Messages in this thread | | | Date | Tue, 11 Jun 2002 02:27:25 -0700 | From | Andrew Morton <> | Subject | Re: [PATCH] 2.5.21 Nonlinear CPU support |
| |
Rusty Russell wrote: > > ... > Let's not perpetuate the myth that everything in the kernel needs to > be tuned to the last cycle at all costs, hm?
I was more concerned about the RAM use, actually.
This patch is an additional reason for CONFIG_NR_CPUS, but I've rather gone cold on that idea because the "proper fix" is to make all those huge per-cpu arrays dynamically allocated. So you can run a 64p kernel on 2p without losing hundreds of k of memory and kernel address space.
But it looks like all those dynamically-allocated structures would have to be allocated out to NR_CPUS anyway, to support hotplug, yes?
In which case, CONFIG_NR_CPUS is the only way to get the memory back...
- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |