Date: Thu, 12 Mar 2009 13:52:39 -0700 From: Tim Kientzle <kientzle@freebsd.org> To: Peter Schuller <peter.schuller@infidyne.com> Cc: freebsd-current@freebsd.org, Mark Powell <M.S.Powell@salford.ac.uk> Subject: Re: repeatable ZFS panic: share->excl Message-ID: <49B97617.8010709@freebsd.org> In-Reply-To: <20090312191333.GA97342@hyperion.scode.org> References: <20090312175345.Y80227@rust.salford.ac.uk> <20090312191333.GA97342@hyperion.scode.org>
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Peter Schuller wrote: >> First problem I notice is a panic, which seems to occur every time 'tar' >>is used. Might be unrelated to tar, but it definately provokes it. Simply >>the tar command or a pkg_add causes it. > > See the "ZFS/extattr lockup"/"bsdtar lockup on current" threads from > the past handful of days. 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. 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? 2) Is this on extraction or just create? 3) Can you run tar under "ktrace" and figure out what system call is provoking the problem? Tim
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