Ubuntu
linux package

  1. Bug #1828978
  2. Comment #0

Comment 0 for bug 1828978

Revision history for this message
Frank Burkhardt (fbo) wrote : NFS connections block while causing a high-bandwidth RPC-pingpong between client and server

There's a bug in kernels before Linux 5.0 that affects NFS 4.1 connections. The bug presents itself like this:
   * On NFS clients: Attempts to access mounted NFS shares associated with the affected server
     block indefinitely.
   * On the network: A storm of repeated RPCs between NFS client and server uses a lot
     of bandwidth. Each RPC is acknoledged by the server with an NFS4ERR_SEQ_MISORDERED error.
   * Other NFS clients connected to the same NFS server: Performance drops dramatically.

A patch is available to fix this problem:

<https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3453d5708b33efe76f40eca1c0ed60923094b971>

Is is possible to integrate the patch into the 4.18 kernel series?
I'm using Ubuntu 18.04.2 LTS as NFS client an server.

Thank you.

Best regards,

Frank Burkhardt