Is this still and issue for you?
You may be able to identify the processes that are causing the problem
using the fuser command, e.g. on mounted zfs file system /poolname use:
fuser -vm /poolname
maybe that helps.
** Changed in: zfs-linux (Ubuntu)
Status: New => Incomplete
** Changed in: zfs-linux (Ubuntu)
Importance: Undecided => Low
** Changed in: zfs-linux (Ubuntu)
Assignee: (unassigned) => Colin Ian King (colin-king)
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https://bugs.launchpad.net/bugs/1722261
Title:
deadlock in mount umount and sync
Status in zfs-linux package in Ubuntu:
Incomplete
Bug description:
I use zfs vesion 0.6.5.6 on Ubuntu 16.04.2 LTS . I have many zombie
process on auto-mount of snapshot and on sync !
903 process are in deadlock. i can't mount a new file system or snapshot .
Partial output of ps alx |grep 'call_r D' below .
what is the cause? what can I do ?
0 0 2371 1 20 0 6016 752 call_r D ? 0:00
/bin/sync
0 0 15290 1 20 0 6016 676 call_r D ? 0:00
/bin/sync
0 0 18919 1 20 0 6016 708 call_r D ? 0:00
/bin/sync
0 0 27076 1 20 0 6016 808 call_r D ? 0:00
/bin/sync
4 0 31976 1 20 0 22084 1344 call_r D ? 0:00 umount
-t zfs -n /samba/shares/Aat/.zfs/snapshot/2017-10-04_09.00.05--5d
error in kern.log:
9 13:20:28 zfs-cis kernel: [5368563.592834] WARNING: Unable to automount
/samba/shares/Trapianti/.zfs/snapshot/2017-10-03_08.00.03--5d/pool_z2_samba/shares/Trapianti@2017-10-03_08.00.03--5d:
256
Oct 9 13:20:28 zfs-cis kernel: [5368563.597868] WARNING: Unable to automount
/samba/shares/Trapianti/.zfs/snapshot/2017-10-03_08.00.03--5d/pool_z2_samba/shares/Trapianti@2017-10-03_08.00.03--5d:
256
Oct 9 13:20:28 zfs-cis kernel: [5368563.601730] WARNING: Unable to automount
/samba/shares/Trapianti/.zfs/snapshot/2017-10-03_08.00.03--5d/pool_z2_samba/shares/Trapianti@2017-10-03_08.00.03--5d:
256
Oct 9 13:22:57 zfs-cis kernel: [5368713.187001] WARNING: Unable to automount
/samba/shares/Trapianti/.zfs/snapshot/2017-10-03_10.00.03--5d/pool_z2_samba/shares/Trapianti@2017-10-03_10.00.03--5d:
256
Oct 9 13:22:57 zfs-cis kernel: [5368713.188883] WARNING: Unable to automount
/samba/shares/Cardiologia2/.zfs/snapshot/2017-10-03_12.00.03--5d/pool_z2_samba/shares/Cardiologia2@2017-10-03_12.00.03--5d:
256
Oct 9 13:22:57 zfs-cis kernel: [5368713.188885] WARNING: Unable to automount
/samba/shares/Trapianti/.zfs/snapshot/2017-10-03_14.00.04--5d/pool_z2_samba/shares/Trapianti@2017-10-03_14.00.04--5d:
256
Oct 9 13:22:57 zfs-cis kernel: [5368713.189005] WARNING: Unable to automount
/samba/shares/Aat/.zfs/snapshot/2017-10-03_20.00.04--5d/pool_z2_samba/shares/Aat@2017-10-03_20.00.04--5d:
256
Oct 9 13:22:57 zfs-cis kernel: [5368713.190105] WARNING: Unable to automount
/samba/shares/Trapianti/.zfs/snapshot/2017-10-03_10.00.03--5d/pool_z2_samba/shares/Trapianti@2017-10-03_10.00.03--5d:
256
Oct 9 13:22:57 zfs-cis kernel: [5368713.192847] WARNING: Unable to automount
/samba/shares/Trapianti/.zfs/snapshot/2017-10-03_10.00.03--5d/pool_z2_samba/shares/Trapianti@2017-10-03_10.00.03--5d:
256
Oct 9 13:22:57 zfs-cis kernel: [5368713.193617] WARNING: Unable to automount
/samba/shares/Trapianti/.zfs/snapshot/2017-10-03_14.00.04--5d/pool_z2_samba/shares/Trapianti@2017-10-03_14.00.04--5d:
256
Oct 9 13:22:57 zfs-cis kernel: [5368713.198096] WARNING: Unable to automount
/samba/shares/Trapianti/.zfs/snapshot/2017-10-03_14.00.04--5d/pool_z2_samba/shares/Trapianti@2017-10-03_14.00.04--5d:
256
in syslog :
Oct 9 12:22:12 zfs-cis systemd[1]: Got message type=method_call sender=n/a
destination=org.freedesktop.systemd1
object=/org/freedesktop/systemd1/unit/samba_2dshares_2dChtrapianti_2emount
interface=org.freedesktop.DBus.Properties member=GetAll cookie=155
reply_cookie=0 error=n/a
Oct 9 12:22:12 zfs-cis systemd[1]: Got message type=method_call sender=n/a
destination=org.freedesktop.systemd1
object=/org/freedesktop/systemd1/unit/samba_2dshares_2dLaboratorio_5fTrapianti_2emount
interface=org.freedesktop.DBus.Properties member=GetAll cookie=202
reply_cookie=0 error=n/a
