GL-X3000 Spitz AX "skb_tailroom small" and unstable connection

Technical Support for Routers
1

Hey folks,

I’ve been experiencing intermittent instability with my modem’s connection. It mostly works well but UL/DL speed sometimes gets really slow.

Upon reviewing the log files, the sole warning or error is related to “skb_tailroom small” as follows:

Tue May  7 12:18:10 2024 kern.debug kernel: [29864.374930] skb_tailroom small!
Tue May  7 12:18:11 2024 kern.debug kernel: [29865.139792] skb_tailroom small!
Tue May  7 12:27:48 2024 kern.debug kernel: [30442.538529] skb_tailroom small!
Tue May  7 12:30:01 2024 kern.debug kernel: [30575.050181] skb_tailroom small!
Tue May  7 12:30:57 2024 kern.debug kernel: [30630.909094] skb_tailroom small!
Tue May  7 12:30:58 2024 kern.debug kernel: [30632.278750] skb_tailroom small!
Tue May  7 12:30:58 2024 kern.debug kernel: [30632.374891] skb_tailroom small!
Tue May  7 12:30:58 2024 kern.debug kernel: [30632.733380] skb_tailroom small!
Tue May  7 12:30:59 2024 kern.debug kernel: [30633.688232] skb_tailroom small!
Tue May  7 12:31:00 2024 kern.debug kernel: [30633.798651] skb_tailroom small!
Tue May  7 12:31:00 2024 kern.debug kernel: [30634.603765] skb_tailroom small!
Tue May  7 12:31:01 2024 kern.debug kernel: [30635.373937] skb_tailroom small!
Tue May  7 12:31:01 2024 kern.debug kernel: [30635.524287] skb_tailroom small!
Tue May  7 12:31:05 2024 kern.debug kernel: [30639.157152] skb_tailroom small!
Tue May  7 12:31:05 2024 kern.debug kernel: [30639.339020] skb_tailroom small!
Tue May  7 12:31:07 2024 kern.debug kernel: [30641.468769] skb_tailroom small!
Tue May  7 12:31:08 2024 kern.debug kernel: [30642.718064] skb_tailroom small!
Tue May  7 12:31:09 2024 kern.debug kernel: [30642.880683] skb_tailroom small!
Tue May  7 12:37:05 2024 kern.debug kernel: [30999.052155] skb_tailroom small!
Tue May  7 12:38:06 2024 kern.debug kernel: [31059.654468] skb_tailroom small!
Tue May  7 12:42:54 2024 kern.debug kernel: [31348.414517] skb_tailroom small!

Any idea what these logs mean? Here is the summary of my setup:

  • Using T-mobile 5G SA with band lock (N41)
  • Router firmware: 4.0 (2024-04-19)
  • Modem firmware: RM520NGLAAR03A03M4G_01.201.01.201
  • Using WireGuard client with VPN Policy Base on the Target Domain or IP
  • Using IGMPv3
2

Welcome to the forum. I cannot help you much here, but I will be following. I run into times (not lately - knocking on wood) with dropped packets over wireguard using TMHI on my X3000. I am not sure if I have seen those messages, so I will look and follow up if I have, but it has been pretty solid for nearly 9 days now. I am not touching it until it starts messing up again :). I was getting full speed and no dropped packets straight to the internet though (I am running split tunnel right now while RV is stored, I switch to everything tunneled when camping).

3

@Stereo1324 should i buy GL-X3000 Spitz? is this provide stable internet for 24x7?

4

I'm not sure if my connection is unstable but i'm seeing the same message in kernel and system logs. I'm not running Wireguard. Have same firmware, T-mobile,same band locking on NR5G SA 41. I have no clue what it is but I'm following this to learn.