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SubjectRe: [PATCH 3 of 4] sparsemem: reduce i386 PAE section size
Dave Hansen wrote:
>
> Developers should probably learn the tradeoffs before they go start
> poking around in code and sending patches. ;)
>

I don't know any better way of learning the tradeoffs than by poking
around and sending patches ;)

> BTW, the current 1G sections were picked because all the hardware we
> knew of at the time had 512MB dimms that had to be added in pairs. So,
> we didn't ever have physical hotplug of less than that.
>

I guessed it was something like that. Even for my case 1G isn't too
bad. It was bad when I was trying to hotplug early and it was having
allocation failures in the bootmem allocator, but I think it should be
OK now. On the other hand, when you're hotplugging new memory is
precisely when you don't want to be allocating lots of new memory...

J


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