kern/150544: Panic, when viewing the list of ZFS snapshots
Vladislav V. Prodan
universite at ukr.net
Mon Sep 13 22:10:01 UTC 2010
>Number: 150544
>Category: kern
>Synopsis: Panic, when viewing the list of ZFS snapshots
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Mon Sep 13 22:10:01 UTC 2010
>Closed-Date:
>Last-Modified:
>Originator: Vladislav V. Prodan
>Release: 9.0-CURRENT amd64
>Organization:
>Environment:
FreeBSD solo.XXXXX.biz 9.0-CURRENT FreeBSD 9.0-CURRENT #0: Tue Aug 24 15:52:21 EEST 2010 root at solo.XXXXX.biz:/usr/obj/usr/src/sys/solo.2 amd64
>Description:
FreeBSD 9.0-CURRENT #0: Tue Aug 24 15:52:21 EEST 2010 root
Kernel Version: 900017 (osreldate)
Hardware Platform: amd64
Processor Architecture: amd64
22:34 up 16 days, 7:01, 1 user, load averages: 0,00 0,00 0,00
------------------------------------------------------------------------
Physical Memory: 4075.01M
Page Size: 4096
Kernel Memory
TOTAL: 138.30M
DATA: 91.34% 126.33M
TEXT: 8.66% 11.97M
ARC Summary
Storage pool Version: 15 (spa)
Filesystem Version: 4 (zpl)
Memory Throttle Count: 0
ARC Misc:
Deleted: 2756856
Recycle Misses: 4968834
Mutex Misses: 10542
Evict Skips: 10542
ARC Size:
Current Size: 88.31% 141.30M (arcsize)
Target Size: (Adaptive) 91.87% 146.99M (c)
Min Size (Hard Limit): 19.51% 31.22M (c_min)
Max Size (High Water): ~5:1 160.00M (c_max)
ARC Size Breakdown:
Recently Used Cache Size: 93.72% 137.75M (p)
Frequently Used Cache Size: 6.28% 9.24M (c-p)
ARC Hash Breakdown:
Elements Max: 24257
Elements Current: 56.82% 13783
Collisions: 1388561
Chain Max: 5
Chains: 1467
ARC Efficiency:
Cache Access Total: 25347525
Cache Hit Ratio: 80.76% 20470182
Cache Miss Ratio: 19.24% 4877343
Actual Hit Ratio: 80.76% 20470182
Data Demand Efficiency: 84.62%
Data Prefetch Efficiency: DISABLED (zfs_prefetch_disable)
CACHE HITS BY CACHE LIST:
Anonymous: --% Counter Rolled.
Most Recently Used: 13.30% 2721548 (mru)
Most Frequently Used: 86.70% 17748634 (mfu)
Most Recently Used Ghost: 1.45% 295890 (mru_ghost)
Most Frequently Used Ghost: 11.09% 2269937 (mfu_ghost)
CACHE HITS BY DATA TYPE:
Demand Data: 49.03% 10036630
Prefetch Data: 0.00% 0
Demand Metadata: 50.97% 10433552
Prefetch Metadata: 0.00% 0
CACHE MISSES BY DATA TYPE:
Demand Data: 37.41% 1824523
Prefetch Data: 0.00% 0
Demand Metadata: 62.59% 3052820
Prefetch Metadata: 0.00% 0
L2 ARC Stats: (enabled with access > 0) 0
VDEV Cache Summary
Access Total: 3023322
Hits Ratio: 91.73% 2773221
Miss Ratio: 8.27% 250101
Delegations: 1638
ZFS Tunable (sysctl):
kern.maxusers=512
vfs.zfs.l2c_only_size=0
vfs.zfs.mfu_ghost_data_lsize=5889024
vfs.zfs.mfu_ghost_metadata_lsize=25750528
vfs.zfs.mfu_ghost_size=31639552
vfs.zfs.mfu_data_lsize=976896
vfs.zfs.mfu_metadata_lsize=17408
vfs.zfs.mfu_size=11664384
vfs.zfs.mru_ghost_data_lsize=6066688
vfs.zfs.mru_ghost_metadata_lsize=263168
vfs.zfs.mru_ghost_size=6329856
vfs.zfs.mru_data_lsize=1758720
