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SubjectRe: DEVFS broken?
From
Also using Debian sid here (devfsd 1.3.21-1). Over the past two days
I've seen random nasties with devfs-v199.6 and v199.7 (I backed out
v199.7 in my local tree because my machine refuses to finish booting
otherwise). Machine: VIA VT82C693A/694x, PIII/1GHz SMP, 1GB HIGHMEM
enabled.

What follows is a series of crashes culled from /var/log/kern.log
(apologies regarding the format). Before each I'll explain what I did to
possibly invoke it. All are with devfs-v199.6 and devfsd-1.3.21 running
2.4.18-pre4 + ext3-2.4-0.9.17-2418p3 + ide.2.4.16.12102001:

# modprobe aic7xxx //I tried to start an Eterm in X 4.1.0.1 afterward
-- snip --
Jan 16 22:54:50 opeth kernel: invalid operand: 0000
Jan 16 22:54:50 opeth kernel: CPU: 0
Jan 16 22:54:50 opeth kernel: EIP: 0010:[d_instantiate+17/68]
Tainted: P
Jan 16 22:54:50 opeth kernel: EFLAGS: 00010202
Jan 16 22:54:50 opeth kernel: eax: 5a5a5a00 ebx: f6b5f560 ecx:
f7aa1b80 ed
x: f6b5f590
Jan 16 22:54:50 opeth kernel: esi: f7aa1b80 edi: f6b5f560 ebp:
f7a7f840 es
p: f7a41f18
Jan 16 22:54:50 opeth kernel: ds: 0018 es: 0018 ss: 0018
Jan 16 22:54:50 opeth kernel: Process devfsd (pid: 26,
stackpage=f7a41000)
Jan 16 22:54:50 opeth kernel: Stack: f77d9460 c0179b13 f6b5f560 f7aa1b80
f6b5f56
0 00000000 f7a41fa4 f7a83620
Jan 16 22:54:50 opeth kernel: c01409be f6b5f560 00000000 f7a41f74
c014118
1 f7a83620 f7a41f74 00000000
Jan 16 22:54:50 opeth kernel: f60d4000 00000000 f7a41fa4 00000009
0000000
9 f60d4005 00000000 f60d4004
Jan 16 22:54:50 opeth kernel: Call Trace:
[devfs_d_revalidate_wait+231/276] [cac
hed_lookup+46/84] [link_path_walk+1409/2016] [path_walk+26/28]
[__user_walk+53/8
0]
Jan 16 22:54:50 opeth kernel: [sys_stat64+25/112] [sys_read+188/196]
[system_
call+51/56]
Jan 16 22:54:50 opeth kernel:
Jan 16 22:54:50 opeth kernel: Code: 0f 0b f0 fe 0d a0 66 2d c0 0f 88 43
09 00 00
85 c9 74 12 8b
Jan 16 23:09:25 opeth kernel: <7>VFS: Disk change detected on device
ide1(22,0)
Jan 16 23:55:23 opeth kernel: scsi0 : Adaptec AIC7XXX EISA/VLB/PCI SCSI
HBA DRIV
ER, Rev 6.2.4
Jan 16 23:55:23 opeth kernel: <Adaptec aic7860 Ultra SCSI
adapter>
Jan 16 23:55:23 opeth kernel: aic7860: Ultra Single Channel A,
SCSI Id=7
, 3/253 SCBs
Jan 16 23:55:23 opeth kernel:
Jan 16 23:55:39 opeth kernel: Vendor: PLEXTOR Model: CD-ROM PX-40TS
Rev:
1.04
Jan 16 23:55:39 opeth kernel: Type: CD-ROM
ANSI
SCSI revision: 02
Jan 16 23:55:39 opeth kernel: Attached scsi CD-ROM sr0 at scsi0,
channel 0, id 3
, lun 0
Jan 16 23:55:39 opeth kernel: (scsi0:A:3): 20.000MB/s transfers
(20.000MHz, offs
et 15)
Jan 16 23:55:39 opeth kernel: sr0: scsi-1 drive
Jan 16 23:59:45 opeth kernel: invalid operand: 0000
Jan 16 23:59:45 opeth kernel: CPU: 1
Jan 16 23:59:45 opeth kernel: EIP: 0010:[d_instantiate+17/68]
Tainted: P
Jan 16 23:59:45 opeth kernel: EFLAGS: 00010202
Jan 16 23:59:45 opeth kernel: eax: 5a5a5a00 ebx: e7304660 ecx:
e8d92e00 ed
