[linux-lvm] Snapshot creating problem

[Barry, Christopher]

Not sure if this has something to do with it, but right about the time I was creating the lv's and snapshot, this was getting spewed into /var/log/messages:
Mar 17 12:09:57 debian kernel: invalidate: busy buffer
Mar 17 12:10:00 debian last message repeated 66 times
Mar 17 12:11:30 debian last message repeated 134 times
Mar 17 12:14:53 debian kernel: invalidate: busy buffer
Mar 17 12:15:56 debian last message repeated 268 times
Mar 17 12:16:54 debian last message repeated 267 times
Mar 17 12:26:08 debian kernel: invalidate: busy buffer
Mar 17 12:27:21 debian last message repeated 536 times
Mar 17 12:27:31 debian last message repeated 200 times
Mar 17 12:34:05 debian kernel: invalidate: busy buffer
Mar 17 12:34:26 debian last message repeated 535 times
Mar 17 12:40:44 debian kernel: XFS mounting filesystem device-mapper(254,0)
Mar 17 12:46:09 debian kernel: invalidate: busy buffer
Mar 17 12:46:09 debian last message repeated 66 times
Mar 17 12:47:15 debian last message repeated 402 times
Mar 17 12:47:16 debian kernel: device-mapper: internal error adding target to table
Mar 17 12:51:40 debian kernel: invalidate: busy buffer
Mar 17 12:52:11 debian last message repeated 134 times
Mar 17 12:53:26 debian last message repeated 201 times
Mar 17 12:53:33 debian last message repeated 401 times
Mar 17 12:53:34 debian kernel: device-mapper: internal error adding target to table
Mar 17 12:53:59 debian kernel: invalidate: busy buffer
Mar 17 12:54:24 debian last message repeated 535 times
Mar 17 12:54:24 debian kernel: device-mapper: internal error adding target to table
Mar 17 13:02:11 debian kernel: invalidate: busy buffer
Mar 17 13:02:34 debian last message repeated 535 times


That busy buffer error on google seems realated to LVM.

To give you more info I need some instructions on how to get you the debug output.

Thanks,



--
Christopher Barry
Manager of Information Systems
InfiniCon Systems
http://www.infiniconsys.com

-----Original Message-----
From: Alasdair G Kergon [mailto:agk at uk.sistina.com]
Sent: Monday, March 17, 2003 1:46 PM
To: linux-lvm at sistina.com
Subject: Re: [linux-lvm] Snapshot creating problem


On Mon, Mar 17, 2003 at 01:20:55PM -0500, Barry, Christopher wrote:
> Any ideas of what I'm doing wrong? An lvs shows it there, but it does not seem to appear in /dev/vg0/ and I cannot mount it.

You don't say what version you are using: see if you can reproduce
the problem using the current CVS LVM2 version.

Look in kernel message log for a (slightly) better error message.

Turn on debugging output (log to file) and see if the last set(s) 
of 'Adding target' lines before you got the error make sense.  

Assuming the problem is still present in CVS, if you'd like me
to look into it, I need a copy of the complete debugging output
and to know exactly which device-mapper patches you applied to 
your kernel.

Alasdair
-- 
agk at uk.sistina.com

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