Re: Snapshot feature problems with kernel 2.6.21.6

On Mon, 2007-07-23 at 11:30 -0700, Brock, Anthony - NET wrote:
> I've recently had to manually update my host kernel on a Debian testing
> system to 2.6.21.6. However, with the upgrade from 2.6.16.27 the
> snapshot feature with the stock Debian version of evms (2.5.5) isn't
> working properly:
> 
> 1. I create a snapshot.
> 2. I create the volume.
> 3. I successfully backup the data from the first volume.
> 4. I delete the volume
> 5. I attempt to delete the snapshot (fails).
> 
> However, I can't delete it (it returns a "Device or resource busy").
Me too.
Debian 2.6.18 stock (686) kernel.
I'm also at evms 2.5.5-22 in testing.

> I see the following in the log:
> 
> Jul 23 10:57:10 vs2.sterlingcgi.com _2_ BBR: BBR_InitTask:
> context->action is unknown or unsupported
I see BBR complaints too.  I originally created some of the objects with
an evms and kernel adopted for BBR; I have a feeling that feature may
have dropped our, or never been in, the stock kernels I'm not using.

However, the volume I am snapshotting is a fairly new object.  The
snapshot is on an old disk from an old system; my current root partition
is the one I'm snapshotting:

EVMS: Query: Objects, Plugin = Snapshot

Object Name: BackSnap
Major: 0
Minor: 0
Active: FALSE
Object Size: 480.00 MB

Object Name: lvm2/daisy/root#origin#
Major: 254
Minor: 12
Active: TRUE
Object Size: 480.00 MB

I can provide more debugging info if it would be helpful.  There are a
lot of other warnings, but they mostly relate to MS Windows file systems
that seemingly have nothing to do with my snapshot.  I recall
investigating these quite awhile ago, and being told the messages were
not signficant.

I also notice that in the scheduled transactions (when I use the GUI) I
see "reactivate /dev/evms/Root" at the end.  This seems odd, since I
never deactivated it.  It is the region being snapshotted.

Here's some chatter logcheck picked up:
Jul 26 20:21:14 corn kernel: ReiserFS: dm-72: found reiserfs format
"3.6" with standard journal
Jul 26 20:21:14 corn kernel: ReiserFS: dm-72: using ordered data mode
Jul 26 20:21:14 corn kernel: ReiserFS: dm-72: journal params: device
dm-72, size 8192, journal first block 18, max trans len 1024, max batch
900, max commit age 30, max trans age 30
Jul 26 20:21:14 corn kernel: ReiserFS: dm-72: checking transaction log
(dm-72)
Jul 26 20:21:15 corn kernel: ReiserFS: dm-72: Using r5 hash to sort
names
Jul 26 20:21:15 corn kernel: ReiserFS: dm-72: Removing [15336 13558 0x0
SD]..done
Jul 26 20:21:15 corn kernel: ReiserFS: dm-72: Removing [15336 13376 0x0
SD]..done
Jul 26 20:21:15 corn kernel: ReiserFS: dm-72: Removing [15338 13328 0x0
SD]..done
Jul 26 20:21:15 corn kernel: ReiserFS: dm-72: Removing [15338 13324 0x0
SD]..done
Jul 26 20:21:15 corn kernel: ReiserFS: dm-72: Removing [15336 13154 0x0
SD]..done
Jul 26 20:21:15 corn kernel: ReiserFS: dm-72: Removing [15336 13069 0x0
SD]..done
Jul 26 20:21:15 corn kernel: ReiserFS: dm-72: Removing [15336 13018 0x0
SD]..done
Jul 26 20:21:15 corn kernel: ReiserFS: dm-72: Removing [15336 12985 0x0
SD]..done
Jul 26 20:21:15 corn kernel: ReiserFS: dm-72: Removing [15336 12954 0x0
SD]..done
Jul 26 20:21:15 corn kernel: ReiserFS: dm-72: Removing [15336 12952 0x0
SD]..done
Jul 26 20:21:15 corn kernel: ReiserFS: dm-72: Removing [15336 12930 0x0
SD]..done
Jul 26 20:21:15 corn kernel: ReiserFS: dm-72: Removing [15336 12926 0x0
SD]..done
Jul 26 20:21:15 corn kernel: ReiserFS: dm-72: Removing [15336 12870 0x0
SD]..done
Jul 26 20:21:15 corn kernel: ReiserFS: dm-72: Removing [15336 12709 0x0
SD]..done
Jul 26 20:21:15 corn kernel: ReiserFS: dm-72: Removing [15336 12640 0x0
SD]..done
Jul 26 20:21:15 corn kernel: ReiserFS: dm-72: Removing [15336 10511 0x0
SD]..done
Jul 26 20:21:15 corn kernel: ReiserFS: dm-72: Removing [15336 10111 0x0
SD]..done
Jul 26 20:21:15 corn kernel: ReiserFS: dm-72: Removing [15336 9982 0x0
SD]..done
Jul 26 20:21:15 corn kernel: ReiserFS: dm-72: Removing [15336 9810 0x0
SD]..done
Jul 26 20:21:15 corn kernel: ReiserFS: dm-72: Removing [15336 6745 0x0
SD]..done
Jul 26 20:21:15 corn kernel: ReiserFS: dm-72: Removing [15336 3675 0x0
SD]..done
Jul 26 20:21:15 corn kernel: ReiserFS: dm-72: Removing [26 226 0x0
SD]..done
Jul 26 20:21:15 corn kernel: ReiserFS: dm-72: Removing [26 225 0x0
SD]..done
Jul 26 20:21:15 corn kernel: ReiserFS: dm-72: Removing [26 224 0x0
SD]..done
Jul 26 20:21:15 corn kernel: ReiserFS: dm-72: Removing [26 222 0x0
SD]..done
Jul 26 20:21:15 corn kernel: ReiserFS: dm-72: Removing [26 218 0x0
SD]..done
Jul 26 20:21:15 corn kernel: ReiserFS: dm-72: There were 26 uncompleted
unlinks/truncates. Completed
Jul 26 20:22:14 corn kernel: device-mapper: ioctl: unable to remove open
device Root
Jul 26 20:41:19 corn kernel: device-mapper: ioctl: unable to remove open
device Root
Jul 26 20:48:47 corn kernel: device-mapper: ioctl: unable to remove open
device Root
Jul 26 20:54:53 corn kernel: device-mapper: ioctl: unable to remove open
device Root
Jul 26 20:59:49 corn kernel: device-mapper: ioctl: unable to remove open
device Root


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