Re: CONFIG_MK6 = lsof hangs unkillable

[Tony Mantler]

On 20-Jan-06, at 4:41 PM, Andrew Morton wrote:

> Adrian Bunk <bunk@xxxxxxxxx> wrote:
> > On Fri, Jan 20, 2006 at 04:44:07AM -0800, Andrew Morton wrote:
> > > Tony Mantler <nicoya@xxxxxx> wrote:
> > > > I'm having trouble running lsof on 2.6.15.1 when the kernel is
> > > > compiled with CONFIG_MK6. When run as root, lsof will segfault, and
> > > > when run as a user lsof will hang unkillable.
> > > >
> > > > The same kernel, same machine, but compiled with CONFIG_MK7 runs  
> > > > just
> > > > lsof just fine.
> > >
> > > That's creepy.  CONFIG_MK6 hardly does anything.  The main thing  
> > > it does is
> > > feed `-march=k6' into the compiler.  MK7 uses `-march=athlon'.
> > > ...
> >
> > CONFIG_MK7 results in a bigger L1_CACHE_SHIFT than CONFIG_MK6.
> >
> > AFAIR it wouldn't be the first time that changing L1_CACHE_SHIFT  
> > would
> > hide a real bug visible with a different L1_CACHE_SHIFT.
>
> hm, OK.  Well that's something we can ask Tony to eliminate, by  
> patching
> his Kconfig.cpu to make CONFIG_MK6 have the larger L1_CACHE_SHIFT  
> (and/or
> vice versa).

Just tested that a few seconds ago, actually.

CONFIG_MK6 with CONFIG_L1_CACHE_SHIFT=6 results in the same crash.

I'm going to twiddle the configs again and see if I can make a  
CONFIG_MK7 kernel with -march=k6


Cheers - Tony 'Nicoya' Mantler :)

--
Tony 'Nicoya' Mantler -- Master of Code-fu -- nicoya@xxxxxx
--  http://nicoya.feline.pp.se/  --  http://www.ubb.ca/  --

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