vfs.zfs.mru_metadata_lsize=167936
vfs.zfs.mru_size=35749376
vfs.zfs.anon_data_lsize=0
vfs.zfs.anon_metadata_lsize=0
vfs.zfs.anon_size=950272
vfs.zfs.l2arc_norw=1
vfs.zfs.l2arc_feed_again=1
vfs.zfs.l2arc_noprefetch=0
vfs.zfs.l2arc_feed_min_ms=200
vfs.zfs.l2arc_feed_secs=1
vfs.zfs.l2arc_headroom=2
vfs.zfs.l2arc_write_boost=8388608
vfs.zfs.l2arc_write_max=8388608
vfs.zfs.arc_meta_limit=41943040
vfs.zfs.arc_meta_used=144496184
vfs.zfs.mdcomp_disable=0
vfs.zfs.arc_min=32735232
vfs.zfs.arc_max=167772160
vfs.zfs.zfetch.array_rd_sz=1048576
vfs.zfs.zfetch.block_cap=256
vfs.zfs.zfetch.min_sec_reap=2
vfs.zfs.zfetch.max_streams=8
vfs.zfs.prefetch_disable=1
vfs.zfs.check_hostid=1
vfs.zfs.recover=0
vfs.zfs.txg.write_limit_override=0
vfs.zfs.txg.synctime=5
vfs.zfs.txg.timeout=30
vfs.zfs.scrub_limit=10
vfs.zfs.vdev.cache.bshift=16
vfs.zfs.vdev.cache.size=10485760
vfs.zfs.vdev.cache.max=16384
vfs.zfs.vdev.aggregation_limit=131072
vfs.zfs.vdev.ramp_rate=2
vfs.zfs.vdev.time_shift=6
vfs.zfs.vdev.min_pending=4
vfs.zfs.vdev.max_pending=10
vfs.zfs.cache_flush_disable=0
vfs.zfs.zil_disable=0
vfs.zfs.zio.use_uma=0
vfs.zfs.version.zpl=4
vfs.zfs.version.spa=15
vfs.zfs.version.dmu_backup_stream=1
vfs.zfs.version.dmu_backup_header=2
vfs.zfs.version.acl=1
vfs.zfs.debug=0
vfs.zfs.super_owner=0
vm.kmem_size=1047527424
vm.kmem_size_scale=3
vm.kmem_size_min=0
vm.kmem_size_max=1047527424
[1:01]solo:root->/root# zfs list
NAME USED AVAIL REFER MOUNTPOINT
tank 10,8G 124G 601M legacy
tank/backup 6,73G 124G 6,73G /backup
tank/mysql 29,4M 124G 8,77M /var/db/mysql
tank/mysql/ibdata 10,0M 124G 10,0M /var/db/mysql/ibdata
tank/mysql/iblogs 10,2M 124G 10,0M /var/db/mysql/iblogs
tank/tmp 192K 124G 192K /tmp
tank/usr 2,51G 124G 1,64G /usr
tank/usr/home 20K 124G 20K /usr/home
tank/usr/ports 552M 124G 502M /usr/ports
tank/usr/ports/distfiles 49,8M 124G 49,8M /usr/ports/distfiles
tank/usr/src 336M 124G 336M /usr/src
tank/var 700M 124G 204K /var
tank/var/crash 21,5K 124G 21,5K /var/crash
tank/var/db 68,6M 124G 68,6M /var/db
tank/var/empty 20K 124G 20K /var/empty
tank/var/log 14,8M 124G 14,8M /var/log
tank/var/mail 72K 124G 72K /var/mail
tank/var/run 75,5K 124G 75,5K /var/run
tank/var/tmp 616M 124G 616M /var/tmp
tank/www 234M 124G 234M /www
>How-To-Repeat:
[0:50]solo:root->ftp/ncftp# zfs list -t snapshot
NAME USED AVAIL REFER MOUNTPOINT
tank/mysql at yesterday 214K - 8,81M -
tank/mysql at today 0 - 8,77M -
tank/mysql/ibdata at yesterday 0 - 10,0M -
tank/mysql/ibdata at today 0 - 10,0M -
tank/mysql/iblogs at yesterday 0 - 10,0M -
tank/mysql/iblogs at today 0 - 10,0M -
[0:50]solo:root->ftp/ncftp# cd /var/db/mysql
[0:50]solo:root->db/mysql# cd .zfs
[0:50]solo:root->mysql/.zfs# ll
And the panic ...
http://img835.imageshack.us/img835/1779/capture09142010005524.jpg
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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