diff --git a/documentation/en/default-lotus-config.toml b/documentation/en/default-lotus-config.toml
index ad917814b..1c9caf3a0 100644
--- a/documentation/en/default-lotus-config.toml
+++ b/documentation/en/default-lotus-config.toml
@@ -23,6 +23,12 @@
   #DisableMetadataLog = false
 
 
+[Logging]
+  [Logging.SubsystemLevels]
+    # env var: LOTUS_LOGGING_SUBSYSTEMLEVELS_EXAMPLE-SUBSYSTEM
+    #example-subsystem = "INFO"
+
+
 [Libp2p]
   # Binding address for the libp2p host - 0 means random port.
   # Format: multiaddress; see https://multiformats.io/multiaddr/
diff --git a/documentation/en/default-lotus-miner-config.toml b/documentation/en/default-lotus-miner-config.toml
index 00370a9cc..a6a36f742 100644
--- a/documentation/en/default-lotus-miner-config.toml
+++ b/documentation/en/default-lotus-miner-config.toml
@@ -23,6 +23,12 @@
   #DisableMetadataLog = false
 
 
+[Logging]
+  [Logging.SubsystemLevels]
+    # env var: LOTUS_LOGGING_SUBSYSTEMLEVELS_EXAMPLE-SUBSYSTEM
+    #example-subsystem = "INFO"
+
+
 [Libp2p]
   # Binding address for the libp2p host - 0 means random port.
   # Format: multiaddress; see https://multiformats.io/multiaddr/
diff --git a/lib/lotuslog/config.go b/lib/lotuslog/config.go
new file mode 100644
index 000000000..bf6ceb63f
--- /dev/null
+++ b/lib/lotuslog/config.go
@@ -0,0 +1,11 @@
+package lotuslog
+
+import logging "github.com/ipfs/go-log/v2"
+
+func SetLevelsFromConfig(l map[string]string) {
+	for sys, level := range l {
+		if err := logging.SetLogLevel(sys, level); err != nil {
+			continue
+		}
+	}
+}
diff --git a/node/builder.go b/node/builder.go
index 81de3890d..acda5a07a 100644
--- a/node/builder.go
+++ b/node/builder.go
@@ -33,6 +33,7 @@ import (
 	"github.com/filecoin-project/lotus/extern/sector-storage/stores"
 	"github.com/filecoin-project/lotus/journal"
 	"github.com/filecoin-project/lotus/journal/alerting"
+	"github.com/filecoin-project/lotus/lib/lotuslog"
 	"github.com/filecoin-project/lotus/lib/peermgr"
 	_ "github.com/filecoin-project/lotus/lib/sigs/bls"
 	_ "github.com/filecoin-project/lotus/lib/sigs/secp"
@@ -249,6 +250,9 @@ func Base() Option {
 
 // Config sets up constructors based on the provided Config
 func ConfigCommon(cfg *config.Common, enableLibp2pNode bool) Option {
+	// setup logging early
+	lotuslog.SetLevelsFromConfig(cfg.Logging.SubsystemLevels)
+
 	return Options(
 		func(s *Settings) error { s.Config = true; return nil },
 		Override(new(dtypes.APIEndpoint), func() (dtypes.APIEndpoint, error) {
diff --git a/node/config/def.go b/node/config/def.go
index 233eccdd5..edc7ffef5 100644
--- a/node/config/def.go
+++ b/node/config/def.go
@@ -47,6 +47,11 @@ func defCommon() Common {
 			ListenAddress: "/ip4/127.0.0.1/tcp/1234/http",
 			Timeout:       Duration(30 * time.Second),
 		},
+		Logging: Logging{
+			SubsystemLevels: map[string]string{
+				"example-subsystem": "INFO",
+			},
+		},
 		Libp2p: Libp2p{
 			ListenAddresses: []string{
 				"/ip4/0.0.0.0/tcp/0",
diff --git a/node/config/def_test.go b/node/config/def_test.go
index a7a0e77ca..9601ee95b 100644
--- a/node/config/def_test.go
+++ b/node/config/def_test.go
@@ -32,6 +32,24 @@ func TestDefaultFullNodeRoundtrip(t *testing.T) {
 	require.True(t, reflect.DeepEqual(c, c2))
 }
 
