BTW, I posted a fix for a bug in the 2.6 page table attribute
settings for PPC440 that cause corruption when swapping.  I 
don't know if is the same for 2.4.

http://patchwork.ozlabs.org/linuxppc/patch?id=1458

-Geoff

Bogdan Antonovici wrote:

Dan,
 
It hasn't crashed since i corrected that pointer initialization in
driver. You were right.
Thank you.
Bogdan

----- Original Message ----- 
From: Dan Malek <mailto:dan@embeddededge.com>  
To: bogdan antonovici <mailto:bantonovici@priority.mb.ca>  
Cc: linuxppc-dev <mailto:linuxppc-dev@ozlabs.org>  ;
linuxppc-embedded@ozlabs.org <mailto:linuxppc-embedded@ozlabs.org>  ;
ppckernel <mailto:ppckernel@ppckernel.org>  
Sent: Thursday, July 21, 2005 12:59 PM
Subject: Re: swap_dup: Bad swap file entry 00480020


On Jul 21, 2005, at 11:29 AM, bogdan antonovici wrote:

quoted

At the time of swap messages i was running a proprietary driver, my
application and few daemons.

Looks like your driver may have written over some of the page
tables in the kernel space.

quoted

I look on the net for some clues but it's quite confusing, i noticed
many emails on swap_dup/swap_free error messages but i couldn't figure
out what should i search for.

Those messages are likely due to a bug with swapping to disk
that has been in some 2.4 kernels, but I don't believe that is
the case here, since you don't have a disk or swapping enabled.


-- Dan





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