Messages in this thread | | | Date | Wed, 26 Mar 2008 08:59:37 -0700 | From | Mike Travis <> | Subject | Re: [PATCH 0/2] NR_CPUS: increase maximum NR_CPUS to 4096 |
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Ingo Molnar wrote: > * Mike Travis <travis@sgi.com> wrote: > >> Increases the limit of NR_CPUS to 4096 and introduces a boolean called >> "MAXSMP" which when set (e.g. "allyesconfig") will set NR_CPUS = 4096 >> and NODES_SHIFT = 9 (512). >> >> I've been running this config (4k NR_CPUS, 512 Max Nodes) on an AMD >> box with 2 dual-cores and 4gb memory. I've also successfully booted >> it in a simulated 2cpus/1Gb environment. > > cool! > > this depends on the cpumask changes to work correctly (i.e. to boot at > all), right? > > Ingo
Yes, it overflows the stack quite quickly without the cpumask changes. I didn't do any testing to see what's the minimal set of changes.
Thanks, Mike
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