Date: Thu, 12 Mar 2009 22:23:09 +0000 (GMT) From: "Mark Powell" <M.S.Powell@salford.ac.uk> To: Tim Kientzle <kientzle@freebsd.org> Cc: freebsd-current@freebsd.org, Peter Schuller <peter.schuller@infidyne.com> Subject: Re: repeatable ZFS panic: share->excl Message-ID: <20090312210553.Q1510@rust.salford.ac.uk> In-Reply-To: <49B97617.8010709@freebsd.org> References: <20090312175345.Y80227@rust.salford.ac.uk> <20090312191333.GA97342@hyperion.scode.org> <49B97617.8010709@freebsd.org>
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On Thu, 12 Mar 2009, Tim Kientzle wrote: > I think this may be a different problem. The earlier thread involved a > ZFS bug that causes it to lock up if it receives a request to enumerate > extended attributes on a file (via extattr_list_link system call). Tar > recently added support for backing up extended attributes. I've > disabled that support until this particular ZFS problem can be fixed. I just rebuilt world on one box and the problem went away. Your fix I assume? > However, pkg_add uses tar to extract archives, not create them, so this > is not the same problem. I haven't disabled tar support for restoring > extended attributes, but no existing packages should have extended > attributes to be restored, so I doubt this is the same issue. > > 1) Do you get the same symptoms on UFS? No problems on UFS. > 2) Is this on extraction or just create? The problem occurs with just tar create. I'm not sure why pkg_add provokes it. > 3) Can you run tar under "ktrace" and figure out what system call is > provoking the problem? I'm not sure how I could dump the ktrace.out after a panic. A truss of a tar create on a zfs volume shows the last call to be: __acl_get_file(...) ERR#45 'Operation not supported' shared lock of (lockmgr) zfs @ /usr/src/sys/kern/vfs_lookup.c:442 Cheers. -- Mark Powell - UNIX System Administrator - The University of Salford Information & Learning Services, Clifford Whitworth Building, Salford University, Manchester, M5 4WT, UK. Tel: +44 161 295 6843 Fax: +44 161 295 5888 www.pgp.com for PGP key
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