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

[Randolph Chung]

Helge Deller wrote:
> On Tuesday 28 March 2006 20:11, John David Anglin 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)
>> It was always the rule that you didn't want to use a 64bit kernel on
>> machines that support 32 and 64bit kernels unless the machine has more
>> than ~ 4GB of memory.  Generally, 32bit code performs better.
>>
>> I also think we still have some issues with respect to get_user and
>> put_user in transferring longs and pointers.  Using a 64bit kernel on
>> a workstation might expose more of these issues.
> 
> Yes maybe. 
> But I didn't faced any problems so far....

I am still confused about why/how 64-bit loadable kernel modules work.
It seems to me that if they work, they are only working by accident.
OTOH with 64-bit kernels we don't have the problem with very big modules
not being able to reach their branch targets (e.g. ipv6, xfs)

randolph
-- 
Randolph Chung
Debian GNU/Linux Developer, hppa/ia64 ports
http://www.tausq.org/