[parisc-linux] Unaligned access failures with apt-get on SMP K460.

Ryan Bradetich rbradetich@uswest.net
16 Jun 2002 21:37:56 -0600

Hello Jeremy,

The SMP problem is what I am trying to debug.  I am running SMP cvs head
on the J200 and the K460 and also an A500 recently thanks to the ESIEE
team.  The K460 has 4 processors which I am hoping will help to identify
the SMP problems faster, but it is also exposing new SMP problems for me
to look into :(

Hopefully we will be able to identify and fix these SMP problems, but
they do not appear to be easy and will probably take a while to fix.

Thanks for the report! and if you notice anything else odd (or
repeatable patterns) let me and/or the list know so maybe it will
provide additional insights into the problems.


- Ryan

On Sun, 2002-06-16 at 21:19, Jeremy Drake wrote:
> On 16 Jun 2002, Ryan Bradetich wrote:
> > Hello parisc-linux hackers,
> > 
> > I (with a lot of help from Richard) am  looking into a problem with
> > apt-get .... on a SMP kernel for the K460. 
> > 
> > The problem is that when I run apt-get <command> I get the following
> > error message:
> > 	apt-get(<PID>): unaligned access to 0x403ce094 at ip=0x4005e47f
> > 
> I get stuff like this on my J5000, only it locks up and/or HPMC's when it 
> does it.  (Sometimes prints HPMC info to the LCD, sometimes not, but 
> always locks up).
> I try to keep up-to-date with the cvs kernels, and I try it on SMP every 
> now and then, but I generally run this box under UP and it is very stable.  
> I started having problems with this box when the latest 2.4.17-32-smp was 
> released.  With the previous one, this box was stable under SMP.  (this 
> was before I got the courage to build my own kernels on parisc).  Not sure 
> what versions in cvs this corresponds to, but maybe some change between 
> caused the problem.
> Not sure if this is the same problem you are encountering, because Samba 
> also tends to lock this box up, and if I leave it alone, it just crashes 
> itself later...
> -- 
> Troubled day for virgins over 16 who are beautiful and wealthy and live
> in eucalyptus trees.