Bug 530096 – ZFS hangs on destroy (FS with lots of xattr usage)

• Status: RESOLVED FIXED
• Product: Gentoo Linux

[Description Markus Hauschild 2014-11-22 04:24:38 UTC]

# zfs destroy tankZ/backup/test
hangs for a very long time, the filesystem has lots of xattr usage

top shows this process on top:
1053 root       0 -20       0      0      0 R 100.0  0.0  23:12.81 zfs_iput_taskq/

Reproducible: Always

Steps to Reproduce:
1. create ZFS filesystem
2. rsync a log of files with --fake-super (resulting in each file having xattr set)
3. detroy ZFS filesystem
Actual Results:  
sometimes it works, sometimes it hangs (destroying two such filesystems shortly after another is a good trigger)

Expected Results:  
no hangs

might be related to http://www.mattzone.com/zfsonlinux/zfsonlinux_20141009.html - conversation between jhc76 and ryao

[Comment 1 Markus Hauschild 2014-11-22 11:50:34 UTC]

Created attachment 390046 [details]
additional info (zpool status, zfs get all, top)

[Comment 2 Richard Yao (RETIRED) 2014-12-01 08:16:57 UTC]

This should be fixed in 0.6.3-r1.