diff --git a/Makefile b/Makefile
index 2f190c4a30..7e14884137 100644
--- a/Makefile
+++ b/Makefile
@@ -107,6 +107,7 @@ DEFENABLEHUGEPAGES := false
 DEFENABLESWAP := false
 DEFENABLEDEBUG := false
 DEFDISABLENESTINGCHECKS := false
+DEFMSIZE9P := 8192
 
 SED = sed
 
@@ -179,6 +180,7 @@ USER_VARS += DEFENABLEHUGEPAGES
 USER_VARS += DEFENABLESWAP
 USER_VARS += DEFENABLEDEBUG
 USER_VARS += DEFDISABLENESTINGCHECKS
+USER_VARS += DEFMSIZE9P
 
 V              = @
 Q              = $(V:1=)
@@ -271,6 +273,7 @@ const defaultEnableHugePages bool = $(DEFENABLEHUGEPAGES)
 const defaultEnableSwap bool = $(DEFENABLESWAP)
 const defaultEnableDebug bool = $(DEFENABLEDEBUG)
 const defaultDisableNestingChecks bool = $(DEFDISABLENESTINGCHECKS)
+const defaultMsize9p uint32 = $(DEFMSIZE9P)
 
 // Default config file used by stateless systems.
 var defaultRuntimeConfiguration = "$(DESTCONFIG)"
@@ -355,6 +358,7 @@ $(GENERATED_FILES): %: %.in Makefile VERSION
 		-e "s|@DEFENABLEMSWAP@|$(DEFENABLESWAP)|g" \
 		-e "s|@DEFENABLEDEBUG@|$(DEFENABLEDEBUG)|g" \
 		-e "s|@DEFDISABLENESTINGCHECKS@|$(DEFDISABLENESTINGCHECKS)|g" \
+		-e "s|@DEFMSIZE9P@|$(DEFMSIZE9P)|g" \
 		$< > $@
 
 generate-config: $(CONFIG)
diff --git a/cli/config.go b/cli/config.go
index c36e5f3577..f5b70b7b00 100644
--- a/cli/config.go
+++ b/cli/config.go
@@ -76,8 +76,9 @@ type hypervisor struct {
 	DefaultVCPUs          int32  `toml:"default_vcpus"`
 	DefaultMemSz          uint32 `toml:"default_memory"`
 	DefaultBridges        uint32 `toml:"default_bridges"`
-	DisableBlockDeviceUse bool   `toml:"disable_block_device_use"`
+	Msize9p               uint32 `toml:"msize_9p"`
 	BlockDeviceDriver     string `toml:"block_device_driver"`
+	DisableBlockDeviceUse bool   `toml:"disable_block_device_use"`
 	MemPrealloc           bool   `toml:"enable_mem_prealloc"`
 	HugePages             bool   `toml:"enable_hugepages"`
 	Swap                  bool   `toml:"enable_swap"`
@@ -233,6 +234,14 @@ func (h hypervisor) blockDeviceDriver() (string, error) {
 	return h.BlockDeviceDriver, nil
 }
 
+func (h hypervisor) msize9p() uint32 {
+	if h.Msize9p == 0 {
+		return defaultMsize9p
+	}
+
+	return h.Msize9p
+}
+
 func (p proxy) path() string {
 	if p.Path == "" {
 		return defaultProxyPath
@@ -314,6 +323,7 @@ func newQemuHypervisorConfig(h hypervisor) (vc.HypervisorConfig, error) {
 		DisableNestingChecks:  h.DisableNestingChecks,
 		BlockDeviceDriver:     blockDriver,
 		EnableIOThreads:       h.EnableIOThreads,
+		Msize9p:               h.msize9p(),
 	}, nil
 }
 
@@ -417,6 +427,7 @@ func loadConfiguration(configPath string, ignoreLogging bool) (resolvedConfigPat
 		DisableNestingChecks:  defaultDisableNestingChecks,
 		BlockDeviceDriver:     defaultBlockDeviceDriver,
 		EnableIOThreads:       defaultEnableIOThreads,
+		Msize9p:               defaultMsize9p,
 	}
 
 	err = config.InterNetworkModel.SetModel(defaultInterNetworkingModel)
diff --git a/cli/config/configuration.toml.in b/cli/config/configuration.toml.in
index b8ea01d8b2..7753093219 100644
--- a/cli/config/configuration.toml.in
+++ b/cli/config/configuration.toml.in
@@ -110,6 +110,10 @@ enable_iothreads = @DEFENABLEIOTHREADS@
 # 
 #disable_nesting_checks = true
 
