For curiosity I upgraded the kernel of my VPS running Debian 11 from 5.10 to 6.1. The networking became visibly slower. All TCP receive and send rate droped to at least 1/4 of the original. I had to restore the original kernel and the network became fine again.
I don't think it is a bug in the kernel. More likely the userspace or the host system needs to be reconfigured to work well with the bleeding edge kernel. Still I am curious, what exactly may cause this dramatic drop?
I don't think it is a bug in the kernel. More likely the userspace or the host system needs to be reconfigured to work well with the bleeding edge kernel. Still I am curious, what exactly may cause this dramatic drop?