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DescriptionCorey Marthaler
2011-09-23 15:20:58 UTC
Description of problem:
I've seen this error on the latest rpms while running splitmirrors test cases. The cases don't actually fail, they just report these errors.
SCENARIO - [attempt_split_using_existing_split_name]
Create a 3-way mirror and attempt to split off from it twice using the same new name
taft-01: lvcreate -m 3 -n split_same_name -L 300M split_image
Waiting until all mirrors become fully syncd...
0/1 mirror(s) are fully synced: ( 91.17% )
1/1 mirror(s) are fully synced: ( 100.00% )
first image split...
taft-01: lvconvert --splitmirrors 1 --name new split_image/split_same_name
Although the mirror removal passed, errors were found in it's output
Logical volume split_same_name converted.
Internal error: Maps lock 17768448 < unlock 17866752
attempt second image split using same name...
Deactivating mirror new... and removing
Deactivating mirror split_same_name... and removing
SCENARIO - [split_nosync_mirror]
Create a 3-way nosync mirror and split it
taft-01: lvcreate --nosync -m 2 -n split_nosync -L 300M split_image
WARNING: New mirror won't be synchronised. Don't read what you didn't write!
Waiting until all mirrors become fully syncd...
1/1 mirror(s) are fully synced: ( 100.00% )
splitting off leg from nosync...
Although the mirror removal passed, errors were found in it's output
Logical volume split_nosync converted.
Internal error: Maps lock 17772544 < unlock 17887232
Version-Release number of selected component (if applicable):
2.6.32-198.el6.x86_64
lvm2-2.02.87-3.el6 BUILT: Wed Sep 21 09:54:55 CDT 2011
lvm2-libs-2.02.87-3.el6 BUILT: Wed Sep 21 09:54:55 CDT 2011
lvm2-cluster-2.02.87-3.el6 BUILT: Wed Sep 21 09:54:55 CDT 2011
udev-147-2.38.el6 BUILT: Fri Sep 9 16:25:50 CDT 2011
device-mapper-1.02.66-3.el6 BUILT: Wed Sep 21 09:54:55 CDT 2011
device-mapper-libs-1.02.66-3.el6 BUILT: Wed Sep 21 09:54:55 CDT 2011
device-mapper-event-1.02.66-3.el6 BUILT: Wed Sep 21 09:54:55 CDT 2011
device-mapper-event-libs-1.02.66-3.el6 BUILT: Wed Sep 21 09:54:55 CDT 2011
cmirror-2.02.87-3.el6 BUILT: Wed Sep 21 09:54:55 CDT 2011
How reproducible:
It's been seen a few times.
I tried to reproduce with a simple program provided by Zdenek (it should reveal the problem in mlock/munlock inconsistency), but it seems to be fine (tried on latest 6.2 kernel 2.6.32-220.2.1.el6.x86_64 as well as the one reported here 2.6.32-198.el6.x86_64). I'm setting cond nak reproducer for now.