2005-12-07 22:17:44

by Badari Pulavarty

Subject: 2.6.15-rc4 Oops in show_smaps()

Hi,

I am getting Oops while doing

cat /proc/<pid>/smaps

Known issue ?

Thanks,
Badari

Unable to handle kernel paging request for data at address
0xc0000001006d3698
Faulting instruction address: 0xc0000000001083a8
Oops: Kernel access of bad area, sig: 11 [#1]
SMP NR_CPUS=128 NUMA PSERIES LPAR
Modules linked in: evdev joydev st usbserial ehci_hcd ohci_hcd ipv6
usbcore dm_mod
NIP: C0000000001083A8 LR: C0000000001082A8 CTR: 0000000000000000
REGS: c0000000da7ff860 TRAP: 0300 Not tainted (2.6.15-rc4)
MSR: 8000000000009032 <EE,ME,IR,DR> CR: 24000424 XER: 20000010
DAR: C0000001006D3698, DSISR: 0000000040010000
TASK = c0000000e6937040[11420] 'cat' THREAD: c0000000da7fc000 CPU: 2
GPR00: 0000004000000600 C0000000DA7FFAE0 C000000000635AF8
C0000000DA7FFB50
GPR04: 0000000000000000 0000000000000000 C0000000DA7FFB78
0000000000000000
GPR08: 0004000000600000 0000000100000018 0000000600000793
C0000000006D3680
GPR12: 0000000022000428 C0000000004DE000 000001003FFFFFFF
C00000000F5FECC0
GPR16: C0000000EB22FC00 0000010040000000 000001003FFFFFFF
C0000000D984E100
GPR20: 0000000000000038 0000010040000000 000001000FFFFFFF
C0000000E2A68000
GPR24: 000000001001740A 0000010010000000 C0000000DA7FFB50
C0000000E2A68400
GPR28: 0000010000200000 0000010000000000 C00000000055ED50
0000010000000000
NIP [C0000000001083A8] .show_smap+0x170/0x39c
LR [C0000000001082A8] .show_smap+0x70/0x39c
Call Trace:
[C0000000DA7FFAE0] [C000000000108544] .show_smap+0x30c/0x39c
(unreliable)
[C0000000DA7FFC10] [C0000000000EC2BC] .seq_read+0x4bc/0x510
[C0000000DA7FFCF0] [C0000000000BB400] .vfs_read+0x174/0x254
[C0000000DA7FFD90] [C0000000000BB5F0] .sys_read+0x54/0x9c
[C0000000DA7FFE30] [C000000000008600] syscall_exit+0x0/0x18
Instruction dump:
2faa0000 419e0188 3c004000 e97e8038 7fbfeb78 38e00000 780007c6 7c0a0214
7809f860 7808a302 78004602 79291f24 <7d69582a> 2fab0000 419e000c
78001d28

2005-12-07 22:37:31

by Keith Mannthey

Subject: Re: 2.6.15-rc4 Oops in show_smaps()

On 12/7/05, Badari Pulavarty <[email protected]> wrote:
> Hi,
>
> I am getting Oops while doing
>
> cat /proc/<pid>/smaps
>
> Known issue ?

x86_64 2.6.15-rc5 dosen't seem to have this issue.

Thanks,
Keith

2005-12-07 22:38:49

by Badari Pulavarty

Subject: Re: 2.6.15-rc4 Oops in show_smaps()

On Wed, 2005-12-07 at 14:37 -0800, Keith Mannthey wrote:
> On 12/7/05, Badari Pulavarty <[email protected]> wrote:
> > Hi,
> >
> > I am getting Oops while doing
> >
> > cat /proc/<pid>/smaps
> >
> > Known issue ?
>
> x86_64 2.6.15-rc5 dosen't seem to have this issue.

Are you using CONFIG_SPARSEMEM ?
I found that its something to do with that (not sure).

Thanks,
Badari