Hi,
On Wed, 6 Apr 2005, Dave Hansen wrote:
> > Why is this choice needed at all? Why would one choose SPARSEMEM over
> > DISCONTIGMEM?
>
> For now, it's only so people can test either one, and we don't have to
> try to toss DICONTIGMEM out of the kernel in fell swoop. When the
> memory hotplug options are enabled, the DISCONTIG option goes away, and
> SPARSEMEM is selected as the only option.
>
> I hope to, in the future, make the options more like this:
>
> config MEMORY_HOTPLUG...
> config NUMA...
>
> config DISCONTIGMEM
> depends on NUMA && !MEMORY_HOTPLUG
>
> config SPARSEMEM
> depends on MEMORY_HOTPLUG || OTHER_ARCH_THING
>
> config FLATMEM
> depends on !DISCONTIGMEM && !SPARSEMEM
I was hoping for this too, in the meantime can't you simply make it a
suboption of DISCONTIGMEM? So an extra option is only visible when it's
enabled and most people can ignore it completely by just disabling a
single option.
> > Help texts such as "If unsure, choose <something else>" make
> > the complete config option pretty useless.
>
> They don't make it useless, they just guide a clueless user to the right
> place, without them having to think about it at all. Those of us that
> need to test the various configurations are quite sure of what we're
> doing, and can ignore the messages. :)
>
> I'm not opposed to creating some better help text for those things, I'm
> just not sure that we really need it, or that it will help end users get
> to the right place. I guess more explanation never hurt anyone.
Some basic explanation with a link for more information can't hurt.
bye, Roman
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