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Date:      Fri, 06 Dec 2002 17:28:28 -0800
From:      Kirk McKusick <mckusick@beastie.mckusick.com>
To:        Archie Cobbs <archie@dellroad.org>
Cc:        Julian Elischer <julian@elischer.org>, freebsd-current@FreeBSD.ORG, Thomas-Henning von Kamptz <tomsoft@FreeBSD.ORG>
Subject:   Re: backgroud fsck is still locking up system (fwd) 
Message-ID:  <200212070128.gB71SS59094239@beastie.mckusick.com>
In-Reply-To: Your message of "Fri, 06 Dec 2002 14:52:24 PST." <200212062252.gB6MqOhB066505@arch20m.dellroad.org> 

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I suggest that we drag Thomas-Henning von Kamptz into this
discussion as he was one of the main authors of growfs. He
is copied on my reply.

	Kirk McKusick

=-=-=-=-=-=

From: Archie Cobbs <archie@dellroad.org>
Subject: Re: backgroud fsck is still locking up system (fwd)
In-Reply-To: <Pine.BSF.4.21.0212061119170.45984-100000@InterJet.elischer.org>
To: Julian Elischer <julian@elischer.org>
Date: Fri, 6 Dec 2002 14:52:24 -0800 (PST)
CC: mckusick@beastie.mckusick.com, freebsd-current@FreeBSD.ORG
X-ASK-Info: Whitelist match

Julian Elischer wrote:
> most systems follow / with their swap region..
> 
> you can boot from fixit, or picoBSD floppy 
> and use disklabel -e to exend the root partition
> then you can use growfs to add the new space to your root fs.

Hmm.. I tried that and it didn't seem to work.

The disklabel change was successful, but growfs didn't seem to
expand the root partition any.. df(1) still shows it as 50M.

I ran growfs after booting single user mode but before mounting
any disks.. perhaps that caused it to not work.

Since that didn't work, I booted a 4.7-REL fixit floppy and tried
to run growfs from there, but then that growfs core dumped:

    Program terminated with signal 11, Segmentation fault.
    #0  0x804c089 in updclst (block=-874) at growfs.c:2335
    2335            setbit(cg_clustersfree(&acg), block);
    (gdb) list
    2330                    return;
    2331            }
    2332            /*
    2333             * update cluster allocation map
    2334             */
    2335            setbit(cg_clustersfree(&acg), block);
    2336
    (gdb) where
    #0  0x804c089 in updclst (block=-874) at growfs.c:2335
    #1  0x8049584 in updjcg (cylno=2, utime=1039185218, fsi=4, fso=3, Nflag=0)
	at growfs.c:862
    #2  0x8048280 in growfs (fsi=4, fso=3, Nflag=0) at growfs.c:219
    #3  0x804beb2 in main (argc=2, argv=0xbfbff7a4) at growfs.c:2213
    #4  0x8048135 in _start ()

Notice "block=-874" which indicates something is weird or corrupted.

So now I've got extra space in the partition which (apparently) is
not being used and I can't seem to get at it (see below).

Plus I have a sneaking suspicion that I've screwed up something,
but there's nothing in the growfs man page that indicates what I
did was wrong.

FYI, this is a test machine so it's OK if it gets hosed.

-Archie

__________________________________________________________________________
Archie Cobbs     *     Packet Design     *     http://www.packetdesign.com

$ disklabel ad0s1
# /dev/ad0s1c:
type: ESDI
disk: ad0s1
label: 
flags:
bytes/sector: 512
sectors/track: 63
tracks/cylinder: 255
sectors/cylinder: 16065
cylinders: 1860
sectors/unit: 29896902
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]
  a:   204800        0    4.2BSD     1024  8192 32768 	# (Cyl.    0 - 12*)
  b:   164608   204800      swap                    	# (Cyl.   12*- 22*)
  c: 29896902        0    unused        0     0       	# (Cyl.    0 - 1860*)
  e:    40960   369408    4.2BSD     1024  8192    16 	# (Cyl.   22*- 25*)
  f: 29486534   410368    4.2BSD     1024  8192    16 	# (Cyl.   25*- 1860*)
$ df
Filesystem             1K-blocks    Used    Avail Capacity  Mounted on
/dev/ad0s1a                49583   36751     8866    81%    /
devfs                          1       1        0   100%    /dev
/dev/ad0s1f             14289643 2794938 10351534    21%    /usr
/dev/ad0s1e                19815    3555    14675    20%    /var
procfs                         4       4        0   100%    /proc


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