Re: nilfs2 weird issue - snapshots are gone, cleanerd not running

[Piotr Szymaniak <szarpaj-TbOm9Ca2r9GrDJvtcaxF/A@public.gmane.org>]

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On Mon, Jul 09, 2012 at 11:33:13AM +0200, dexen deVries wrote:
> On Monday 09 of July 2012 09:33:00 you wrote:
> >(...)
> > Where to go from this point? How to debug nilfs_cleanerd issue?
> 
> using strace -f  on the nilfs_cleanerd should give you a clue what causes the 
> exit. it may exit if can't connect to syslogd.

Hi list,

I will try to sort information from few messages together here.

Attached strace output from my "nilfs_cleanerd" for rootfs. The script
is in /etc/local.d (again, Gentoo Linux) and it looks like this (removed
commented parts and empty lines):
CONFILE="/etc/nilfs_cleanerd_rootfs.conf"
TARGETDISK="/dev/disk/by-uuid/1aa9e6fb-cf7d-45bd-bbfb-08110a8840b7"
/sbin/nilfs_cleanerd -c "${CONFILE}" "${TARGETDISK}"

And here's the mentioned nilfs_cleanerd_rootfs.conf:
protection_period	3600
min_clean_segments	13%
max_clean_segments	25%
clean_check_interval	10
selection_policy	timestamp	# timestamp in ascend order
nsegments_per_clean	2
mc_nsegments_per_clean	4
cleaning_interval	5
mc_cleaning_interval	1
retry_interval		60
use_mmap
log_priority		info


> if `lscp' reports no checkpoints, try `lscp -a' -- should show even minor 
> checkpoints (which are checkpoints created by GC, AFAIK).

That's right, lscp -a gives some more output:
maszyn ~ # lscp -a | wc -l
1428

Running nilfs_cleanerd with more verbose output (log_priority debug)
gives me this:
Jul 10 09:45:26 [nilfs_cleanerd] start
Jul 10 09:45:26 [nilfs_cleanerd] cannot open nilfs on /dev/sda2: No such
file or directory
Jul 10 09:45:26 [nilfs_cleanerd] cannot create cleanerd on /dev/sda2: No
such file or directory
Jul 10 09:45:26 [nilfs_cleanerd] shutdown


maszyn ~ # ll /dev/sda2
brw-rw---- 1 root disk 8, 2 lip 10  2012 /dev/sda2

maszyn ~ # ll /dev/disk/by-uuid/1aa9e6fb-cf7d-45bd-bbfb-08110a8840b7 
lrwxrwxrwx 1 root root 10 lip 10  2012
/dev/disk/by-uuid/1aa9e6fb-cf7d-45bd-bbfb-08110a8840b7 -> ../../sda2


Piotr Szymaniak.
-- 
Gdy mowisz, co bedzie w przyszlym roku, diabel chichocze.
  -- Przyslowie japonskie

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