+func TestDefaultFullNodeCommentRoundtrip(t *testing.T) {
+	c := DefaultFullNode()
+
+	var s string
+	{
+		c, err := ConfigComment(DefaultFullNode())
+		require.NoError(t, err)
+		s = string(c)
+	}
+
+	c2, err := FromReader(strings.NewReader(s), DefaultFullNode())
+	require.NoError(t, err)
+
+	fmt.Println(s)
+
+	require.True(t, reflect.DeepEqual(c, c2))
+}
+
 func TestDefaultMinerRoundtrip(t *testing.T) {
 	c := DefaultStorageMiner()
 
diff --git a/node/config/doc_gen.go b/node/config/doc_gen.go
index ccee363b4..edb4cf892 100644
--- a/node/config/doc_gen.go
+++ b/node/config/doc_gen.go
@@ -127,6 +127,12 @@ of automatically performing on-chain operations.`,
 
 			Comment: ``,
 		},
+		{
+			Name: "Logging",
+			Type: "Logging",
+
+			Comment: ``,
+		},
 		{
 			Name: "Libp2p",
 			Type: "Libp2p",
@@ -484,6 +490,14 @@ count towards this limit.`,
 closed by the connection manager.`,
 		},
 	},
+	"Logging": []DocField{
+		{
+			Name: "SubsystemLevels",
+			Type: "map[string]string",
+
+			Comment: `SubsystemLevels specify per-subsystem log levels`,
+		},
+	},
 	"MinerAddressConfig": []DocField{
 		{
 			Name: "PreCommitControl",
diff --git a/node/config/doc_util.go b/node/config/doc_util.go
index ee70a9cfd..b88333238 100644
--- a/node/config/doc_util.go
+++ b/node/config/doc_util.go
@@ -16,7 +16,7 @@ func findDoc(root interface{}, section, name string) *DocField {
 	return findDocSect("Common", section, name)
 }
 
-func findDocSect(root string, section, name string) *DocField {
+func findDocSect(root, section, name string) *DocField {
 	path := strings.Split(section, ".")
 
 	docSection := Doc[root]
diff --git a/node/config/load.go b/node/config/load.go
index db3914b6b..a76db7caf 100644
--- a/node/config/load.go
+++ b/node/config/load.go
@@ -69,7 +69,7 @@ func ConfigUpdate(cfgCur, cfgDef interface{}, comment bool) ([]byte, error) {
 	}
 
 	if comment {
-		// create a map of default lines so we can comment those out later
+		// create a map of default lines, so we can comment those out later
 		defLines := strings.Split(defStr, "\n")
 		defaults := map[string]struct{}{}
 		for i := range defLines {
diff --git a/node/config/types.go b/node/config/types.go
index 55f924f2a..8320aea7e 100644
--- a/node/config/types.go
+++ b/node/config/types.go
@@ -13,10 +13,11 @@ import (
 
 // Common is common config between full node and miner
 type Common struct {
-	API    API
-	Backup Backup
-	Libp2p Libp2p
-	Pubsub Pubsub
+	API     API
+	Backup  Backup
+	Logging Logging
+	Libp2p  Libp2p
+	Pubsub  Pubsub
 }
 
 // FullNode is a full node config
@@ -39,6 +40,12 @@ type Backup struct {
 	DisableMetadataLog bool
 }
 
+// Logging is the logging system config
+type Logging struct {
+	// SubsystemLevels specify per-subsystem log levels
+	SubsystemLevels map[string]string
+}
+
 // StorageMiner is a miner config
 type StorageMiner struct {
 	Common