[parisc-linux] Problems compiling LVM

[parisc-linux] Problems compiling LVM

[Torsten Neumann]

Hi,

the linux-lvm code was inspired by the hp-ux LVM. So I thougt it would be
real cool if the linux-lvm runs under hppa-linux.
Compiling the kernel with lvm support is no problem, the userspace tools
have some problems with gcc-3 (code uses #ifdef constructs in printf macro),
but then also compiles cleanly.

Now I want to create a VG but I only got the error message
imke kernel: pvcreate(188): unaligned access to 0x40067cf3 at ip=0x400310db
imke kernel: Not-handled unaligned insn 0x48350376
from the program pvcreate.
Could somebody tell what kind of problem this is. Is it a kernel problem or
a userspace problem ?
Is there a way to avoid this problem ?

  Torsten

Re: [parisc-linux] Problems compiling LVM

[Helge Deller]

Hi Torsten,

The problem is that your userspace program tries to do a direct 16 or 32-bit 
read- or write-access to address 0x40067cf3 - which lies on a "unaligned 
address" (e.g. not a a 32-bit boundary). 
On Intel architectures this fault is automatically handled by the hardware, 
while you get an unaligned access trap on parisc.

The first parisc-kernel which should handle this trap correctly is 2.4.0-pa39 
(in CVS), so I would encourage you to update your kernel.

Greetings,
Helge

On Thursday 28 June 2001 20:29, Torsten Neumann wrote:
> Hi,
>
> the linux-lvm code was inspired by the hp-ux LVM. So I thougt it would be
> real cool if the linux-lvm runs under hppa-linux.
> Compiling the kernel with lvm support is no problem, the userspace tools
> have some problems with gcc-3 (code uses #ifdef constructs in printf
> macro), but then also compiles cleanly.
>
> Now I want to create a VG but I only got the error message
> imke kernel: pvcreate(188): unaligned access to 0x40067cf3 at ip=0x400310db
> imke kernel: Not-handled unaligned insn 0x48350376
>
> >from the program pvcreate.
>
> Could somebody tell what kind of problem this is. Is it a kernel problem or
> a userspace problem ?
> Is there a way to avoid this problem ?
>
>   Torsten

Re: [parisc-linux] Problems compiling LVM

[Torsten Neumann]

On Thu, Jun 28, 2001 at 09:36:15PM +0200, Helge Deller wrote:
> Hi Torsten,

[ unaligned access problem ]
> 
> The problem is that your userspace program tries to do a direct 16 or 32-bit 
> read- or write-access to address 0x40067cf3 - which lies on a "unaligned 
> address" (e.g. not a a 32-bit boundary). 
> On Intel architectures this fault is automatically handled by the hardware, 
> while you get an unaligned access trap on parisc.
> 
> The first parisc-kernel which should handle this trap correctly is 2.4.0-pa39 
> (in CVS), so I would encourage you to update your kernel.

This was with kernel
Linux imke 2.4.0-pa43 #2 Wed Jun 27 20:09:41 CEST 2001 parisc unknown

Any Hints ?
Or could somebody tell me what more info is needed to solve the problem ?

  Torsten

Re: [parisc-linux] Problems compiling LVM

[Randolph Chung]

> This was with kernel
> Linux imke 2.4.0-pa43 #2 Wed Jun 27 20:09:41 CEST 2001 parisc unknown
> 
> Any Hints ?
> Or could somebody tell me what more info is needed to solve the problem ?

Torsten, can you send me (not to the list pls) the binary that causes the
trap? I'll take a look. The unaligned trap only handles the common
load/store instructures on unaligned boundaries. Looks like your
application is using one of the (currently) unsupported instructions.

randolph
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