups/fs/memory_test.go
@@ -249,12 +249,13 @@ func TestMemoryStats(t *testing.T) {
 		t.Fatal(err)
 	}
 	expectedStats := cgroups.MemoryStats{
-		Cache:        512,
-		Usage:        cgroups.MemoryData{Usage: 2048, MaxUsage: 4096, Failcnt: 100, Limit: 8192},
-		SwapUsage:    cgroups.MemoryData{Usage: 2048, MaxUsage: 4096, Failcnt: 100, Limit: 8192},
-		KernelUsage:  cgroups.MemoryData{Usage: 2048, MaxUsage: 4096, Failcnt: 100, Limit: 8192},
-		Stats:        map[string]uint64{"cache": 512, "rss": 1024},
-		UseHierarchy: true,
+		Cache:         512,
+		Usage:         cgroups.MemoryData{Usage: 2048, MaxUsage: 4096, Failcnt: 100, Limit: 8192},
+		SwapUsage:     cgroups.MemoryData{Usage: 2048, MaxUsage: 4096, Failcnt: 100, Limit: 8192},
+		SwapOnlyUsage: cgroups.MemoryData{Usage: 0, MaxUsage: 0, Failcnt: 0, Limit: 0},
+		KernelUsage:   cgroups.MemoryData{Usage: 2048, MaxUsage: 4096, Failcnt: 100, Limit: 8192},
+		Stats:         map[string]uint64{"cache": 512, "rss": 1024},
+		UseHierarchy:  true,
 		PageUsageByNUMA: cgroups.PageUsageByNUMA{
 			PageUsageByNUMAInner: cgroups.PageUsageByNUMAInner{
 				Total:       cgroups.PageStats{Total: 44611, Nodes: map[uint8]uint64{0: 32631, 1: 7501, 2: 1982, 3: 2497}},