Hi all !!
This is just to reinforce the message below.
This crash is ver easy to reproduce.
Use bootldr (with the last patch from Nico) [it also happens with
Redboot]
+
Lunix 2.4.0 + patch rmk2 + diff rmk2-np2
+ a ramdisk.
Once logged in Linux, type these commands :
SHELL> mknod /dev/dsp c 14 3
SHELL> echo foo > /dev/dsp
and there you are => kernel crash
I had a deeper look and this seems to be the scheduler that is not
handling some page stuff properly (I am not a specialist but this is
what I observed).
This has been reported several times in various mailing lists. I haven't
found yet
any patch fixing this.
Is there someone around the place looking at this problem as many people
seem to be waiting
for this fix ???
Thanks again folks,
Cyrille
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
Sent: Sunday, April 01, 2001 12:15 PM
To: [EMAIL PROTECTED]; [EMAIL PROTECTED]
Subject: kernel crash
This is a general plea for help .. We were told Linux was the most
stable OS
for embedded work so we put it to use in running our ARM based
pacemaker.
It did well on the preliminary tests using simulated output we managed 3
weeks with no problems and almost perfect rhythm generation.
On the fourth week we began animal testing our product and it did fine
for 5
days 3 hours and 10 minutes.
On Thursday March 22 at 0419 hrs a software crash caused a malfunction
in
the pacemaker resulting in a large discharge of current, defibrilating
the
heart and forcing it into an angonal rhythm from which we were unable to
cardiovert.
On top of that, the catastrophic failure means we will be unable to
begin
human testing of our product until early 2003.
One of our techs managed to retrieve something he called an "oops"? from
the
monitor and I've enclosed it below. If anyone can help us with this
please
get back to me. We need to fix this as soon as possible so we can make
final
product release as early as possible.
sincerely,
Dr. Nakasumo
Cardiac Products Dept.
APF Bioelectronics
Unable to handle kernel paging request at virtual address ea0032fb
pgd = c0004000
*pgd = 00000000, *pmd = 00000000
Internal error: Oops: 2
CPU: 0
pc : [<c0021124>] lr : [<c0021450>]
sp : c8785c98 ip : a0000013 fp : c8785cd0
r10: 01000000 r9 : 00000003 r8 : c8785cf8
r7 : 00000003 r6 : 00003240 r5 : e7933000 r4 : ea0032fb
r3 : 00000001 r2 : 01000000 r1 : c016209c r0 : ea0032fb
Flags: nzcv IRQs on FIQs on Mode SVC_32 Segment kernel
Control: C860117F Table: C860117F DAC: 0000001D
Process mtdblockd (pid: 7, stackpage=c8785000)
Stack:
c8785c80: c0021450 c0021124 00000013 ffffffff
00000000 00000
000
c8785ca0: 00000000 00000004 ffffffff ea0032fb c8785cf8 c0121cf4
00000003 a0000
013
c8785cc0: 00000000 c8785cf4 c8785cd4 c0021450 c0020e44 ffffffff
c8785d2c c9000
000
c8785ce0: c8785e28 00000005 c8785d4c c8785cf8 c001ab20 c0021390
00003240 00000
000
c8785d00: ea0032fb ea0000bb ffffffff c8784000 c9000000 c8785e28
00000005 00000
000
c8785d20: 00000000 c8785d4c c0374821 c8785d40 c0020d00 c0020afc
a0000013 fffff
fff
c8785d40: c8785e00 c8785d50 c0020d00 c0020ad0 00000000 00000000
00000000 00000
000
c8785d60: 00000000 00000000 00000000 c8784000 00000000 00000001
c8785da4 c8785
d88
c8785d80: c0036390 c0036260 40000013 fa000000 c8785e0c fa000014
c8785dbc c8785
da8
c8785da0: c00367e4 c0036368 40000013 fa000000 c8785ddc c8785dc0
c001aa08 c0036
