[parisc-linux] Re: [parisc-linux-cvs] linux-2.6 deller

[Joel Soete]

Hello Helge,

> On Tuesday 28 March 2006 18:08, Joel Soete wrote:
> > > What does people here think about making the c3000_defconfig a 64bit Kernel
> > by default (now, since 64bit Kernels work even with graphics) ?
> > > (It's currently still 32bit)
> > > 
> > If you think that this pb
> > <http://lists.parisc-linux.org/pipermail/parisc-linux/2006-March/028603.html>
> > is now fixed in pa8 ok ;<?
> 
> I never saw this specific "soft lockup", but instead soft lockups only for
"get_console_sem" (or similiar).
> 
> > (the only system 32 and 64 bit capable I have to test is a b2k, iirc a
> > brotherhood of c3k. On this, the 32bit kernel seems to quiet stable but 64bit
> > still exposes such kind of pb ;<(. Unfortunately the n4k is only 64bit capable
> > and on this I experiment the same pb even after some 2/3 days of kernel build
> > loop. Finaly to say, _imho_, that's may be still to early to put 64bit as
> > default build for those model? )
> 
> I don't agree here with you.
> The soft lockup aren't serious. 
> You can easily disable this "debugging feature" (CONFIG_DEBUG_*), and I saw
the soft lockups on bot 32 and 64bit kernels.

Ah, interesting: so you experiment same kind of message on 32bit kernel too?
But did it make hanging your system as it made for me on 64bit kernel?

That said, some time ago I disabled all debugging feature (iirc because of sad
loop in DEBUG_SLAB, btw tausq is it fixed now?) but that just removed "BUG()
..." message and the system still exposed various hang at various places
(according to piminfo analyse). That was obviously an old pb (2.6.12-rc1 ;-)),
anyway that experience let me a bit septic.   

> So, IMHO this isn't a real reason not to enable 64bit by default, but I
agree, that it should be fixed nevertheless.
> 
Eventhough it wasn't a default, I frequently test it ;-) (As far as time allow
me, I build and test the 2 kernels and reports pb is neccessary)

Thanks,
    Joel

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