Bug#929943: linux-image-4.19.0-5-amd64: NFS handle leak? Suspend-to-RAM inhibition
Package: src:linux
Version: 4.19.37-3
Severity: normal
Sequence of events:
1. Notebook is rebooted properly, used for work for some hours
2. Notebook lid was closed, STR works as usual
3. Notebook opened; some work; lid close, STR works
4. Notebook was opened; NFS4 from remote machine mounted
5. Files copied around
6. NFS server stopped (data only temporarily shared)
7. NFS unmounted via "umount dir/", returns immediately to shell
7. I remember that I stopped the server already, "umount dir/ -f &"
9. Closing the lid
6. About half an hour later I take the notebook from my bag and see that
it's still running
10. I see the messages about NFS
11. I start NFS again for a clean umount - but it's not mounted any more,
so there's nothing to umount
12. Manual "acpitool -s" (twice) doesn't work (19:34:26)
13. I stop the NFS server again
14. Closing the lid still doesn't work
15. I start NFS again
16. At 20:00 an "at" job stops the NFS server again
17. MUCH LATER one of the backgrounded "acpitool -s" seems to work,
notebook gets suspended while I'm working with it
18. Something's still thinking that NFS is mounted
Here's some log data, shortened/annotated:
16:24:14 2. PM: suspend entry (deep)
16:24:14 PM: Syncing filesystems ... done.
16:49:34 3. PM: suspend exit
17:13:53 " PM: suspend entry (deep)
18:23:36 " PM: Syncing filesystems ... done.
18:23:36 4. PM: suspend exit
18:41:39 9. PM: suspend entry (deep)
18:43:31 PM: Syncing filesystems ...
18:45:12 10. INFO: task systemd-sleep:3057 blocked for more than 120 seconds.
18:47:13 INFO: task systemd-sleep:3057 blocked for more than 120 seconds.
18:49:14 INFO: task systemd-sleep:3057 blocked for more than 120 seconds.
18:51:14 INFO: task systemd-sleep:3057 blocked for more than 120 seconds.
18:53:15 INFO: task systemd-sleep:3057 blocked for more than 120 seconds.
18:55:16 INFO: task systemd-sleep:3057 blocked for more than 120 seconds.
18:57:17 INFO: task systemd-sleep:3057 blocked for more than 120 seconds.
18:59:18 INFO: task systemd-sleep:3057 blocked for more than 120 seconds.
19:01:19 INFO: task systemd-sleep:3057 blocked for more than 120 seconds.
19:03:19 INFO: task systemd-sleep:3057 blocked for more than 120 seconds.
19:32:34 11. nfs: server rpi3 OK
19:34:26 12. PM: suspend entry (deep)
19:34:26 PM: suspend exit
19:34:30 PM: suspend entry (deep)
19:34:30 PM: suspend exit
19:37:09 14. PM: suspend entry (deep)
19:37:09 PM: suspend exit
19:40:27 15. nfs: server rpi3 OK
20:52:49 17. done.
20:52:49 Freezing user space processes ... (elapsed 0.029 seconds) done.
20:52:49 18. PM: suspend exit
20:55:33 nfs: server rpi3 not responding, timed out
I know this is not that easy to understand; still, I hope it's
reproducible.
Thank you!
-- Package-specific info:
** Version:
Linux version 4.19.0-5-amd64 (debian-kernel@lists.debian.org) (gcc version 8.3.0 (Debian 8.3.0-7)) #1 SMP Debian 4.19.37-3 (2019-05-15)
** Command line:
BOOT_IMAGE=/vmlinuz-4.19.0-5-amd64 root=/dev/mapper/n555--vg-root ro initrd=/install/initrd.gz quiet
** Not tainted
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