Using the following:
Hardware:
ASUS P/I-P65UP5 and C-P55T2D CPU Card/MB
(2) 200 MHz Intel MMX CPU's
128 MB RAM
(128 MB Swap)
512K Pipeline cache
Buslogic BT-958
Micropolis 9GB SCSI-3
Archive DAT SCSI TBU
IBM SCSI CDROM
Tulip 21140 Fast Ethernet (@100)
ATI Mach64 VGA
System Software:
Kernel 2.2.1
Base Linux - SuSE 5.3
modutils 2.1.121
net-tools-1.49
tulip.c v.90
Ran the suggested crash test below for one hour - NO oopses.
Did get "Warning: dev (03:xx) tty>count(0) != #fd's (1) in
do_tty_hangup", where xx was 01,04,02,03,06, etc.
Lyle
Philippe Troin wrote:
>
> Philippe Troin <[EMAIL PROTECTED]> writes:
>
> Run the enclosed crashme program with a big number of concurrent
> processes while doing a lot of inode access like in:
>
> $ crashme 10 &
> $ while true; do find / > /dev/null; done &
>
> And you'll get:
> 1) A lot of "Warning: dev (03:07) tty->count(0) != #fd's(2) in
> do_tty_hangup"
> 2) A few Warning: null TTY for (03:01) in tty_fasync
> 3) And finally a couple of this oopses (or worse) (you might have to
> wait a few minutes for these)
>
> ==================== Begin Oops ====================
> Unable to handle kernel NULL pointer dereference at virtual address 00000000
> current->tss.cr3 = 05be1000, %cr3 = 05be1000
> *pde = 00000000
> Oops: 0002
> CPU: 1
> EIP: 0010:[<c019d926>]
> EFLAGS: 00010282
> eax: c7fc1020 ebx: 00000001 ecx: 00000009 edx: 00000001
> esi: c7fc1020 edi: 00000000 ebp: 00000000 esp: c7dfbe4c
> ds: 0018 es: 0018 ss: 0018
> Process find (pid: 196, process nr: 21, stackpage=c7dfb000)
> Stack: c7e8fd40 c7dfbe84 c7fc1000 00000000 c011172e c7fc1000 00000000 c7dfa000
> c7e8fd40 c7dfa000 c7e8fd40 00000000 00000001 c0242020 00000000 c0127601
> 00000002 c3df18e0 00000000 00000000 c7dfa000 c7e8fd6c c013d406 c7e8fd40
> Call Trace: [<c011172e>] [<c0127601>] [<c013d406>] [<c013af19>] [<c011c3e3>]
>[<c011c607>] [<c012f810>]
> [<c012f688>] [<c013ae50>] [<c0108c00>]
> Code: f3 a5 a1 c4 c3 27 c0 8b 74 24 10 39 86 c8 00 00 00 74 5b 8b
>
> >>EIP: c019d926 <do_tty_hangup+14a/2d0>
> Trace: c011172e <schedule+d2/360>
> Trace: c0127601 <__wait_on_buffer+c9/12c>
> Trace: c013d406 <ext2_bread+e2/114>
> Trace: c013af19 <ext2_readdir+c9/584>
> Trace: c011c3e3 <do_anonymous_page+97/a8>
> Trace: c011c607 <handle_mm_fault+103/1e8>
> Trace: c012f810 <sys_getdents+104/170>
> Trace: c012f688 <filldir+0/84>
> Code: c019d926 <do_tty_hangup+14a/2d0> 00000000 <_EIP>:
> Code: c019d926 <do_tty_hangup+14a/2d0> 0: f3 a5 repz movsl
>%ds:(%esi),%es:(%edi)
> Code: c019d928 <do_tty_hangup+14c/2d0> 2: a1 c4 c3 27 c0 movl
>0xc027c3c4,%eax
> Code: c019d92d <do_tty_hangup+151/2d0> 7: 8b 74 24 10 movl
>0x10(%esp,1),%esi
> Code: c019d931 <do_tty_hangup+155/2d0> b: 39 86 c8 00 00 cmpl
>%eax,0xc8(%esi)
> Code: c019d936 <do_tty_hangup+15a/2d0> 10: 00
> Code: c019d937 <do_tty_hangup+15b/2d0> 11: 74 5b je 6e
><_EIP+0x6e> c019d994 <do_tty_hangup+1b8/2d0>
> Code: c019d939 <do_tty_hangup+15d/2d0> 13: 8b 00 movl
>(%eax),%eax
> ==================== End Oops ====================
>
> The crashme thingie spawns <N> processes (<N> defined on the command
> line) which just open and close tty/pty pairs endlessly.
>
> This is on:
> Linux ceramic 2.2.1 #8 SMP Wed Feb 3 19:49:07 PST 1999 i686 unknown
> with 2 CPUs, without UNIX98_PTYS support.
>
> Phil.
>
> ------------------------------------------------------------------------
> Name: crashme.c
> crashme.c Type: unspecified type (application/octet-stream)
> Encoding: quoted-printable
--
Lyle P. Bickley | Bickley Consulting West Inc.
[EMAIL PROTECTED] | 1697 Grant Road
V 650-428-0621 | Mountain View, CA 94040
F 650-428-0599 |
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