I have an 82GB UFS image file (ufs-snapshot) mounted on some directory
ufs-snapshot.mount. (mount /dev/`mdconfig -a -t vnode -f ufs-snapshot`
ufs-snapshot.mount)
Command 'cp -R ufs-snapshot.mount/usr other-dir/' hanged in the middle
with DL+ status:
$ ps ax | grep cp
73635 10 DL+ 0:12.19 cp -R ufs-snapshot.mount/usr other-dir/
'top' shows it in vnread state:
73635 root 1 20 0 10084K 2672K vnread 1 0:12 0.00% cp
When I ran 'ls' in the same mounted directory it hanged too with D+ status:
$ ps ax | grep ls
75882 2 D+ 0:00.00 ls ufs-snapshot.mount/
What is happening? Why cp and ls hanged?
I think, cp -R hanged first and later ls is waiting on some op initiated
by cp -R.
Somehow, cp -R managed to hang itself.
How can I find out what cp is waiting on?
9.0-STABLE amd64
Yuri
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