I can confirm that the (naive) patch sidesteps the issue, but that it is otherwise present on all our 5.15/ZFS installs.
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to zfs-linux in Ubuntu. https://bugs.launchpad.net/bugs/1980848 Title: arc_summary doesn't work with HWE kernel 5.15 Status in zfs-linux package in Ubuntu: Confirmed Bug description: # Issue description `arc_summary` no longer works with kernel 5.15. It used to work with previous kernel like 5.13. # Steps to reproduce 1) setup 20.04 with HWE kernel 5.15 2) install `zfsutils-linux` 3) run `arc_summary` $ arc_summary Traceback (most recent call last): File "/usr/sbin/arc_summary", line 875, in <module> main() File "/usr/sbin/arc_summary", line 826, in main kstats = get_kstats() File "/usr/sbin/arc_summary", line 259, in get_kstats with open(PROC_PATH+section, 'r') as proc_location: FileNotFoundError: [Errno 2] No such file or directory: '/proc/spl/kstat/zfs/xuio_stats' Indeed, the xuio_stats file isn't there anymore: $ ll /proc/spl/kstat/zfs/ total 0 dr-xr-xr-x 21 root root 0 Jul 6 10:49 ./ dr-xr-xr-x 4 root root 0 Jul 6 10:49 ../ -rw-r--r-- 1 root root 0 Jul 6 10:49 abdstats -rw-r--r-- 1 root root 0 Jul 6 10:49 arcstats dr-xr-xr-x 20 root root 0 Jul 6 10:49 data/ -rw------- 1 root root 0 Jul 6 10:49 dbgmsg -rw------- 1 root root 0 Jul 6 10:49 dbufs -rw-r--r-- 1 root root 0 Jul 6 10:49 dbufstats dr-xr-xr-x 70 root root 0 Jul 6 10:49 default/ -rw-r--r-- 1 root root 0 Jul 6 10:49 dmu_tx -rw-r--r-- 1 root root 0 Jul 6 10:49 dnodestats -rw-r--r-- 1 root root 0 Jul 6 10:49 fletcher_4_bench -rw-r--r-- 1 root root 0 Jul 6 10:49 fm -rw-r--r-- 1 root root 0 Jul 6 10:49 import_progress -rw-r--r-- 1 root root 0 Jul 6 10:49 metaslab_stats -rw-r--r-- 1 root root 0 Jul 6 10:49 vdev_cache_stats -rw-r--r-- 1 root root 0 Jul 6 10:49 vdev_mirror_stats -rw-r--r-- 1 root root 0 Jul 6 10:49 vdev_raidz_bench -rw-r--r-- 1 root root 0 Jul 6 10:49 zfetchstats -rw-r--r-- 1 root root 0 Jul 6 10:49 zil -rw-r--r-- 1 root root 0 Jul 6 10:49 zstd # Workaround This (naive) patch sidesteps the problem: $ diff -Naur /usr/sbin/arc_summary.old /usr/sbin/arc_summary --- /usr/sbin/arc_summary.old 2022-07-06 10:59:50.752833101 -0400 +++ /usr/sbin/arc_summary 2022-07-06 10:59:22.449113169 -0400 @@ -255,6 +255,8 @@ secs = SECTION_PATHS.values() for section in secs: + if not os.path.exists(PROC_PATH+section): + continue with open(PROC_PATH+section, 'r') as proc_location: lines = [line for line in proc_location] # Additional information $ lsb_release -rd Description: Ubuntu 20.04.4 LTS Release: 20.04 $ uname -r 5.15.0-41-generic $ apt-cache policy zfsutils-linux linux-image-generic-hwe-20.04 zfsutils-linux: Installed: 0.8.3-1ubuntu12.14 Candidate: 0.8.3-1ubuntu12.14 Version table: *** 0.8.3-1ubuntu12.14 500 500 http://us.archive.ubuntu.com/ubuntu focal-updates/main amd64 Packages 100 /var/lib/dpkg/status 0.8.3-1ubuntu12.9 500 500 http://security.ubuntu.com/ubuntu focal-security/main amd64 Packages 0.8.3-1ubuntu12 500 500 http://us.archive.ubuntu.com/ubuntu focal/main amd64 Packages linux-image-generic-hwe-20.04: Installed: 5.15.0.41.44~20.04.13 Candidate: 5.15.0.41.44~20.04.13 Version table: *** 5.15.0.41.44~20.04.13 400 400 http://us.archive.ubuntu.com/ubuntu focal-proposed/main amd64 Packages 100 /var/lib/dpkg/status 5.13.0.52.59~20.04.31 500 500 http://us.archive.ubuntu.com/ubuntu focal-updates/main amd64 Packages 500 http://security.ubuntu.com/ubuntu focal-security/main amd64 Packages 5.4.0.26.32 500 500 http://us.archive.ubuntu.com/ubuntu focal/main amd64 Packages To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/zfs-linux/+bug/1980848/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