+# This is the msize used for 9p shares. It is the number of bytes 
+# used for 9p packet payload.
+#msize_9p = @DEFMSIZE9P@
+
 [proxy.@PROJECT_TYPE@]
 path = "@PROXYPATH@"
 
diff --git a/cli/config_test.go b/cli/config_test.go
index 1b974dde9f..fc24137a42 100644
--- a/cli/config_test.go
+++ b/cli/config_test.go
@@ -47,6 +47,7 @@ func makeRuntimeConfigFileData(hypervisor, hypervisorPath, kernelPath, imagePath
 	default_memory = ` + strconv.FormatUint(uint64(defaultMemSize), 10) + `
 	disable_block_device_use =  ` + strconv.FormatBool(disableBlock) + `
 	enable_iothreads =  ` + strconv.FormatBool(enableIOThreads) + `
+	msize_9p = ` + strconv.FormatUint(uint64(defaultMsize9p), 10) + `
 
 	[proxy.kata]
 	path = "` + proxyPath + `"
@@ -134,6 +135,7 @@ func createAllRuntimeConfigFiles(dir, hypervisor string) (config testRuntimeConf
 		DefaultBridges:        defaultBridgesCount,
 		Mlock:                 !defaultEnableSwap,
 		EnableIOThreads:       enableIOThreads,
+		Msize9p:               defaultMsize9p,
 	}
 
 	agentConfig := vc.KataAgentConfig{}
@@ -516,6 +518,7 @@ func TestMinimalRuntimeConfig(t *testing.T) {
 		DefaultBridges:        defaultBridgesCount,
 		Mlock:                 !defaultEnableSwap,
 		BlockDeviceDriver:     defaultBlockDeviceDriver,
+		Msize9p:               defaultMsize9p,
 	}
 
 	expectedAgentConfig := vc.KataAgentConfig{}
diff --git a/cli/kata-env.go b/cli/kata-env.go
index bcbd53d7d2..36cdd43ef4 100644
--- a/cli/kata-env.go
+++ b/cli/kata-env.go
@@ -21,7 +21,7 @@ import (
 //
 // XXX: Increment for every change to the output format
 // (meaning any change to the EnvInfo type).
-const formatVersion = "1.0.10"
+const formatVersion = "1.0.11"
 
 // MetaInfo stores information on the format of the output itself
 type MetaInfo struct {
@@ -75,8 +75,9 @@ type HypervisorInfo struct {
 	MachineType       string
 	Version           string
 	Path              string
-	Debug             bool
 	BlockDeviceDriver string
+	Msize9p           uint32
+	Debug             bool
 }
 
 // ProxyInfo stores proxy details
@@ -271,6 +272,7 @@ func getHypervisorInfo(config oci.RuntimeConfig) HypervisorInfo {
 		Version:           version,
 		Path:              hypervisorPath,
 		BlockDeviceDriver: config.HypervisorConfig.BlockDeviceDriver,
+		Msize9p:           config.HypervisorConfig.Msize9p,
 	}
 }
 
diff --git a/cli/kata-env_test.go b/cli/kata-env_test.go
index 07d74c3260..1c0c955ff6 100644
--- a/cli/kata-env_test.go
+++ b/cli/kata-env_test.go
@@ -232,6 +232,7 @@ func getExpectedHypervisor(config oci.RuntimeConfig) HypervisorInfo {
 		Path:              config.HypervisorConfig.HypervisorPath,
 		MachineType:       config.HypervisorConfig.HypervisorMachineType,
 		BlockDeviceDriver: config.HypervisorConfig.BlockDeviceDriver,
+		Msize9p:           config.HypervisorConfig.Msize9p,
 	}
 }
 
