EXT4-fs: Unaligned AIO/DIO on inode xx by sanlock; performance will be poor.

Bart Verwilst lists at verwilst.be
Wed Aug 22 19:22:07 UTC 2012


True. But i'm not using sanlock on ext4. :)

/var/log/syslog:Aug 22 09:56:50 vm03-test kernel: [43429.050495] 
EXT4-fs (sda1): Unaligned AIO/DIO on inode 5246167 by sanlock; 
performance will be poor.
/var/log/syslog:Aug 22 14:28:25 vm03-test kernel: [  220.825868] 
EXT4-fs (sda1): Unaligned AIO/DIO on inode 5246167 by sanlock; 
performance will be poor.
/var/log/syslog:Aug 22 14:44:50 vm03-test kernel: [  220.889358] 
EXT4-fs (sda1): Unaligned AIO/DIO on inode 5246167 by sanlock; 
performance will be poor.
/var/log/syslog:Aug 22 14:56:12 vm03-test kernel: [  223.306754] 
EXT4-fs (sda1): Unaligned AIO/DIO on inode 5246167 by sanlock; 
performance will be poor.
/var/log/syslog:Aug 22 20:56:29 vm03-test kernel: [21827.583758] 
EXT4-fs (sda1): Unaligned AIO/DIO on inode 5246167 by sanlock; 
performance will be poor.

# mount
/dev/sda1 on / type ext4 (rw,errors=remount-ro)
/dev/mapper/iscsi_cluster_qemu on /etc/libvirt/qemu type gfs2 
(rw,relatime,hostdata=jid=2)
/dev/mapper/iscsi_cluster_sanlock on /var/lib/libvirt/sanlock type gfs2 
(rw,relatime,hostdata=jid=2)


# cat /etc/libvirt/qemu-sanlock.conf | grep -v ^#

auto_disk_leases = 1

disk_lease_dir = "/var/lib/libvirt/sanlock"

host_id = 3


Kind regards,

Bart

David Teigland schreef op 22.08.2012 18:16:
> On Sun, Aug 19, 2012 at 11:48:53AM +0200, Bart Verwilst wrote:
>> Hi list,
>>
>> I'm seeing this on one of my nodes. Reading
>> http://askubuntu.com/questions/118140/unaligned-aio-dio, i decided
>> to ask here to see if this is a bug or sth on my end. Using sanlock
>> 2.2.
>>
>> [237829.026847] EXT4-fs (sda1): Unaligned AIO/DIO on inode 5246167
>> by sanlock; performance will be poor.
>
> There's not much point in using sanlock on ext4 in the first place 
> since
> it's not a shared fs.



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