Mount options (all names and IPs redacted):

# mount | grep mount-name | sed -e's/,/\n,/g'
//server-name/mount-name on /mnt/mount-name type cifs (rw
,relatime
,vers=3.1.1
,cache=strict
,username=client-name
,domain=domain-name
,uid=0
,noforceuid
,gid=0
,noforcegid
,addr=192.1.1.123
,file_mode=0600
,dir_mode=0700
,seal
,soft
,nounix
,serverino
,mapposix
,mfsymlinks
,rsize=4194304
,wsize=4194304
,bsize=1048576
,echo_interval=60
,actimeo=1
,closetimeo=1)

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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-signed-hwe-6.5 in Ubuntu.
https://bugs.launchpad.net/bugs/2049242

Title:
  CIFS Mounts Keep Load Average at n+1

Status in linux-signed-hwe-6.5 package in Ubuntu:
  New

Bug description:
  Today I noticed that my two primary Ubuntu boxes were running at high
  load.  After investigation, I discovered at that unmounting their CIFS
  shares alleviating the high load.

  I rebooted to the previous kernel, linux-modules-6.2.0-39-generic, and
  saw that the load was low after everything had settled after startup.

  I rebooted to the current kernel, linux-modules-6.5.0-14-generic, and
  again saw the high load.

  The load appears to be n+1, where n is the number of CIFS mounts.
  (Based on a sample of two boxes.)

  I confirmed that the default mount options (e.g. the ones not
  specified in fstab) are the same between the two kernels.

  This *might* also be slowing down external (USB  disk access.  I'm
  still investigating that.

  ProblemType: Bug
  DistroRelease: Ubuntu 22.04
  Package: linux-image-6.5.0-14-generic 6.5.0-14.14~22.04.1
  ProcVersionSignature: Ubuntu 6.5.0-14.14~22.04.1-generic 6.5.3
  Uname: Linux 6.5.0-14-generic x86_64
  ApportVersion: 2.20.11-0ubuntu82.5
  Architecture: amd64
  CasperMD5CheckResult: unknown
  CurrentDesktop: ubuntu:GNOME
  Date: Fri Jan 12 19:47:25 2024
  InstallationDate: Installed on 2020-10-01 (1198 days ago)
  InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: linux-signed-hwe-6.5
  UpgradeStatus: Upgraded to jammy on 2023-01-01 (376 days ago)

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