RE: kernel error

Castelijn, Maurice (Castelijn.Maurice@kpmg.nl)
Thu, 31 Oct 1996 12:05:30 +0100

>----------
>From: Martin Radford[SMTP:M.P.Radford@exeter.ac.uk]
>Sent: donderdag 31 oktober 1996 12:11
>To: axp-list@redhat.com
>Subject: Re: kernel error
>
>>
>>"Cannot change to /var/spool/at/: Permission denied" <-- CRAP. it's on
>>-rwx------, should be ok.
>
>I get these too. I ended up disabling the at command (it runs from
>cron, so edit /etc/crontab) - quick and dirty, but I'd still like to
>know what causes this.

Well, I know what at is for. That it runs an at command every minute. So
that you can start a process from a specific time... But, yes, it's a
solution and quick & dirty. I'd like to know if there's anyone else who
might have an ideas what's causing these errors. Does there need to be a
file in the /var/spool/at directory? There is a ".lockfile" and a
"spool" directory.
>
>>
>>things like when I try to mail (not even compile!):
>>
>>mail(246): unaligned trap at fffffc0000342028
>>mail(246): unaligned trap at <same address>
>>and that for about 4 times... at least.
>>
>>Is this something that has got to do with hardware conflicts/problems?
>>Or is this 'normal'?
>
>No this is "normal". The Alpha architecture needs to store things on
>different boundaries, so a 32-bit value needs to be stored on a
>4-byte boundary, etc. The processor traps if you try to break this
>rule. The kernel catches the trap, gives the error message you see,
>and then emulates the instruction in such a way as to keep the
>hardware happy. Trouble is that this is slow.

Hmm, I couldn't be more happy to know this is a normal thing. *ahem*...
I wouldn't really mind if the errors are put in the logfile, but I get
it on screen too! Is there any fix to this?
>
>>I've never had this in other versions of Linux before (Slackware) ...
>>so, don't know what this is.
>
>It's alpha-specific (or at least the problem doesn't exist on the ix86
>processor line).

I'm getting used to the Alpha, but sometimes I feel like grabbing a
hammer........

Thanks for your reply,

Maurice.

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