From mboxrd@z Thu Jan  1 00:00:00 1970
From: =?ISO-8859-1?Q?BERTRAND_Jo=EBl?= <joel.bertrand@systella.fr>
Date: Sun, 26 Nov 2006 09:22:07 +0000
Subject: Re: Sparc32 SMP
Message-Id: <45695CBF.4060600@systella.fr>
List-Id: <sparclinux.vger.kernel.org>
References: <Pine.LNX.4.10.10607130208320.4657-300000@coalcreekmill.cm.com>
In-Reply-To: <Pine.LNX.4.10.10607130208320.4657-300000@coalcreekmill.cm.com>
MIME-Version: 1.0
Content-Type: text/plain; charset="iso-8859-1"
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To: sparclinux@vger.kernel.org

BERTRAND Jo=EBl a =E9crit :
>     Hello,
>=20
>     This Oops is reproductible. I have decoded the Oops:
>=20
> No modules in ksyms, skipping objects
> No ksyms, skipping lsmod
> Nov 23 14:26:47 hilbert kernel: Unable to handle kernel NULL pointer=20
> dereference
> Nov 23 14:26:48 hilbert kernel: tsk->{mm,active_mm}->context =3D 00005058
> Nov 23 14:26:48 hilbert kernel: tsk->{mm,active_mm}->pgd =3D fc12d000
> Nov 23 14:26:48 hilbert kernel:               \|/ ____ \|/
> Nov 23 14:26:48 hilbert kernel:               "@'/ ,. \`@"
> Nov 23 14:26:48 hilbert kernel:               /_| \__/ |_\
> Nov 23 14:26:48 hilbert kernel:                  \__U_/
> Nov 23 14:26:48 hilbert kernel: tar(13387): Oops [#1]
> Nov 23 14:26:48 hilbert kernel: PSR: 400000c2 PC: f008bd8c NPC: f008bd90 =

> Y: 00000000    Not tainted
> Using defaults from ksymoops -t elf32-sparc -a sparc
> Nov 23 14:26:48 hilbert kernel: PC: <pipe_readv+0xac/0x440>
> Nov 23 14:26:48 hilbert kernel: Caller[f008c140]: pipe_read+0x20/0x28
> Nov 23 14:26:48 hilbert kernel: Caller[f007dee8]: vfs_read+0xa0/0x16c
> Nov 23 14:26:48 hilbert kernel: Caller[f007eb38]: sys_read+0x38/0x64
> Nov 23 14:26:48 hilbert kernel: Caller[f0015a3c]:=20
> syscall_is_too_hard+0x3c/0x40
> Nov 23 14:26:48 hilbert kernel: Caller[0003df90]: 0x3df98
> Nov 23 14:26:49 hilbert kernel: Instruction DUMP: 1a800003  fa04a00c=20
> a810001b <c207600c> 90100013  9fc04000  92100012  80a22000  128000b9
>=20
>=20
>  >>PC;  f008bd8c <pipe_readv+2f8/4d4>   <=3D=3D>=20
> Trace; f008c140 <do_pipe+158/28c>
> Trace; f007dee8 <vfs_readv+6c/70>
> Trace; f007eb38 <__fput+8c/1b0>
> Trace; f0015a3c <linux_sparc_syscall+0/18>
> Trace; 0003df90 Before first symbol
>=20
> Code;  f008bd80 <pipe_readv+2ec/4d4>
> 00000000 <_PC>:
> Code;  f008bd80 <pipe_readv+2ec/4d4>
>    0:   1a 80 00 03       bcc  c <_PC+0xc>
> Code;  f008bd84 <pipe_readv+2f0/4d4>
>    4:   fa 04 a0 0c       ld  [ %l2 + 0xc ], %i5
> Code;  f008bd88 <pipe_readv+2f4/4d4>
>    8:   a8 10 00 1b       mov  %i3, %l4
> Code;  f008bd8c <pipe_readv+2f8/4d4>   <=3D=3D>    c:   c2 07 60 0c      =
 ld  [ %i5 + 0xc ], %g1   <=3D=3D> Code;  f008bd90 <pipe_readv+2fc/4d4>
>   10:   90 10 00 13       mov  %l3, %o0
> Code;  f008bd94 <pipe_readv+300/4d4>
>   14:   9f c0 40 00       call  %g1
> Code;  f008bd98 <pipe_readv+304/4d4>
>   18:   92 10 00 12       mov  %l2, %o1
> Code;  f008bd9c <pipe_readv+308/4d4>
>   1c:   80 a2 20 00       cmp  %o0, 0
> Code;  f008bda0 <pipe_readv+30c/4d4>
>   20:   12 80 00 b9       bne  304 <_PC+0x304>
> Code;  f008bda4 <pipe_readv+310/4d4>
>   24:   00 00 00 00       unimp  0

	Some news : only occurs with SMP workstation with or without HIGHMEM=20
support.

	Regards,

	JKB