Date: Mon, 5 Dec 2005 21:08:03 GMT From: fbsd user <freebsd-fs@FreeBSD.org> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/89991: softupdates with mount -ur causes fs UNREFS Message-ID: <200512052108.jB5L83D2081607@www.freebsd.org> Resent-Message-ID: <200512052110.jB5LA2DB022958@freefall.freebsd.org>
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>Number: 89991
>Category: kern
>Synopsis: softupdates with mount -ur causes fs UNREFS
>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 Dec 05 21:10:02 GMT 2005
>Closed-Date:
>Last-Modified:
>Originator: fbsd user
>Release: RELENG_4 20051028
>Organization:
>Environment:
FreeBSD 4.11-STABLE #0: Fri Oct 28 00:24:59 EDT 2005 i386
>Description:
cd /
fsck -fy /.../<some_mountpoint>
[passes check with no issues]
dd if=/dev/urandom of=/.../<some_mountpoint>/blah bs=1m count=1
fstat -f /.../<some_mountpoint>
[nothing listed, ever, it's bulk storage]
sync ; sync ; sync ; sync ; sync ; sync ;
sleep 60
sync ; sync ; sync ; sync ; sync ; sync ;
# done back to back immediately with no wait exactly as shown
rm /.../<some_mountpoint>/blah ; mount -uvr /.../<some_mountpoint>
sync ; sync ; sync ; sync ; sync ; sync ;
sleep 60
sync ; sync ; sync ; sync ; sync ; sync ;
fsck -fy /.../<some_mountpoint>
** Phase 4 - Check Reference Counts
UNREF FILE I=395362 OWNER=foo MODE=100644
SIZE=1048576 MTIME=Dec 5 14:59 2005
CLEAR? yes
** Phase 5 - Check Cyl groups
FREE BLK COUNT(S) WRONG IN SUPERBLK
SALVAGE? yes
SUMMARY INFORMATION BAD
SALVAGE? yes
BLK(S) MISSING IN BIT MAPS
SALVAGE? yes
42491 files, 1643698 used, 1066635 free (2707 frags, 132991 blocks, 0.1% fragmentation)
***** FILE SYSTEM WAS MODIFIED *****
fsck -fy /.../<some_mountpoint>
[passes check with no issues]
=======================================================================
INFO...
dumpfs /.../<some_mountpoint> | head -22
magic 11954 time Mon Dec 5 15:01:17 2005
id [ 43667f05 32b73fdf ]
cylgrp dynamic inodes 4.4BSD
nbfree 132991 ndir 1648 nifree 636035 nffree 2707
ncg 31 ncyl 2689 size 2753246 blocks 2710333
bsize 16384 shift 14 mask 0xffffc000
fsize 2048 shift 11 mask 0xfffff800
frag 8 shift 3 fsbtodb 2
cpg 89 bpg 11392 fpg 91136 ipg 21888
minfree 8% optim time maxcontig 7 maxbpg 4096
rotdelay 0ms rps 60
ntrak 1 nsect 4096 npsect 4096 spc 4096
symlinklen 60 trackskew 0 interleave 1 contigsumsize 7
nindir 4096 inopb 128 nspf 4 maxfilesize 1126174852055039
sblkno 8 cblkno 16 iblkno 24 dblkno 1392
sbsize 2048 cgsize 16384 cgoffset 1024 cgmask 0xffffffff
csaddr 1392 cssize 2048 shift 10 mask 0xfffffc00
cgrotor 1 fmod 0 ronly 0 clean 1
avgfpdir 64 avgfilesize 16384
flags soft-updates
(no rotational position table)
df -ik /.../<some_mountpoint>
Filesystem 1K-blocks Used Avail Capacity iused ifree %iused Mounted on
/dev/ad1h 5420666 3287396 1699618 66% 42491 636035 6% /.../<some_mountpoint>
disklabel -r /dev/ad1h
# /dev/ad1c:
type: unknown
disk: amnesiac
label:
flags:
bytes/sector: 512
sectors/track: 63
tracks/cylinder: 16
sectors/cylinder: 1008
cylinders: 19767
sectors/unit: 19925880
rpm: 3600
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0 # milliseconds
track-to-track seek: 0 # milliseconds
drivedata: 0
8 partitions:
# size offset fstype [fsize bsize bps/cpg]
c: 19925880 0 unused 0 0 # (Cyl. 0 - 19767*)
f: 6291456 0 4.2BSD 2048 16384 89 # (Cyl. 0 - 6241*)
g: 2621440 6291456 4.2BSD 2048 16384 91 # (Cyl. 6241*- 8842*)
h: 11012984 8912896 4.2BSD 2048 16384 89 # (Cyl. 8842*- 19767*)
dmesg -a | egrep ad1
ad1: success setting UDMA2 on Intel chip
ad1: <ST310210A/3.12> ATA-4 disk at ata0-slave
ad1: 9729MB (19925880 sectors), 19767 C, 16 H, 63 S, 512 B
ad1: 16 secs/int, 1 depth queue, UDMA33
ad1: piomode=4 dmamode=2 udmamode=4 cblid=1
newfs -N -U /dev/ad1h
Warning: Block size and bytes per inode restrict cylinders per group to 89.
Warning: 1160 sector(s) in last cylinder unallocated
/dev/ad1h: 11012984 sectors in 2689 cylinders of 1 tracks, 4096 sectors
5377.4MB in 31 cyl groups (89 c/g, 178.00MB/g, 21888 i/g) SOFTUPDATES
super-block backups (for fsck -b #) at:
32, 364576, 729120, ...
tunefs -p /dev/ad1h
tunefs: soft updates: (-n) enabled
tunefs: maximum contiguous block count: (-a) 7
tunefs: rotational delay between contiguous blocks: (-d) 0 ms
tunefs: maximum blocks per file in a cylinder group: (-e) 4096
tunefs: average file size: (-f) 16384
tunefs: average number of files in a directory: (-s) 64
tunefs: minimum percentage of free space: (-m) 8%
tunefs: optimization preference: (-o) time
fdisk ad1
******* Working on device /dev/ad1 *******
parameters extracted from in-core disklabel are:
cylinders=19767 heads=16 sectors/track=63 (1008 blks/cyl)
Figures below won't work with BIOS for partitions not in cyl 1
parameters to be used for BIOS calculations are:
cylinders=19767 heads=16 sectors/track=63 (1008 blks/cyl)
fdisk: invalid fdisk partition table found
Media sector size is 512
Warning: BIOS sector numbering starts with sector 1
Information from DOS bootblock is:
The data for partition 1 is:
<UNUSED>
The data for partition 2 is:
<UNUSED>
The data for partition 3 is:
<UNUSED>
The data for partition 4 is:
sysid 165,(FreeBSD/NetBSD/386BSD)
start 63, size 19925073 (9729 Meg), flag 80 (active)
beg: cyl 0/ head 1/ sector 1;
end: cyl 310/ head 15/ sector 63
ffsinfo /dev/ad1h
[skipped]
in kernel but not being used.
options QUOTA
occurs with multiple filesystems here, different machines, same kernel/world.
>How-To-Repeat:
repeat the above.
>Fix:
flush buffers before remounting read-only?
test/verify the following...
affects plain/forced mount/umount?
affects RELENG_4/5/6/HEAD?
UFS1 vs. UFS2, etc?
without softupdates?
will update this pr as/if answers to the above
become known.
>Release-Note:
>Audit-Trail:
>Unformatted:
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