Taken from
http://www.ussg.iu.edu/hypermail/linux/kernel/0405.3/0669.html:
> > The idea here is
> > that a filesystem can tag an IO request as a barrier and the disk
will not
> > reorder writes across the barrier. It provides additional integrity
> > guarantees for the journalling filesystems. The feature is enabled
for
> > reiserfs and ext3.

What you are seeing is an informative message, not an error.  Don't
worry about it.


Mark Post

-----Original Message-----
From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of
Bernard Wu
Sent: Thursday, June 30, 2005 10:20 AM
To: [email protected]
Subject: DMESG output


Hi Listserv,
Can anyone tell me why I am getting these messages, what they mean and
how to get rid of them :

JBD: barrier-based sync failed on dm-5 - disabling barriers
JBD: barrier-based sync failed on dm-2 - disabling barriers
out of order segment: rcv_next 8EE939AE seq 8EE939C7 - 8EE939C8 ofo
requeuing : rcv_next 8EE939C7 seq 8EE939C7 - 8EE939C8 out of order
segment: rcv_next 9051F084 seq 9051F09D - 9051F09E ofo requeuing :
rcv_next 9051F09D seq 9051F09D - 9051F09E out of order segment: rcv_next
90556FBF seq 90557087 - 90557088 ofo requeuing : rcv_next 90557087 seq
90557087 - 90557088

TIA
Bernie Wu
[EMAIL PROTECTED]

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