Oct 9 12:22:12 zfs-cis systemd[1]: Got message type=method_call sender=n/a
destination=org.freedesktop.systemd1
object=/org/freedesktop/systemd1/unit/samba_2dshares_2dProgettoTrapianti_2emount
interface=org.freedesktop.DBus.Properties member=GetAll cookie=260
reply_cookie=0 error=n/a
Oct 9 12:22:12 zfs-cis systemd[1]: Got message type=method_call sender=n/a
destination=org.freedesktop.systemd1
object=/org/freedesktop/systemd1/unit/samba_2dshares_2dTrapianti_2emount
interface=org.freedesktop.DBus.Properties member=GetAll cookie=291
reply_cookie=0 error=n/a
Oct 9 12:22:13 zfs-cis systemd[1]: Got message type=method_call sender=n/a
destination=org.freedesktop.systemd1
object=/org/freedesktop/systemd1/unit/samba_2dshares_2dChtrapianti_2emount
interface=org.freedesktop.DBus.Properties member=GetAll cookie=155
reply_cookie=0 error=n/a
Oct 9 12:22:13 zfs-cis systemd[1]: Got message type=method_call sender=n/a
destination=org.freedesktop.systemd1
object=/org/freedesktop/systemd1/unit/samba_2dshares_2dLaboratorio_5fTrapianti_2emount
interface=org.freedesktop.DBus.Properties member=GetAll cookie=202
reply_cookie=0 error=n/a
Oct 9 12:22:13 zfs-cis systemd[1]: Got message type=method_call sender=n/a
destination=org.freedesktop.systemd1
object=/org/freedesktop/systemd1/unit/samba_2dshares_2dProgettoTrapianti_2emount
interface=org.freedesktop.DBus.Properties member=GetAll cookie=260
reply_cookie=0 error=n/a
Oct 9 12:22:13 zfs-cis systemd[1]: Got message type=method_call sender=n/a
destination=org.freedesktop.systemd1
object=/org/freedesktop/systemd1/unit/samba_2dshares_2dTrapianti_2emount
interface=org.freedesktop.DBus.Properties member=GetAll cookie=291
reply_cookie=0 error=n/a
Oct 9 12:22:14 zfs-cis systemd[1]: Got message type=method_call sender=n/a
destination=org.freedesktop.systemd1
object=/org/freedesktop/systemd1/unit/samba_2dshares_2dChtrapianti_2emount
interface=org.freedesktop.DBus.Properties member=GetAll cookie=155
reply_cookie=0 error=n/a
Oct 9 12:22:14 zfs-cis systemd[1]: Got message type=method_call sender=n/a
destination=org.freedesktop.systemd1
object=/org/freedesktop/systemd1/unit/samba_2dshares_2dLaboratorio_5fTrapianti_2emount
interface=org.freedesktop.DBus.Properties member=GetAll cookie=202
reply_cookie=0 error=n/a
Oct 9 12:22:14 zfs-cis systemd[1]: Got message type=method_call sender=n/a
destination=org.freedesktop.systemd1
object=/org/freedesktop/systemd1/unit/samba_2dshares_2dProgettoTrapianti_2emount
interface=org.freedesktop.DBus.Properties member=GetAll cookie=260
reply_cookie=0 error=n/a
Oct 9 12:22:14 zfs-cis systemd[1]: Got message type=method_call sender=n/a
destination=org.freedesktop.systemd1
object=/org/freedesktop/systemd1/unit/samba_2dshares_2dTrapianti_2emount
interface=org.freedesktop.DBus.Properties member=GetAll cookie=291
reply_cookie=0 error=n/a
Oct 9 12:22:14 zfs-cis systemd[1]: Got message type=method_call sender=n/a
destination=org.freedesktop.systemd1
object=/org/freedesktop/systemd1/unit/samba_2dshares_2dChtrapianti_2emount
interface=org.freedesktop.DBus.Properties member=GetAll cookie=155
reply_cookie=0 error=n/a
Oct 9 12:22:14 zfs-cis systemd[1]: Got message type=method_call sender=n/a
destination=org.freedesktop.systemd1
object=/org/freedesktop/systemd1/unit/samba_2dshares_2dLaboratorio_5fTrapianti_2emount
interface=org.freedesktop.DBus.Properties member=GetAll cookie=202
reply_cookie=0 error=n/a
Oct 9 12:22:14 zfs-cis systemd[1]: Got message type=method_call sender=n/a
destination=org.freedesktop.systemd1
object=/org/freedesktop/systemd1/unit/samba_2dshares_2dProgettoTrapianti_2emount
interface=org.freedesktop.DBus.Properties member=GetAll cookie=260
reply_cookie=0 error=n/a
Oct 9 12:22:14 zfs-cis systemd[1]: Got message type=method_call sender=n/a
destination=org.freedesktop.systemd1
object=/org/freedesktop/systemd1/unit/samba_2dshares_2dTrapianti_2emount
interface=org.freedesktop.DBus.Properties member=GetAll cookie=291
reply_cookie=0 error=n/a
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