Date: Tue, 5 Feb 2008 17:38:18 +0100 From: "Attilio Rao" <attilio@freebsd.org> To: "Yar Tikhiy" <yar@comp.chem.msu.su> Cc: Kostik Belousov <kostikbel@gmail.com>, Scot Hetzel <swhetzel@gmail.com>, freebsd-current@freebsd.org, Doug Barton <dougb@freebsd.org> Subject: Re: panic: System call lstat returning with 1 locks held Message-ID: <3bbf2fe10802050838p6272edces948789be6b1ddc4b@mail.gmail.com> In-Reply-To: <20080205163602.GB56373@comp.chem.msu.su> References: <3bbf2fe10801291411v302dd33at54ebe538397e8fac@mail.gmail.com> <3bbf2fe10801300707u3fd121c0k199605c2f0be6cbf@mail.gmail.com> <790a9fff0801301352xa91a69ci3f08488dfcfc982@mail.gmail.com> <3bbf2fe10801310243tddedfeckbc4c94be87f0a4ca@mail.gmail.com> <20080131130210.GA37090@comp.chem.msu.su> <3bbf2fe10801310504j486924bdm86e0436597a42b09@mail.gmail.com> <790a9fff0801312241s346068b6s40fcae71ebbf546@mail.gmail.com> <20080201145051.GE79881@comp.chem.msu.su> <3bbf2fe10802011041t28e419c9n5f0f6f34d6450184@mail.gmail.com> <20080205163602.GB56373@comp.chem.msu.su>
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2008/2/5, Yar Tikhiy <yar@comp.chem.msu.su>: > BTW, I seem to be hitting yet another lockmgr-related panic. > > My system won't reboot under certain conditions: it'll panic instead > in vfs_unmountall(). Namely it will panic if I reboot from single-user > mode while it'll reboot OK from multi-user mode. I have no idea > yet about the exact reason for the behaviour. The output from kgdb > attached. > > Note that this panic shouldn't be NTFS-related as I can trigger it > by typing `reboot' immediately after booting into single user. Yes, sorry for this. I know of this and I alredy patched my tree. I did the WITNESS stuff based on the assumption drained lock will never be release while they are. Unmounting is currently the only one consumer of LK_DRAIN I know of and I just need to do a WITNESS_LOCK() over there. I will provide you an updated patch about this problem and another one found by kris@. I will look later at the backtrace so we can go on. Thanks, Attilio -- Peace can only be achieved by understanding - A. Einstein
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