diff --git a/virtcontainers/api_test.go b/virtcontainers/api_test.go
index f6eaf5c20a..6c3af7784c 100644
--- a/virtcontainers/api_test.go
+++ b/virtcontainers/api_test.go
@@ -902,6 +902,7 @@ func TestStatusSandboxSuccessfulStateReady(t *testing.T) {
 		DefaultBridges:    defaultBridges,
 		BlockDeviceDriver: defaultBlockDriver,
 		DefaultMaxVCPUs:   defaultMaxQemuVCPUs,
+		Msize9p:           defaultMsize9p,
 	}
 
 	expectedStatus := SandboxStatus{
@@ -958,6 +959,7 @@ func TestStatusSandboxSuccessfulStateRunning(t *testing.T) {
 		DefaultBridges:    defaultBridges,
 		BlockDeviceDriver: defaultBlockDriver,
 		DefaultMaxVCPUs:   defaultMaxQemuVCPUs,
+		Msize9p:           defaultMsize9p,
 	}
 
 	expectedStatus := SandboxStatus{
diff --git a/virtcontainers/hypervisor.go b/virtcontainers/hypervisor.go
index 45990535d0..277ff06e7c 100644
--- a/virtcontainers/hypervisor.go
+++ b/virtcontainers/hypervisor.go
@@ -215,6 +215,9 @@ type HypervisorConfig struct {
 	// DisableNestingChecks is used to override customizations performed
 	// when running on top of another VMM.
 	DisableNestingChecks bool
+
+	// Msize9p is used as the msize for 9p shares
+	Msize9p uint32
 }
 
 func (conf *HypervisorConfig) valid() (bool, error) {
@@ -246,6 +249,10 @@ func (conf *HypervisorConfig) valid() (bool, error) {
 		conf.DefaultMaxVCPUs = defaultMaxQemuVCPUs
 	}
 
+	if conf.Msize9p == 0 {
+		conf.Msize9p = defaultMsize9p
+	}
+
 	return true, nil
 }
 
diff --git a/virtcontainers/hypervisor_test.go b/virtcontainers/hypervisor_test.go
index 5a9957eda5..e9f0caabaa 100644
--- a/virtcontainers/hypervisor_test.go
+++ b/virtcontainers/hypervisor_test.go
@@ -171,7 +171,9 @@ func TestHypervisorConfigDefaults(t *testing.T) {
 		DefaultBridges:    defaultBridges,
 		BlockDeviceDriver: defaultBlockDriver,
 		DefaultMaxVCPUs:   defaultMaxQemuVCPUs,
+		Msize9p:           defaultMsize9p,
 	}
+
 	if reflect.DeepEqual(hypervisorConfig, hypervisorConfigDefaultsExpected) == false {
 		t.Fatal()
 	}
diff --git a/virtcontainers/kata_agent.go b/virtcontainers/kata_agent.go
index f9c3dab4a3..bcd0b6367e 100644
--- a/virtcontainers/kata_agent.go
+++ b/virtcontainers/kata_agent.go
@@ -474,6 +474,8 @@ func (k *kataAgent) startSandbox(sandbox Sandbox) error {
 		}
 	}
 
+	sharedDir9pOptions = append(sharedDir9pOptions, fmt.Sprintf("msize=%d", sandbox.config.HypervisorConfig.Msize9p))
+
 	// We mount the shared directory in a predefined location
 	// in the guest.
 	// This is where at least some of the host config files
diff --git a/virtcontainers/qemu_arch_base.go b/virtcontainers/qemu_arch_base.go
index 71189574e1..8d11024fe0 100644
--- a/virtcontainers/qemu_arch_base.go
+++ b/virtcontainers/qemu_arch_base.go
@@ -97,6 +97,7 @@ const (
 	defaultCPUModel         = "host"
 	defaultBridgeBus        = "pcie.0"
 	maxDevIDSize            = 31
+	defaultMsize9p          = 8192
 )
 
 const (
diff --git a/virtcontainers/qemu_test.go b/virtcontainers/qemu_test.go
index 367c724f5e..b06124bbf8 100644
--- a/virtcontainers/qemu_test.go
+++ b/virtcontainers/qemu_test.go
@@ -28,6 +28,7 @@ func newQemuConfig() HypervisorConfig {
 		DefaultBridges:    defaultBridges,
 		BlockDeviceDriver: defaultBlockDriver,
 		DefaultMaxVCPUs:   defaultMaxQemuVCPUs,
+		Msize9p:           defaultMsize9p,
 	}
 }