Re: Request for help: unaligned trap

[Uwe Schindler <uwe@thetaphi.de>]

This type of messages is nothing bad on alpha. The problem is here that the 
clamd program tries to access variables that are not proper aligned (can 
happen in a struct). Alpha CPU for example cannot read 32 bit values that 
are not aligned at a 4 byte boundary or similar things with other 
datatypes. The kernel fixes this by doing some workaround read/writes and 
prints this message.
The only problem with this: it is very slow, programs that have this 
problems very often, run very slowly.

This happens often when programming in C++ as I know.

 At 04:43 12.04.2005, Stephen Gran wrote:
> Hello all,
>
> Could somebody please take a look at
> http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=289187
> ?
>
> The gist of the report is that the kernel is reporting unaligned trap
> problem with clamd.  Beyond getting the idea that this is probably a
> sizeof() problem or similar, I am not sure hw to proceed.
>
> It appears alpha specific, and I don't have any experience with alpha
> issues at all.  Upstream is very willing to help, and offered to debug
> it themselves, but they have no alpha access.  The submitter is
> understandably not very keen on giving testbed access to a production
> machine.
>
> I appreciate anything anyone can do, and look forward to your comments.
> Please cc me, as I am not subscribed.
>
> Thanks,
> --
>  -----------------------------------------------------------------
> |   ,''`.                                            Stephen Gran |
> |  : :' :                                       sgran@debian.org |
> |  `. `'                        Debian user, admin, and developer |
> |    `-                                     http://www.debian.org |
>  -----------------------------------------------------------------

-----
Uwe Schindler
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