Date: Fri, 30 May 2008 08:54:39 +0200 From: Pawel Jakub Dawidek <pjd@FreeBSD.org> To: Niki Denev <nike_d@cytexbg.com> Cc: freebsd-fs@freebsd.org Subject: Re: ZFS panic when changing zfs dataset mountpoint Message-ID: <20080530065439.GB3596@garage.freebsd.pl> In-Reply-To: <2e77fc10802120304n32fd1c42m52e6bc617ba07c35@mail.gmail.com> References: <2e77fc10802120304n32fd1c42m52e6bc617ba07c35@mail.gmail.com>
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--l76fUT7nc3MelDdI Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Feb 12, 2008 at 01:04:38PM +0200, Niki Denev wrote: > Hi, >=20 > I got the following panic when trying to set/change the mountpoint > property of a dataset. >=20 > I did : > # zfs set mountpoint=3D/usr/ports zfs2/ports > and the machine crashed. >=20 > The datased had one snapshot taken. >=20 > Here is what i was able to extract from the dump : [...] > #8 0xffffffff804800d5 in _sx_xlock (sx=3D0xa0, opts=3D0, > file=3D0xffffffff80c697f0 > "/usr/src/sys/modules/zfs/../../contrib/opensolaris/uts/common/fs/zfs/zfs= _ctldir.c", > line=3D1069) at atomic.h:142 > #9 0xffffffff80c50b2a in zfsctl_umount_snapshots (vfsp=3DVariable > "vfsp" is not available. > ) at /usr/src/sys/modules/zfs/../../contrib/opensolaris/uts/common/fs/zfs= /zfs_ctldir.c:1069 > #10 0xffffffff80c57978 in zfs_umount (vfsp=3D0xffffff00014f5650, > fflag=3D0, td=3D0xffffff001483b6a0) > at /usr/src/sys/modules/zfs/../../contrib/opensolaris/uts/common/fs/z= fs/zfs_vfsops.c:692 [...] I tried to reproduce your problem, but I can't. This is clearly related to unmounting snapshots. Was your snapshot mounted at the time of calling 'zfs set mountpoint=3D'? I tried both scenarious (having mounted and unmounted snapshot) and no panic. Is there anything else you did? --=20 Pawel Jakub Dawidek http://www.wheel.pl pjd@FreeBSD.org http://www.FreeBSD.org FreeBSD committer Am I Evil? Yes, I Am! --l76fUT7nc3MelDdI Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.4 (FreeBSD) iD8DBQFIP6SuForvXbEpPzQRAl4iAJ9ypW2a5yLlAATkO9iJ/X+mAmNjuwCcCj1Q BWoKpnxopLFFHDAMf92rXEc= =Nhw6 -----END PGP SIGNATURE----- --l76fUT7nc3MelDdI--
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