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SubjectRe: test9-pre5+t9p2-vmpatch VM deadlock during write-intensive workload
> I had to type the oops down by hand, but I will provide ksymoops
> output soon if you need it.

Let's hope I typed down the oops from the screen without misstakes. Here
is the ksymoops output:

ksymoops 2.3.4 on i586 2.4.0-test9. Options used
-V (default)
-k 20000922143001.ksyms (specified)
-l 20000922143001.modules (specified)
-o /lib/modules/2.4.0-test9/ (default)
-m /boot/ (default)

invalid operand: 0000
CPU: 0
EIP: 0010:[<c012c1be>]
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010086
eax: 0000001c ebx: c31779e0 ecx: 00000000 edx: 00000082
esi: c11f6f80 edi: 00000008 ebp: 00000001 esp: c01f3eec
ds: 0018 es: 0018 ss: 0018
Process swapper (pid:0, stackpage=c01f3000)
Stack: c01bb465 c01bb79a 000002da c0150d3f e31779e0 00000001 c11f6480 00000046
c1168360 c0248460 c01684e3 c11f6f80 00000001 c0248584 00000000 c11f6f80
c02484a0 c016e563 00000001 c1168360 c02484a0 c1168360 00000286 c0169cc7
Call Trace: [<c01bb4b5>] [<c01bb79a>] [<c0150d3f>] [<c01684e3>]
[<c016e563>] [<c0169cc7>] [<c016e500>] [<c010a02c>] [<c010a18e>] [<c0107120>] [<c0108de0>]
[<c0107120>] [<c0107143>] [<c01071a7>] [<c0105000>]
Code: 0f 0b 83 c4 0c c3 57 56 53 86 74 24 10 8b 54 24 14 85 d2 74

>>EIP; c012c1be <end_buffer_io_bad+42/48> <=====
Trace; c01bb4b5 <tvecs+36dd/cde8>
Trace; c01bb79a <tvecs+39c2/cde8>
Trace; c0150d3f <end_that_request_first+5f/b8>
Trace; c01684e3 <ide_end_request+27/74>
Trace; c016e563 <ide_dma_intr+63/9c>
Trace; c0169cc7 <ide_intr+fb/150>
Trace; c016e500 <ide_dma_intr+0/9c>
Trace; c010a02c <handle_IRQ_event+30/5c>
Trace; c010a18e <do_IRQ+6e/b0>
Trace; c0107120 <default_idle+0/28>
Trace; c0108de0 <ret_from_intr+0/20>
Trace; c0107120 <default_idle+0/28>
Trace; c0107143 <default_idle+23/28>
Trace; c01071a7 <cpu_idle+3f/54>
Trace; c0105000 <empty_bad_page+0/1000>
Trace; c0100192 <L6+0/2>
Code; c012c1be <end_buffer_io_bad+42/48>
00000000 <_EIP>:
Code; c012c1be <end_buffer_io_bad+42/48> <=====
0: 0f 0b ud2a <=====
Code; c012c1c0 <end_buffer_io_bad+44/48>
2: 83 c4 0c add $0xc,%esp
Code; c012c1c3 <end_buffer_io_bad+47/48>
5: c3 ret
Code; c012c1c4 <end_buffer_io_async+0/b4>
6: 57 push %edi
Code; c012c1c5 <end_buffer_io_async+1/b4>
7: 56 push %esi
Code; c012c1c6 <end_buffer_io_async+2/b4>
8: 53 push %ebx
Code; c012c1c7 <end_buffer_io_async+3/b4>
9: 86 74 24 10 xchg %dh,0x10(%esp,1)
Code; c012c1cb <end_buffer_io_async+7/b4>
d: 8b 54 24 14 mov 0x14(%esp,1),%edx
Code; c012c1cf <end_buffer_io_async+b/b4>
11: 85 d2 test %edx,%edx
Code; c012c1d1 <end_buffer_io_async+d/b4>
13: 74 00 je 15 <_EIP+0x15> c012c1d3 <end_buffer_io_async+f/b4>

Aiee, killing interrupt handler
Kernel panic: Attempted to kill the idle task!

// André
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