Date: Wed, 23 Jul 2008 17:38:49 +0200 From: Rink Springer <rink@FreeBSD.org> To: Attilio Rao <attilio@freebsd.org> Cc: Lothar Braun <lothar@lobraun.de>, freebsd-current@freebsd.org Subject: Re: panic: __lockmgr_args: unknown lockmgr request 0x0 Message-ID: <20080723153849.GA5117@rink.nu> In-Reply-To: <3bbf2fe10807200926k5aa8fd2an7b2689f92bbba05d@mail.gmail.com> References: <487F32C6.5030502@lobraun.de> <3bbf2fe10807171306y59d30b13y868c1e27697412a7@mail.gmail.com> <48805EEE.90109@lobraun.de> <48806684.4000908@FreeBSD.org> <4880921C.10700@lobraun.de> <3bbf2fe10807190827k24c738c9s4f258ac006035b75@mail.gmail.com> <48833C50.8030507@lobraun.de> <3bbf2fe10807200904y32cc6d04n94bc262aa3c6c2be@mail.gmail.com> <3bbf2fe10807200926k5aa8fd2an7b2689f92bbba05d@mail.gmail.com>
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On Sun, Jul 20, 2008 at 06:26:04PM +0200, Attilio Rao wrote: > 2008/7/20, Attilio Rao <attilio@freebsd.org>: > > 2008/7/20, Lothar Braun <lothar@lobraun.de>: > > > > > Hi Attilio, > > > > > > > > > > > > > can you please try this on the top of -CURRENT: > > > > http://www.freebsd.org/~attilio/xfs2.diff > > > > > > > > > > Thank you for the patch. The panic and the dead lock disappeard, but there > > > is a new problem insteed. The commands > > > > > > mkfs.xfs /dev/ad8s4 > > > mount -t xfs /dev/ad8s4 /home > > > mkdir /home/lothar > > > chown lothar:lothar /home/lothar > > > > > > For what I remind, it is likely XFS is still not ready for writing. > > This means you should only use it in read-only. > > Speaking of which, I think we should mark it again like a read-only fs > until writing is not 100% ready. NTFS suffers from the same issue; it 'kind of' supports writes. The result is that it supports writes in so limited circumstances that the write support is mostly useless (and it even tends to lead to panics...) I think a better solution is to mount such filesystems r/o by default, and only mount them r/w if explicitely asked to do so, for example by '-o rw' - it would make things a lot clearer for our users when trying to use filesystems, and brave souls are always welcome to force r/w that way. What do you think? -- Rink P.W. Springer - http://rink.nu "Anyway boys, this is America. Just because you get more votes doesn't mean you win." - Fox Mulder
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