Date: Wed, 5 Aug 2009 08:50:22 +0200 From: Pawel Jakub Dawidek <pjd@FreeBSD.org> To: Thomas Backman <serenity@exscape.org> Cc: freebsd-fs@freebsd.org, FreeBSD current <freebsd-current@freebsd.org>, Andriy Gapon <avg@FreeBSD.org> Subject: Re: zfs: Fatal trap 12: page fault while in kernel mode Message-ID: <20090805065022.GI2181@garage.freebsd.pl> In-Reply-To: <CD114CD9-4968-47A7-BD16-C974E49232E5@exscape.org> References: <4A719CA4.4060400@freebsd.org> <19347561-3CE6-40B3-930A-EB9925D3AFD1@exscape.org> <4A71AD29.10705@freebsd.org> <7544AED1-1216-4A24-B287-F54117641F76@exscape.org> <4A71B239.8060007@freebsd.org> <3AA3C1CB-CEF7-46CC-A9C7-1648093D679E@exsca!pe.org> <4A71BED8.7050300@freebsd.org> <C7FEDA88-7A89-45DB-BD16-4C8816D17E0D@exscape.org> <BEC7EB06-3B69-4BBC-B143-409E55C1F3A8@exscape.org> <CD114CD9-4968-47A7-BD16-C974E49232E5@exscape.org>
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--GBuTPvBEOL0MYPgd Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, Jul 31, 2009 at 11:05:01AM +0200, Thomas Backman wrote: > I'm able to reliably reproduce this panic, by having zfs recv destroy =20 > a filesystem on the receiving end. >=20 > 1) Use DDEBUG=3D1, I guess > 2) Create a FS on the source pool you don't care about: zfs create -o =20 > mountpoint=3D/testfs source/testfs > 3) Clone a pool to another: zfs snapshot -r source@snap && zfs send -R = =20 > source@snap | zfs recv -Fvd target > 4) zfs destroy -r source/testfs > 4) zfs snapshot -r source@snap2 && zfs send -R -I snap source@snap2 | =20 > zfs recv -Fvd target > 5) ^ Panic while receiving the FS the destroyed one is mounted under. =20 > In my case, this was tank/root three times out of three; I then tried =20 > creating testfs under /tmp (tank/tmp/testfs), *mounting* it under /usr/= =20 > testfs, and it panics on receiving tank/usr: [...] I repeated precisevly those steps and it doesn't panic for me. Could you confirm that you use this patch? http://people.freebsd.org/~pjd/patches/zfs_vnops.c.2.patch If so, could you give me exact steps and all of them how to reproduce it? Starting with pool creation. --=20 Pawel Jakub Dawidek http://www.wheel.pl pjd@FreeBSD.org http://www.FreeBSD.org FreeBSD committer Am I Evil? Yes, I Am! --GBuTPvBEOL0MYPgd Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.4 (FreeBSD) iD8DBQFKeSuuForvXbEpPzQRAuS/AJwOZlaxRRNfY0kHKqIZYqPHLGsCpACeOr0h M3eYympUqyLOKJFgtKHsNXw= =eUAy -----END PGP SIGNATURE----- --GBuTPvBEOL0MYPgd--
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