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Date:      Wed, 26 Apr 2006 17:03:35 +0200
From:      Fabian Keil <freebsd-listen@fabiankeil.de>
To:        Daichi GOTO <daichi@freebsd.org>
Cc:        freebsd-fs@freebsd.org, freebsd-hackers@freebsd.org, freebsd-current@freebsd.org, ozawa@ongs.co.jp, Kris Kennaway <kris@obsecurity.org>
Subject:   Re: [ANN] unionfs patchset-11 release
Message-ID:  <20060426170335.40e95f36@localhost>
In-Reply-To: <444F8006.6010609@freebsd.org>
References:  <E1F5gbI-000Eea-B7@cs1.cs.huji.ac.il> <43E5D052.3020207@freebsd.org> <43E656C7.8040302@freesbie.org> <43E6D5C8.4050405@freebsd.org> <43E71485.5040901@freesbie.org> <43E73330.8070101@freebsd.org> <43EB4C00.2030101@freebsd.org> <4417DD8D.3050201@freebsd.org> <4433CA53.5050000@freebsd.org> <444E13BA.8050902@freebsd.org> <20060425175553.GA56011@xor.obsecurity.org> <444F663D.9060905@freebsd.org> <20060426151557.3a46dfbd@localhost> <444F8006.6010609@freebsd.org>

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Daichi GOTO <daichi@freebsd.org> wrote:

> Fabian Keil wrote:
> > Looks like the attachment was filtered.
> >=20
> > I got a different panic on
> > FreeBSD TP51.local 6.1-RC FreeBSD 6.1-RC #22: Wed Apr 26 13:25:57 CEST =
2006
> > after mounting an empty directory above /usr/src,
> > applying a patch and using find's -type f option shortly afterwards
> > to show the files in the directory on top:=20
>=20
> Muuuu...
>=20
> We tried as follow, but we could not get the same error :(
> It looks very fine.
>=20
> # cd /usr/
> # mkdir hoge
> # mount_unionfs -c transparent -o noatime /usr/hoge /usr/src
> # cd src
> # find . -type f &; find . -type f &; find . -type f &
> # cd /usr/
> # umount /usr/src
> # rm -r hoge
> # mkdir hoge
> # mount_unionfs -c transparent /usr/hoge /usr/src
> # cd src
> # find . -type f &; find . -type f &; find . -type f &
>=20
> What do you make of it?

I didn't give you enough information, sorry.

What I'm doing is:

fk@TP51 ~ $mkdir /tmp/unionfs-src/
fk@TP51 ~ $mount_unionfs /tmp/unionfs-src /usr/src
fk@TP51 ~ $cd /usr/src
fk@TP51 /usr/src $patch -p1 < ~/test/combi.patch
fk@TP51 /usr/src $find /tmp/unionfs-src/ -type f
[Panic]

~/test/combi.patch changes about twenty files.

I'm not sure if it's important, but /usr was mounted
readonly and /tmp is a different file system.

My kernel has options WITNESS enabled.

The last step doesn't seem to be the only way to
get a problem, I tried the first four steps again
and umount /usr/src resulted in a reboot.

I was running Xorg and didn't get a panic, but I'll
try again without Xorg, to see if it's the same problem.

Fabian
--=20
http://www.fabiankeil.de/

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