Re: panic: ffs_valloc: dup alloc

["Steven M. Bellovin" <smb%cs.columbia.edu@localhost>]

On Mon, 19 Jan 2009 12:22:02 +0000
David Holland <dholland-current%netbsd.org@localhost> wrote:

> On Sun, Jan 18, 2009 at 04:07:05PM -0500, Steven M. Bellovin wrote:
>  > While I'm not seeing exactly that problem, I do see problems that
>  > result in duplicate blocks after a crash.  I think it's timing- and
>  > disk-layout dependent, but I do think there's a serious file system
>  > problem in -current.  I'm seriously contemplating wiping my disk
>  > and installing a system from a couple of months ago.
> 
> Do you have any ideas how one might set about replicating it? (What
> mount options, partition size, etc. are you using?)
> 
I posted the other day -- if I build devel/apr, even running
single-user (but only with SMP enabled), it always crashes the system,
generally with duplicate inodes under apr/work.

Here's the disk label:

# disklabel wd0
# /dev/rwd0d:
type: unknown
disk: ST9160823AS    
label: 
flags:
bytes/sector: 512
sectors/track: 63
tracks/cylinder: 16
sectors/cylinder: 1008
cylinders: 310101
total sectors: 312581808
rpm: 3600
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0           # microseconds
track-to-track seek: 0  # microseconds
drivedata: 0 

16 partitions:
#        size    offset     fstype [fsize bsize cpg/sgs]
 a: 196402752 107775360     4.2BSD   2048 16384     0  # (Cyl. 106920 - 301763)
 b:   8397648 304178112       swap                     # (Cyl. 301764 - 310094)
 c: 204800400 107775360     unused      0     0        # (Cyl. 106920 - 310094)
 d: 312581808         0     unused      0     0        # (Cyl.      0 - 310100)
 e:  12894208      2048    unknown                     # (Cyl.      2*-  12793*)
 f:  94878000  12897360       NTFS                     # (Cyl.  12795 - 106919)o

and mount:

# mount
/dev/wd0a on / type ffs (local)
mfs:149 on /tmp type mfs (synchronous, local)
kernfs on /kern type kernfs (local)
ptyfs on /dev/pts type ptyfs (local)
procfs on /proc type procfs (local)

In other words, nothing weird.


                --Steve Bellovin, http://www.cs.columbia.edu/~smb