From ac37fc149e158a0db781e48f41c299cc629f1572 Mon Sep 17 00:00:00 2001 From: Giuseppe Scrivano Date: Wed, 13 Mar 2019 13:59:16 +0100 Subject: slirp4netns: set mtu to 65520 it improves significantly the performance of the slirp4netns network: https://github.com/rootless-containers/slirp4netns/tree/777bdccceffa5bee38dbfd9eefc06628cc160ff6#iperf3-netns---host Closes: https://github.com/containers/libpod/issues/1732 Signed-off-by: Giuseppe Scrivano --- libpod/networking_linux.go | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/libpod/networking_linux.go b/libpod/networking_linux.go index 80d7d8213..b7f1c2f1b 100644 --- a/libpod/networking_linux.go +++ b/libpod/networking_linux.go @@ -162,9 +162,9 @@ func (r *Runtime) setupRootlessNetNS(ctr *Container) (err error) { var cmd *exec.Cmd if havePortMapping { // if we need ports to be mapped from the host, create a API socket to use for communicating with slirp4netns. - cmd = exec.Command(path, "-c", "-e", "3", "-r", "4", "--api-socket", apiSocket, fmt.Sprintf("%d", ctr.state.PID), "tap0") + cmd = exec.Command(path, "--mtu", "65520", "-c", "-e", "3", "-r", "4", "--api-socket", apiSocket, fmt.Sprintf("%d", ctr.state.PID), "tap0") } else { - cmd = exec.Command(path, "-c", "-e", "3", "-r", "4", fmt.Sprintf("%d", ctr.state.PID), "tap0") + cmd = exec.Command(path, "--mtu", "65520", "-c", "-e", "3", "-r", "4", fmt.Sprintf("%d", ctr.state.PID), "tap0") } cmd.SysProcAttr = &syscall.SysProcAttr{ -- cgit v1.2.3-54-g00ecf