Date: Tue, 18 Mar 2008 05:59:59 +0300 From: pluknet <pluknet@gmail.com> To: "Alex Goncharov" <alex-goncharov@comcast.net> Cc: freebsd-current@freebsd.org Subject: Re: Seeing lock order reversal Message-ID: <a31046fc0803171959n65faaf0oc9fc248ebdd8abd3@mail.gmail.com> In-Reply-To: <E1JbP4P-0000hU-L3@daland.home> References: <E1JbP4P-0000hU-L3@daland.home>
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On 18/03/2008, Alex Goncharov <alex-goncharov@comcast.net> wrote: > [ Sorry if this is old news or not useful ] > > I am trying to source-upgrade one of my 7.0 systems to 8.0-CURRENT. > > In the following, when I say "build", it means "csup and build right > away". > > The very first 8.0 build (this morning) gave me the kernel that didn't > boot. Built it again, finishing about 15 minutes ago. This one > booted all right but I see this in `/var/log/messages': > [there was stripped LORs] It's due to recent WITNESS lockmgr support that unhides existing LORs. Thought taking that into account I could obtain a new one yesterday. I didn't see this before. Mar 17 03:17:14 pl sudo: pluknet : TTY=ttyv1 ; PWD=/usr/home/pluknet ; USER=root ; COMMAND=/usr/libexec/getty 3wire.9600 ttyd0 Mar 17 03:17:14 pl kernel: lock order reversal: Mar 17 03:17:14 pl kernel: 1st 0xc07e9274 proctree (proctree) @ /usr/src/sys/kern/kern_exit.c:291 Mar 17 03:17:14 pl kernel: 2nd 0xc2fc49e8 devfs (devfs) @ /usr/src/sys/kern/vfs_subr.c:2158 wbr, pluknet
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