avoid use mp.cfg directly to avoid race

chain/messagepool/config.go

@@ -48,9 +48,13 @@ func saveConfig(cfg *types.MpoolConfig, ds dtypes.MetadataDS) error {
 }
 
 func (mp *MessagePool) GetConfig() *types.MpoolConfig {
-	mp.cfgLk.Lock()
-	defer mp.cfgLk.Unlock()
-	return mp.cfg.Clone()
+	return mp.getConfig().Clone()
+}
+
+func (mp *MessagePool) getConfig() *types.MpoolConfig {
+	mp.cfgLk.RLock()
+	defer mp.cfgLk.RUnlock()
+	return mp.cfg
 }
 
 func validateConfg(cfg *types.MpoolConfig) error {

chain/messagepool/messagepool.go

@@ -133,7 +133,7 @@ type MessagePool struct {
 	curTsLk sync.Mutex // DO NOT LOCK INSIDE lk
 	curTs   *types.TipSet
 
-	cfgLk sync.Mutex
+	cfgLk sync.RWMutex
 	cfg   *types.MpoolConfig
 
 	api Provider
@@ -781,7 +781,7 @@ func (mp *MessagePool) addLocked(m *types.SignedMessage, strict, untrusted bool)
 
 	if incr {
 		mp.currentSize++
-		if mp.currentSize > mp.cfg.SizeLimitHigh {
+		if mp.currentSize > mp.getConfig().SizeLimitHigh {
 			// send signal to prune messages if it hasnt already been sent
 			select {
 			case mp.pruneTrigger <- struct{}{}:

chain/messagepool/pruning.go

@@ -19,7 +19,8 @@ func (mp *MessagePool) pruneExcessMessages() error {
 	mp.lk.Lock()
 	defer mp.lk.Unlock()
 
-	if mp.currentSize < mp.cfg.SizeLimitHigh {
+	mpCfg := mp.getConfig()
+	if mp.currentSize < mpCfg.SizeLimitHigh {
 		return nil
 	}
 
@@ -27,7 +28,7 @@ func (mp *MessagePool) pruneExcessMessages() error {
 	case <-mp.pruneCooldown:
 		err := mp.pruneMessages(context.TODO(), ts)
 		go func() {
-			time.Sleep(mp.cfg.PruneCooldown)
+			time.Sleep(mpCfg.PruneCooldown)
 			mp.pruneCooldown <- struct{}{}
 		}()
 		return err
@@ -53,8 +54,9 @@ func (mp *MessagePool) pruneMessages(ctx context.Context, ts *types.TipSet) erro
 	// protected actors -- not pruned
 	protected := make(map[address.Address]struct{})
 
+	mpCfg := mp.getConfig()
 	// we never prune priority addresses
-	for _, actor := range mp.cfg.PriorityAddrs {
+	for _, actor := range mpCfg.PriorityAddrs {
 		protected[actor] = struct{}{}
 	}
 
@@ -90,7 +92,7 @@ func (mp *MessagePool) pruneMessages(ctx context.Context, ts *types.TipSet) erro
 	})
 
 	// Keep messages (remove them from pruneMsgs) from chains while we are under the low water mark
-	loWaterMark := mp.cfg.SizeLimitLow
+	loWaterMark := mpCfg.SizeLimitLow
 keepLoop:
 	for _, chain := range chains {
 		for _, m := range chain.msgs {

chain/messagepool/selection.go

@@ -532,14 +532,14 @@ func (mp *MessagePool) selectPriorityMessages(pending map[address.Address]map[ui
 			log.Infow("select priority messages done", "took", dt)
 		}
 	}()
-
-	result := make([]*types.SignedMessage, 0, mp.cfg.SizeLimitLow)
+	mpCfg := mp.getConfig()
+	result := make([]*types.SignedMessage, 0, mpCfg.SizeLimitLow)
 	gasLimit := int64(build.BlockGasLimit)
 	minGas := int64(gasguess.MinGas)
 
 	// 1. Get priority actor chains
 	var chains []*msgChain
-	priority := mp.cfg.PriorityAddrs
+	priority := mpCfg.PriorityAddrs
 	for _, actor := range priority {
 		mset, ok := pending[actor]
 		if ok {