On St 29-03-06 15:09:51, Ashok Raj wrote:
> On Wed, Mar 29, 2006 at 02:47:46PM -0800, Andrew Morton wrote:
> > Pavel Machek <[email protected]> wrote:
> > >
> > > HOTPLUG_CPU is needed on normal PCs, too -- it is neccessary for
> > > software suspend.
> > >
> >
> > OK, this will get ugly. APICs are involved.
>
> I guess you need only on systems that support >1 cpu right? I doubt you will need
> it on a system that cannot run with the config-generic-arch on. although we use bigsmp
> when hotplug is turned on, all we really end up is using flat physical mode instead
> of using logical mode.
>
> I still havent understood why this wont work. Choosing CONFIG_X86_GENERICARCH shouldnt
> break anything AFAICT.
If X86_GENERICARCH is not breaking anything, why does X86_PC exist? If
you say X86_GENERICARCH is okay for everyone, at least help texts need
to be fixed.
config X86_PC
bool "PC-compatible"
help
Choose this option if your computer is a standard PC or compatible.
config X86_BIGSMP
bool "Support for other sub-arch SMP systems with more than 8 CPUs"
depends on SMP
help
This option is needed for the systems that have more than 8 CPUs
and if the system is not of any sub-arch type above.
If you don't have such a system, you should say N here.
I certainly have PCtype machine here, and definitely not more than 8 CPUs.
> Pavel, you could use CONFIG_HOTPLUG_CPU, just need to enable X86_GENERICARCH now.
> Is there a reason you think that wont work? I wish we would revert it for a strong
> reason that we know will not make hotplug work on certain systems because of this choise
> not that we currently have X86_PC now, and are unwiling to change the config.
>
> (PS: the word bigsmp although sounds like some large NR_CPUS, its just using a mode that
> permits the system to work from 1 .. >8 cpus. So there is really nothing determental
> to selecting this.)
At least config texts need to be fixed if you want people to use
X86_BIGSMP. And why keep X86_PC when X86_BIGSMP works as well?
Pavel
--
Picture of sleeping (Linux) penguin wanted...
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
