** Changed in: zfs-linux (Ubuntu)
Status: In Progress => Fix Released
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Title:
Concurrent zfs create and rename operations
Does not trigger anymore with linux-image-4.4.0-16-generic 4.4.0-16.32 /
zfs.ko v0.6.5.6-0ubuntu1. zfsutils-linux and friends are still on
0.6.5.4-0ubuntu6.
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** Changed in: zfs-linux (Ubuntu)
Status: New => In Progress
** Changed in: zfs-linux (Ubuntu)
Importance: Undecided => High
** Changed in: zfs-linux (Ubuntu)
Assignee: (unassigned) => Colin Ian King (colin-king)
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Should be fixed with upstream version 0.6.5.6, so I guess this can be
closed once that version hits the archive.
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Title:
Concurrent
Another note: this can also be triggered only with rename operations on
zvols:
$ sudo zfs create -V 4096k pool1/zfsrename 1
$ sudo zfs create -V 4096k pool1/zfsrename 3
and then in two shells in parallel:
$ while : ; do echo "RENAME" `date`; sudo zfs rename pool1/testrename3
pool1/testrename4;
apport information
** Tags added: apport-collected xenial
** Description changed:
When doing "zfs create -V" and "zfs rename" operations on the same zpool
in parallel, there is a high chance for a deadlock leading to a complete
hang of the zpool in question (i.e., all further zfs
Stack traces of hanging processes collected via /proc//stack:
proc-1519-stack.log:
[] cv_wait_common+0x109/0x140 [spl]
[] __cv_wait_sig+0x15/0x20 [spl]
[] txg_quiesce_thread+0x3e1/0x3f0 [zfs]
[] thread_generic_wrapper+0x71/0x80 [spl]
[] kthread+0xd8/0xf0
[] ret_from_fork+0x3f/0x70
[]
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