Date: Thu, 24 Jul 2008 10:02:39 -0700 From: "Garrett Cooper" <yanefbsd@gmail.com> To: "Attilio Rao" <attilio@freebsd.org> Cc: Rink Springer <rink@freebsd.org>, Lothar Braun <lothar@lobraun.de>, freebsd-current@freebsd.org Subject: Re: panic: __lockmgr_args: unknown lockmgr request 0x0 Message-ID: <7d6fde3d0807241002u66f90717rbb3b97efa76423fd@mail.gmail.com> In-Reply-To: <3bbf2fe10807240817l7aedc58fnf56e54155d7beda7@mail.gmail.com> References: <487F32C6.5030502@lobraun.de> <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> <20080723153849.GA5117@rink.nu> <3bbf2fe10807240817l7aedc58fnf56e54155d7beda7@mail.gmail.com>
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On Thu, Jul 24, 2008 at 8:17 AM, Attilio Rao <attilio@freebsd.org> wrote: > 2008/7/23 Rink Springer <rink@freebsd.org>: >> 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? > > As long as you state that the write support is almost useless, I think > the better thing is that we should simply drop the write support for > the moment (and leaving the implementation there, of course, so that > interested hackers can keep solidifying the support). > > Thanks, > Attilio Knobs per src.conf for fs experimental functionality? -Garrett
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