Re: New ZFSv28 patchset for 8-STABLE: Kernel Panic

Hi

On 27 December 2010 16:04, jhell <jhell@xxxxxxxxxx> wrote:

1) Set vfs.zfs.recover=1 at the loader prompt (OK set vfs.zfs.recover=1)
2) Boot into single user mode without opensolaris.ko and zfs.ko loaded
3) ( mount -w / ) to make sure you can remove and also write new
zpool.cache as needed.
3) Remove /boot/zfs/zpool.cache
4) kldload both zfs and opensolaris i.e. ( kldload zfs ) should do the trick
5) verify that vfs.zfs.recover=1 is set then ( zpool import pool )
6) Give it a little bit monitor activity using Ctrl+T to see activity.

Ok..

I've got into the same situation again, no idea why this time.

I've followed your instructions, and sure enough I could do an import
of my pool again.

However, wanted to find out what was going on..
So I did:
zpool export pool

followed by zpool import

And guess what ... hanged zpool again.. can't Ctrl-C it, have to reboot..

So here we go again.
Rebooted as above.
zpool import pool -> ok

this time, I decided that maybe that what was screwing things up was the cache.
zpool remove pool ada1s2 -> ok
zpool status:
# zpool status
pool: pool
state: ONLINE
scan: scrub repaired 0 in 18h20m with 0 errors on Tue Dec 28 10:28:05 2010
config:

NAME STATE READ WRITE CKSUM
pool ONLINE 0 0 0
raidz1-0 ONLINE 0 0 0
ada2 ONLINE 0 0 0
ada3 ONLINE 0 0 0
ada4 ONLINE 0 0 0
ada5 ONLINE 0 0 0
ada6 ONLINE 0 0 0
ada7 ONLINE 0 0 0
logs
ada1s1 ONLINE 0 0 0

errors: No known data errors

# zpool export pool -> ok
# zpool import pool -> ok
# zpool add pool cache /dev/ada1s2 -> ok
# zpool status
pool: pool
state: ONLINE
scan: scrub repaired 0 in 18h20m with 0 errors on Tue Dec 28 10:28:05 2010
config:

NAME STATE READ WRITE CKSUM
pool ONLINE 0 0 0
raidz1-0 ONLINE 0 0 0
ada2 ONLINE 0 0 0
ada3 ONLINE 0 0 0
ada4 ONLINE 0 0 0
ada5 ONLINE 0 0 0
ada6 ONLINE 0 0 0
ada7 ONLINE 0 0 0
logs
ada1s1 ONLINE 0 0 0
cache
ada1s2 ONLINE 0 0 0

errors: No known data errors

# zpool export pool -> ok

# zpool import
load: 0.00 cmd: zpool 405 [spa_namespace_lock] 15.11r 0.00u 0.03s 0% 2556k
load: 0.00 cmd: zpool 405 [spa_namespace_lock] 15.94r 0.00u 0.03s 0% 2556k
load: 0.00 cmd: zpool 405 [spa_namespace_lock] 16.57r 0.00u 0.03s 0% 2556k
load: 0.00 cmd: zpool 405 [spa_namespace_lock] 16.95r 0.00u 0.03s 0% 2556k
load: 0.00 cmd: zpool 405 [spa_namespace_lock] 32.19r 0.00u 0.03s 0% 2556k
load: 0.00 cmd: zpool 405 [spa_namespace_lock] 32.72r 0.00u 0.03s 0% 2556k
load: 0.00 cmd: zpool 405 [spa_namespace_lock] 40.13r 0.00u 0.03s 0% 2556k

ah ah !
it's not the separate log that make zpool crash, it's the cache !

Having the cache in prevent from importing the pool again....

rebooting: same deal... can't access the pool any longer !

Hopefully this is enough hint for someone to track done the bug ...
_______________________________________________
freebsd-stable@xxxxxxxxxxx mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-stable
To unsubscribe, send any mail to "freebsd-stable-unsubscribe@xxxxxxxxxxx"

Relevant Pages

  • zfs zpool replace with partition fails only works with full disk
    ... Currently the pool is simply using the full drive on each of the 1TB. ... zpool replace pool2 ada6 gpt/pool.0 ... and then zpool status informs me it cannot open the device. ... errors: No known data errors ...
    (freebsd-stable)
  • Re: Bad news re: new (20080817) ZFS patches and send/recv (broken again)
    ... after today's batch of ZFS patches merged - all that remains is that I uncommented ps -axl from /usr/sbin/crashinfo, ... (Note that the "no such pool" in the FIRST script is normal; it simply tries to clean up something that isn't there, ... zpool export crashtestmaster ... echo Creating files and syncing ...
    (freebsd-current)
  • Re: zpool vdev vs. glabel
    ... your disk off before glabeling and adding it to your pool. ... I have created a raidz2 with disk I labeled with glabel before. ... zpool offline tank label/tank6 ...
    (freebsd-stable)
  • Re: New ZFSv28 patchset for 8-STABLE: Kernel Panic
    ... a live CD supporting zpool v28) ... Doing a zpool import actually made it show that the pool had ... So I run zpool import -f pool in openindiana, and luckily, all my ... option of rebooting. ...
    (freebsd-stable)
  • SUMMARY: WWN changed, ZFS confused
    ... Oracle got back to me not long after I'd posted this.. ... root@ host> zpool export iscsidevos ... What the zpool import command does is exam all disks labels for a pool name, ...
    (SunManagers)