Re: [PATCH 3 of 4] sparsemem: reduce i386 PAE section size
From: Jeremy Fitzhardinge
Date: Fri Mar 28 2008 - 14:06:00 EST
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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