added additional linux meminfo fields

mem/mem.go

@@ -57,6 +57,19 @@ type VirtualMemoryStat struct {
 	SwapCached     uint64 `json:"swapcached"`
 	CommitLimit    uint64 `json:"commitlimit"`
 	CommittedAS    uint64 `json:"committedas"`
+	HighTotal      uint64 `json:"hightotal"`
+	HighFree       uint64 `json:"highfree"`
+	LowTotal       uint64 `json:"lowtotal"`
+	LowFree        uint64 `json:"lowfree"`
+	SwapTotal      uint64 `json:"swaptotal"`
+	SwapFree       uint64 `json:"swapfree"`
+	Mapped         uint64 `json:"mapped"`
+	VMallocTotal   uint64 `json:"vmalloctotal"`
+	VMallocUsed    uint64 `json:"vmallocused"`
+	VMallocChunk   uint64 `json:"vmallocchunk"`
+	HugePagesTotal uint64 `json:"hugePagestotal"`
+	HugePagesFree  uint64 `json:"hugePagesfree"`
+	HugePageSize   uint64 `json:"hugepagesize"`
 }
 
 type SwapMemoryStat struct {

mem/mem_linux.go

@@ -69,6 +69,32 @@ func VirtualMemoryWithContext(ctx context.Context) (*VirtualMemoryStat, error) {
 			ret.CommitLimit = t * 1024
 		case "Committed_AS":
 			ret.CommittedAS = t * 1024
+		case "HighTotal":
+			ret.HighTotal = t * 1024
+		case "HighFree":
+			ret.HighFree = t * 1024
+		case "LowTotal":
+			ret.LowTotal = t * 1024
+		case "LowFree":
+			ret.LowFree = t * 1024
+		case "SwapTotal":
+			ret.SwapTotal = t * 1024
+		case "SwapFree":
+			ret.SwapFree = t * 1024
+		case "Mapped":
+			ret.Mapped = t * 1024
+		case "VmallocTotal":
+			ret.VMallocTotal = t * 1024
+		case "VmallocUsed":
+			ret.VMallocUsed = t * 1024
+		case "VmallocChunk":
+			ret.VMallocChunk = t * 1024
+		case "HugePages_Total":
+			ret.HugePagesTotal = t
+		case "HugePages_Free":
+			ret.HugePagesFree = t
+		case "Hugepagesize":
+			ret.HugePageSize = t * 1024
 		}
 	}
 	if !memavail {