/dev permissions after reboot (and panic)
pavalos at theshell.com
Sat Jul 16 21:51:54 PDT 2005
On Sat, Jul 16, 2005 at 08:23:11PM -0700, Peter Avalos wrote:
> On Sat, Jul 16, 2005 at 08:05:24PM -0700, Matthew Dillon wrote:
> > :Content-Type: text/plain; charset=us-ascii
> > :Content-Disposition: inline
> > :
> > :So every time I reboot, I get a panic (I believe someone else may
> > :be having this problem too). I've included a capture of the ddb
> > :session at the bottom. Unfortunately, I can't get a core dump.
> > :But, what really sucks, is if I did a 'MAKEDEV all', permissions
> > :in /dev get hosed when the machine comes back up. MAKEDEV is doing
> > :the right thing, because I've checked to make sure the devices
> > :have the correct permissions. When the machine comes back up,
> > :things like null, zero, tty, lose their write permissions, which
> > :hoses things up.
> > :
> > Which patch set is this with? The m_nextpkt != NULL is a warning
> > rather a panic, but the patch set I sent today should have fixed that.
> > The actual panic is occuring due to the buffers not being flushable,
> > which sounds like a softupdates issue so if the sync commands don't
> > fix the problem (or even if they do). See if turning off softupdates
> > fixes the problem (which will tell me where to look).
> That was with no patches...just straight-up HEAD. I'm compiling up a
> new kernel with the SOCKBUF_DEBUG patchset right now, and I'll see if
> that warning goes away. I'll also try turning off softupdates and see
> what happens.
I applied the SOCKBUF_DEBUG patch and rebooted. After the machine came up,
I tried a MAKEDEV, sync, waited about a mintue, then rebooted. I then got
panic: assertion: sb->sb_mb == m in sbunlinkmbuf
mp_lock = 00000000; cpuid = 0; lapic.id = 00000000
boot() called on cpu#0
Matt, as you know my remote console really sucks, so I wasn't able to
get everything, but I did get a sucessfuly dump. That's uploading to
leaf right now (*.12).
Hopefully it's useful.
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