Re: [BUG] 2.6.3 Slab corruption: errors are triggered when memory exceeds 2.5GB (correction)

[Darren Williams]

Where we are upto:

The machine below starts producing slab corruption errors when the amount of RAM is
3GB or more.

The hardware has been check and it does not appear to be a hardware error, additional
hardware that was producing different errors was removed and the slab corruption
persisted.

The driver that seems to be triggering the error is the eepro100. And only when receiving
data, transmitting data produces no errors. 
the test was 
 send kern-image A -> B, no errors.
 send kern-image B -> A, errors.

A being the itanium

Using the alternative Intel e100 driver removes the slab corruption errors.

A small modification to 'struct skb_shared_info' that places an int before the 
'atomic_t dataref' field removes the slab corruption errors.


Darren

On Tue, 24 Feb 2004, Darren Williams wrote:

> Hi Darren
> 
> On Tue, 24 Feb 2004, Darren Williams wrote:
> 
> > 
> > On Ia64 Itanium 1 machines with more than 2.5GB of RAM the follwing error is triggered.
> >  
> > slab error in check_poison_obj(): cache `size-16384': object was modified after freeing
> > 
> > The machine that triggered the error above is an
> > 
> > i2000 HP workstation
> > 4gb RAM
> > 1gb SWAP
> > 
> > An identical machine with 3GB ram produces:
>                             ^^^
>  
> > slab error in check_poison_obj(): cache `size-2048': object was modified after freeing
> > 
> > if the amount of RAM is reduced to 2.5GB or less then the errors do not appear.
>                                      ^^^^^ 
> 
> > Kernel logs and configs can be found at:
> > http://quasar.cse.unsw.edu.au/~dsw/public-files/lemon-debug/
> > 
> > 
> > --------------------------------------------------
> > Darren Williams <dsw AT gelato.unsw.edu.au>
> > Gelato@UNSW <www.gelato.unsw.edu.au>
> > --------------------------------------------------
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> --------------------------------------------------
> Darren Williams <dsw AT gelato.unsw.edu.au>
> Gelato@UNSW <www.gelato.unsw.edu.au>
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Darren Williams <dsw AT gelato.unsw.edu.au>
Gelato@UNSW <www.gelato.unsw.edu.au>
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