bad magic, wq bug -- HELP !

bad magic, wq bug -- HELP !

Post by deja4.. » Sun, 24 Sep 2000 04:00:00



Hi everybody,

please find below a kernel OOPS on wq. Used kernel was 2.3.99-pre9 but
same things happen w/ 2.4.0-test8 (sometimes w/ sometimes w/o OOPS.) In
any case: the machine crashes.
To (re)produce the behaviour, I started ca. 600 ftp clients, getting a
10mb file -- well, yes, 600 ftp sessions is a lot, but I need to test
load, so I use whatever I can get (and 600 shouldn't be the limit,
should it ?)  Anyways, I've tuned up the NR_TASKS to 4090 and the
NR_FILES to 32768 -- ftp is not the only way to crash the system wq but
the easiest one...
Is there any HELP - any idea, what I can do/tune?
Thanks a lot,

Immanuel

Sep 22 00:43:33 ipat01 kernel: bad magic d897e060 (should be d897e020),
wq bug, forcing oops.
Sep 22 00:43:33 ipat01 kernel: kernel BUG at
/usr/src/linux/include/linux/wait.h:196!
Sep 22 00:43:33 ipat01 kernel: invalid operand: 0000
Sep 22 00:43:33 ipat01 kernel: CPU:    0
Sep 22 00:43:33 ipat01 kernel: EIP:    0010:[free_wait+154/284]
Sep 22 00:43:33 ipat01 kernel: EFLAGS: 00010086
Sep 22 00:43:33 ipat01 kernel: eax: 00000037   ebx: d897e020   ecx:
0000007c   e
dx: c02b66b4
Sep 22 00:43:33 ipat01 kernel: esi: d897e00c   edi: d897e000   ebp:
00000287   e
sp: e137ff10
Sep 22 00:43:33 ipat01 kernel: ds: 0018   es: 0018   ss: 0018
Sep 22 00:43:33 ipat01 kernel: Process atAgent_01.tcl (pid: 814,
stackpage=e137f
000)
Sep 22 00:43:33 ipat01 kernel: Stack: c024f904 c024f8e0 000000c4
00000000 de766e
a0 de766ea0 00000000 c013d947
Sep 22 00:43:33 ipat01 kernel:        d897e000 00000001 00000004
e5054ef8 000000
00 e137e000 00000104 00000100
Sep 22 00:43:33 ipat01 kernel:        e137e000 00000000 00000009
d897e000 000000
00 00000009 c013dcd2 00000009
Sep 22 00:43:33 ipat01 kernel: Call Trace: [tvecs+26816/144476]
[tvecs+26780/144476] [do_select+579/604] [sys_select+882/1192]
[system_call+52/64]
Sep 22 00:43:33 ipat01 kernel: Code: 0f 0b 83 c4 0c 90 8d 74 26 00 8b 43
fc 8b 53 f8 89 42 04 89

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