Hi XFS team,
* This is completed in 1sec. Very quick and give me the result in the test.d864 file $ls /srv/node/d864/tmp > test.d864
* This is hanging $ls /srv/node/d864/tmp
We encountered a problem frequently in past three weeks. Our daemons store data to XFS partition associate with xattr.
Disk seems not responding since all processes to this disk in D state and can't be killed at all.
- It happens on several disks. I feel it's randomly.
- Reboot seems solve the problem temporarily.
- All disks are multipath devices.
I suspected that's an issue from disk corrupted at beginning. But smartctl doesn't show any clue about disk bad. And reboot makes the problem gone away.
- Any process to this disk is blocked. Even a simple $ls . Kernel log
- I tested the disk by read bytes on block via $dd . It works fine without any error in dmesg.
- The `xfs_repair -n` output of a problematic mount point [xfs_repair -n] . It is still processing.
- Kernel : Linux node9 2.6.32-573.8.1.el6.x86_64 #1 SMP Tue Nov 10 18:01:38 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
- OS : CentOS release 6.5 (Final)
- XFS : xfsprogs.x86_64 3.1.1-14.el6
There's an interesting behaviour of $ls command.
* This is hanging $ls /srv/node/d864/tmp
I suspect there's something wrong with imap. Is there a known bug ?
Thanks // Hugo
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