Re: 2.4.1-pre8 losing pages

[Peter Horton]

On Fri, Jan 26, 2001 at 09:24:12AM +0000, Peter Horton wrote:
> On Fri, Jan 26, 2001 at 03:20:33AM +0100, Xuan Baldauf wrote:
> > 
> > Peter Horton wrote:
> > 
> > > I'm experiencing repeatable corruption whilst writing large volumes of
> > > data to disk. Kernel version is 2.4.1-pre8, on an 850MHz AMD Athlon on an
> > > ASUS A7V (VIA KT133 chipset) motherboard 128M RAM (tested with 'memtest86'
> > > for 10 hours).
> > >
> > 
> 
> ... this is the kinda output I get on most runs :-
> 
>    Linux mole-rat 2.4.1-pre10 #1 Fri Jan 26 08:48:55 GMT 2001 i686 unknown
>    ...
>    aa6a64589748321899bab2b66f71427f  testt
>    aa6a64589748321899bab2b66f71427f  testu
>    aa6a64589748321899bab2b66f71427f  testv
>    9dde1bed276e32a1f9af98c87ab05978  testw
>    aa6a64589748321899bab2b66f71427f  testx
>    aa6a64589748321899bab2b66f71427f  testy
>    aa6a64589748321899bab2b66f71427f  testz
>    mole-rat:~# cmp testw testx
>    testw testx differ: char 110862337, line 433772
>    mole-rat:~# cmp -i $(( 110862336 + 4096 )) testw testx
>    mole-rat:~# echo $(( 110862336 % 4096 ))
>    0
> 
> > 
> > I cannot reproduce your behaviour in 2.4.1-pre9.
> > 
> 

The corruption is dependent on having a swapped on swap partition. If I
"swapoff" the corruption goes away, but it comes back when I "swapon"
again. I feel this a kernel bug, but as I'm the only person out here who's
seeing it I'm at a loss ...

P.