x: e7304690
Jan 16 23:59:45 opeth kernel: esi: f742f520 edi: f7ea9140 ebp:
e7304660 es
p: ea08deb4
Jan 16 23:59:45 opeth kernel: ds: 0018 es: 0018 ss: 0018
Jan 16 23:59:45 opeth kernel: Process Eterm (pid: 4924,
stackpage=ea08d000)
Jan 16 23:59:45 opeth kernel: Stack: e8d92e00 c0179d4e e7304660
e8d92e00 fffffff
4 f7a7f840 ea08c000 e7304660
Jan 16 23:59:45 opeth kernel: f7ea914c c0287c80 f3b1b600
c0126938 f6fddb6
0 f3b1b600 4038dc00 00000000
Jan 16 23:59:45 opeth kernel: 00000246 00000000 f7a7f840
f7a7f8a8 f7a8362
0 00000246 c0149613 c200f288
Jan 16 23:59:45 opeth kernel: Call Trace: [devfs_lookup+526/600]
[handle_mm_faul
t+92/184] [d_alloc+27/376] [real_lookup+122/264]
[link_path_walk+1431/2016]
Jan 16 23:59:45 opeth kernel: [path_walk+26/28] [__user_walk+53/80]
[sys_stat
64+25/112] [sys_ioctl+490/497] [system_call+51/56]
Jan 16 23:59:45 opeth kernel:
Jan 16 23:59:45 opeth kernel: Code: 0f 0b f0 fe 0d a0 66 2d c0 0f 88 43
09 00 00
85 c9 74 12 8b
-- snip --
//this one occurred during boot
-- snip --
Jan 17 00:07:47 opeth kernel: invalid operand: 0000
Jan 17 00:07:47 opeth kernel: CPU: 0
Jan 17 00:07:47 opeth kernel: EIP: 0010:[d_instantiate+17/68]
Tainted: P
Jan 17 00:07:47 opeth kernel: EFLAGS: 00010287
Jan 17 00:07:47 opeth kernel: eax: 5a5a5a00 ebx: f7228540 ecx:
f7215060 ed
x: f7228570
Jan 17 00:07:47 opeth kernel: esi: f7215060 edi: f7228540 ebp:
f7a810c0 es
p: f7a41f18
Jan 17 00:07:47 opeth kernel: ds: 0018 es: 0018 ss: 0018
Jan 17 00:07:47 opeth kernel: Process devfsd (pid: 26,
stackpage=f7a41000)
Jan 17 00:07:47 opeth kernel: Stack: f7252940 c0179b13 f7228540 f7215060
f722854
0 00000000 f7a41fa4 f7a82a20
Jan 17 00:07:47 opeth kernel: c01409be f7228540 00000000 f7a41f74
c014118
1 f7a82a20 f7a41f74 00000000
Jan 17 00:07:47 opeth kernel: f7854000 00000000 f7a41fa4 00000009
0000000
9 f7854005 00000000 f7854004
Jan 17 00:07:47 opeth kernel: Call Trace:
[devfs_d_revalidate_wait+231/276] [cac
hed_lookup+46/84] [link_path_walk+1409/2016] [path_walk+26/28]
[__user_walk+53/8
0]
Jan 17 00:07:47 opeth kernel: [sys_stat64+25/112] [sys_read+188/196]
[system_
call+51/56]
Jan 17 00:07:47 opeth kernel:
Jan 17 00:07:47 opeth kernel: Code: 0f 0b f0 fe 0d a0 66 2d c0 0f 88 43
09 00 00 85 c9 74 12 8b
-- snip --
Interestingly enough, I applied rml's preempt-kernel-rml-2.4.18-pre4-1,
recompiled, rebooted, and have yet to see an oops, though I believe it's
just dumb luck thus far. Any ideas?

On Thu, Jan 17, 2002 at 09:12:29AM -0800, Lawrence Walton wrote:
> I am not sure how to debug this but it apears that
> in 2.5.3-pre1 and in 2.5.2-dj1 DEVFS is not working.
> It started by terminals hanging and not being able to
> shutdown.
> I went to /dev/ and did a ls, it compleatly hangs that
> terminal and I cannot kill ls.
> I have the devfsd version from debian 1.3.21 .

--
Dan Chen crimsun@email.unc.edu
GPG key: www.unc.edu/~crimsun/pubkey.gpg.asc
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