7c0
c8785dc0: 00000000 0000001a 00000000 c01893b0 c8785e08 c8785de0
ffffffff c9000
000
c8785de0: c8785e28 c0121d0c 00000005 20000013 00800080 c8785e24
c8785e04 c0021
450
c8785e00: c0020b2c ffffffff c8785e5c 00000000 00000000 ffffffff
c8785e94 c8785
e28
c8785e20: c001ab20 c0021390 c9000000 e8040020 0003ffe0 00000000
00000000 00000
000
c8785e40: 00000000 00000000 ffffffff ffffffff 00800080 c8785e94
ffffffff c8785
e70
c8785e60: c00bf190 c011a7c0 20000013 ffffffff 00040000 00040000
c9000000 00040
000
c8785e80: 00000000 c8036504 c8785eb0 c8785e98 c00bf190 c011a78c
c0189c60 c8036
4c0
c8785ea0: c015ddf0 c8785f28 c8785eb4 c00bc964 c00bf168 c8784000
c8036504 c8784
000
c8785ec0: 0000090d 00000000 00040000 00000000 00040000 00000000
c80364c0 00040
000
c8785ee0: 00000000 c8784000 00000000 00000000 00000000 c8784000
00000000 00000
000
c8785f00: 00040000 00000000 00000000 00000000 00040000 c9000000
c8785f78 c8785
f5c
c8785f20: c8785f2c c00b9ed4 c00bc0e4 c8785f78 c9000000 c01cf428
c01cf420 00001
000
c8785f40: 00000000 00040000 00000000 00000000 c8785fa4 c8785f60
c00bf588 c00b9
e1c
c8785f60: c8785f78 c9000000 00040000 c01db160 c0350000 00001000
00000000 c01cf
428
c8785f80: c02d0660 00000008 c018e158 c015de90 6901b116 c015de78
c8785fc4 c8785
fa8
c8785fa0: c00bfcd4 c00bf414 00000000 c8784000 c8785fc8 c018e158
c8785ffc c8785
fc8
c8785fc0: c00bfee4 c00bfba8 00000000 c8784000 c015de94 c015de94
00000000 c0187
160
c8785fe0: c0187120 c0188ba4 c018c494 c0014c34 00000000 c8786000
c001c620 c00bf
d8c
Backtrace:
Function entered at [<c0020e38>] from [<c0021450>] do_alignment
Function entered at [<c0021384>] from [<c001ab20>] do_data_abort
r8 = 00000005 r7 = C8785E28 r6 = C9000000 r5 = C8785D2C
r4 = FFFFFFFF
Function entered at [<c0020ac4>] from [<c0020d00>] __do_vmalloc_fault
Function entered at [<c0020b20>] from [<c0021450>] __do_page_fault
Function entered at [<c0021384>] from [<c001ab20>] do_DataAbort
r8 = FFFFFFFF r7 = 00000000 r6 = 00000000 r5 = C8785E5C
r4 = FFFFFFFF
Function entered at [<c011a780>] from [<c00bf190>] memcpy
r9 = C8036504 r8 = 00000000 r7 = 00040000 r6 = C9000000
r5 = 00040000 r4 = 00040000
Function entered at [<c00bf15c>] from [<c00bc964>] sa1100_copy_from
r6 = C015DDF0 r5 = C80364C0 r4 = C0189C60
Function entered at [<c00bc0d8>] from [<c00b9ed4>] cfi_intelext_read
Function entered at [<c00b9e10>] from [<c00bf588>] part_read
Function entered at [<c00bf408>] from [<c00bfcd4>] do_cached_write
Function entered at [<c00bfb9c>] from [<c00bfee4>]
handle_mtdblock_request
r7 = C018E158 r6 = C8785FC8 r5 = C8784000 r4 = 00000000
Function entered at [<c00bfd80>] from [<c001c620>] mtdblock_thread
Aiee, killing interrupt handler
Scheduling in interrupt
kernel BUG at sched.c:698!
Unable to handle kernel NULL pointer dereference at virtual address
00000000
pgd = c0004000
*pgd = c01a0001, *pmd = c01a0001, *pte = c000308b, *ppte = c000300a
Internal error: Oops: 0
CPU: 0
pc : [<c001fdc8>] lr : [<c002e0ac>]
sp : c8785b08 ip : c8785ac4 fp : c8785b18
r10: 00000000 r9 : c0189c60 r8 : 00000000
r7 : 0000000b r6 : c8784000 r5 : c8784000 r4 : 00000000
r3 : 00000000 r2 : c0154ea8 r1 : 00000000 r0 : 00000001
Flags: nZCv IRQs on FIQs on Mode SVC_32 Segment kernel
Control: C860117F Table: C860117F DAC: 0000001D
Process mtdblockd (pid: 7, stackpage=c8785000)
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