[ENBD] fr1 hangs when trying to access raid device..

[Arve Emil Myrås]

This is the result form a test with "dd if=/dev/zero of=/dev/md0 bs=1024 count=200" on a no-smp kernel with smp disabled in bios and the same loop setup as used earlyer..

in the shell i get:

200+0 records in
200+0 records out
Segmentation fault

and in syslog:


Feb  4 17:20:04 vserv kernel: fr1 hotadd component 07:01[1] to device 0
Feb  4 17:20:04 vserv kernel: fr1 added new device 07:01 to f7a88e00 with err 0
Feb  4 17:20:04 vserv kernel: fr1 ioctl 400c0930
Feb  4 17:20:56 vserv kernel: Unable to handle kernel NULL pointer dereference at virtual address 00000010
Feb  4 17:20:56 vserv kernel:  printing eip:
Feb  4 17:20:56 vserv kernel: fad24c08
Feb  4 17:20:56 vserv kernel: *pde = 00000000
Feb  4 17:20:56 vserv kernel: Oops: 0000
Feb  4 17:20:56 vserv kernel: CPU:    0
Feb  4 17:20:56 vserv kernel: EIP:    0010:[<fad24c08>]    Not tainted
Feb  4 17:20:56 vserv kernel: EFLAGS: 00010046
Feb  4 17:20:56 vserv kernel: eax: 00000000   ebx: 00000000   ecx: c02e8b2c   edx: c02e8b2c
Feb  4 17:20:56 vserv kernel: esi: c02e8b4c   edi: c02e8b2c   ebp: f5267d94   esp: f5267d7c
Feb  4 17:20:56 vserv kernel: ds: 0018   es: 0018   ss: 0018
Feb  4 17:20:56 vserv kernel: Process dd (pid: 973, stackpage=f5267000)
Feb  4 17:20:56 vserv kernel: Stack: 00000000 f60eb640 c02e8b4c 00000296 c02e8b4c f5266000 c02e8b2c c01a21e6
Feb  4 17:20:56 vserv kernel:        c02e8b2c f5266000 c01a24dc c02e8b2c c01a26e8 00000000 f5266000 00000000
Feb  4 17:20:56 vserv kernel:        00000000 00000000 f5266000 00000000 00000000 00000001 c02e8b4c c02e8b4c
Feb  4 17:20:56 vserv kernel: Call Trace:    [<c01a21e6>] [<c01a24dc>] [<c01a26e8>] [<c01a2be2>] [<c01a312e>]
Feb  4 17:20:56 vserv kernel:   [<c01a31ed>] [<c013730c>] [<c01373e6>] [<c0137428>] [<c013750a>] [<c013c293>]
Feb  4 17:20:56 vserv kernel:   [<c013cd08>] [<c0137032>] [<c013570d>] [<c013578e>] [<c0108eff>]
Feb  4 17:20:56 vserv kernel:
Feb  4 17:20:56 vserv kernel: Code: 8a 43 10 8b 34 85 00 85 d2 fa 85 f6 0f 84 b6 00 00 00 8b 06


-Arve Emil