[parisc-linux] JFS on PA-RISC-Linux

Matthew Wilcox willy@debian.org
Tue, 3 Jul 2001 16:15:09 +0100

On Tue, Jul 03, 2001 at 12:51:27PM +0200, Peter Weilbacher wrote:
> 	<4>mkfs.jfs(379): unaligned access to 0x00035245 at ip=0x000137af
> 	Not-handled unaligned insn 0x4a740108
> 	Unaligned handler failed, ret = -1
> (optionally without <4> or with Bus error)
> Is it JFS's fault or that of the PA-RISC-Linux port? The messages do
> not seem to be from mkfs.jfs, as I did not find anything like that
> in its source. Is it too early to try things like this?

It's the fault of both, really.  The userspace program is attempting to do
an unaligned access.  say, loading an int from a non-word-aligned address.
Most CPUs can't handle this and take a fault.  We haven't yet implemented
a trap handler for that fault.

Or rather, tausq has implemented one, but hasn't activated it yet,
I believe.... tausq?

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