Re: 2.6.18-rc3-git3 - XFS - BUG: unable to handle kernel NULL pointer dereference at virtual address 00000078

["Tony.Ho" <linux@idccenter.cn>]

I'm sorry about prev mail. I test on a wrong kernel.
The panic is not appear again, but random delete performance looks very bad.

Version  1.03       ------Sequential Output------ --Sequential Input- 
--Random-
                   -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- 
--Seeks--
Machine        Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP  
/sec %CP
test           4G 50317  99 232444  54 109507  25 52287  98 329821  29  
1169   2
                   ------Sequential Create------ --------Random 
Create--------
                   -Create-- --Read--- -Delete-- -Create-- --Read--- 
-Delete--
             files  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP  
/sec %CP
                16   104   1 +++++ +++    87   1   103   1 +++++ +++   
100   1
test,4G,50317,99,232444,54,109507,25,52287,98,329821,29,1169.4,2,16,104,1,+++++,+++,87,1,103,1,+++++,+++,100,1


Tony.Ho wrote:
> I'vs tested this patch, but the XFS panic is also reproducible, error 
> message is same as before.
>
>
> Nathan Scott wrote:
> > On Fri, Aug 04, 2006 at 10:22:21AM +0200, Jesper Juhl wrote:
> >  
> > > I just hit a BUG that looks XFS related.
> > >
> > > The machine is running 2.6.18-rc3-git3
> > >
> > > (more info below the BUG messages)
> > >
> > >     
> >
> > Thanks for reporting, Jesper - is it reproducible?  Could you try this
> > patch for me?  We had a couple of other reports of this, but the earlier
> > reporters have vanished ... could you let me know if this helps?
> >
> > cheers.
> >
> >   
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