PROBLEM with raid5 and 2.4.0 kernel

PROBLEM with raid5 and 2.4.0 kernel

[Jeff Forbes]

I have been trying out the new 2.4.0 kernel and am unable to get
raid5 to work. When I install the raid5 module with
modprobe raid5
I get a segmentation fault and the following error appears in the dmesg output:

raid5: measuring checksumming speed
    8regs     :   806.577 MB/sec
    32regs    :   548.259 MB/sec
invalid operand: 0000
CPU:    0
EIP:    0010:[<d4862b09>]
EFLAGS: 00010206
eax: d240fe88   ebx: d23f2f40   ecx: 0000000f   edx: 8005003b
esi: d23f0000   edi: 0001720a   ebp: 00000000   esp: d240fe80
ds: 0018   es: 0018   ss: 0018
Process modprobe (pid: 748, stackpage=d240f000)
Stack: 00000000 00000000 00000020 c0113cba 0000059f 000010dd 00017209 00000005
        c0257424 00000286 00000001 c0257423 c0257403 00000020 d4864090 
d4864434
        d486442d 00000224 d4864004 00000f40 d23f0000 d23f2f40 d23f0000 
d23f2f40
Call Trace: [<c0113cba>] [<d4864090>] [<d4864434>] [<d486442d>] 
[<d4864004>] [<d4862aec>] [<d48640fc>]
        [<d4864674>] [<d4864117>] [<d486463c>] [<d4862000>] [<d486409c>] 
[<c012a0ca>] [<d4862000>] [<c01149a8>]
        [<d484f000>] [<d4862060>] [<c0108d7f>]

Code: 0f 11 00 0f 11 48 10 0f 11 50 20 0f 11 58 30 0f 18 4e 00 0f

when I modprobe raid5 again no errors are reported and dmesg has the following

md driver 0.90.0 MAX_MD_DEVS=256, MD_SB_DISKS=27
md.c: sizeof(mdp_super_t) = 4096
raid5 personality registered

Of course raid5 cannot be compiled into the kernel since it also gives the 
same error as above and dies.

Any ideas?


Jeffrey Forbes, Ph.D.
http://www.stellarhost.com

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Re: PROBLEM with raid5 and 2.4.0 kernel

[Scott Laird]

It works if you compile the kernel with the processor type set to Pentium
II or higher, or disable RAID5.  I've been meaning to report this one, but
2.4.0 was released before I had time to test the last prerelease, and I
haven't had time to test the final release yet.


Scott

On Sun, 7 Jan 2001, Jeff Forbes wrote:

> I have been trying out the new 2.4.0 kernel and am unable to get
> raid5 to work. When I install the raid5 module with
> modprobe raid5
> I get a segmentation fault and the following error appears in the dmesg output:
> 
> raid5: measuring checksumming speed
>     8regs     :   806.577 MB/sec
>     32regs    :   548.259 MB/sec
> invalid operand: 0000
> CPU:    0
> EIP:    0010:[<d4862b09>]
> EFLAGS: 00010206
> eax: d240fe88   ebx: d23f2f40   ecx: 0000000f   edx: 8005003b
> esi: d23f0000   edi: 0001720a   ebp: 00000000   esp: d240fe80
> ds: 0018   es: 0018   ss: 0018
> Process modprobe (pid: 748, stackpage=d240f000)
> Stack: 00000000 00000000 00000020 c0113cba 0000059f 000010dd 00017209 00000005
>         c0257424 00000286 00000001 c0257423 c0257403 00000020 d4864090 
> d4864434
>         d486442d 00000224 d4864004 00000f40 d23f0000 d23f2f40 d23f0000 
> d23f2f40
> Call Trace: [<c0113cba>] [<d4864090>] [<d4864434>] [<d486442d>] 
> [<d4864004>] [<d4862aec>] [<d48640fc>]
>         [<d4864674>] [<d4864117>] [<d486463c>] [<d4862000>] [<d486409c>] 
> [<c012a0ca>] [<d4862000>] [<c01149a8>]
>         [<d484f000>] [<d4862060>] [<c0108d7f>]
> 
> Code: 0f 11 00 0f 11 48 10 0f 11 50 20 0f 11 58 30 0f 18 4e 00 0f
> 
> when I modprobe raid5 again no errors are reported and dmesg has the following
> 
> md driver 0.90.0 MAX_MD_DEVS=256, MD_SB_DISKS=27
> md.c: sizeof(mdp_super_t) = 4096
> raid5 personality registered
> 
> Of course raid5 cannot be compiled into the kernel since it also gives the 
> same error as above and dies.
> 
> Any ideas?
> 
> 
> Jeffrey Forbes, Ph.D.
> http://www.stellarhost.com
> 
> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@vger.kernel.org
> Please read the FAQ at http://www.tux.org/lkml/
> 
> 

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Re: PROBLEM with raid5 and 2.4.0 kernel

[Jeff Forbes]

Sure enough, when I changed the processor type from
Pentium-Pro/Celeron/Pentium-II
to
Pentium-III
(which is the type of processor in the machine) it works.


At 08:43 AM 01/07/2001 -0800, Scott Laird wrote:

>It works if you compile the kernel with the processor type set to Pentium
>II or higher, or disable RAID5.  I've been meaning to report this one, but
>2.4.0 was released before I had time to test the last prerelease, and I
>haven't had time to test the final release yet.

Jeffrey Forbes, Ph.D.
http://www.stellarhost.com

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