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Re: [Xen-devel] RFC: large system support - 128 CPUs
| To: | Tim Deegan <Tim.Deegan@xxxxxxxxxx>, Jan Beulich <jbeulich@xxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] RFC: large system support - 128 CPUs |
| From: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
| Date: | Wed, 13 Aug 2008 09:26:26 +0100 |
| Cc: | xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Bill Burns <bburns@xxxxxxxxxx> |
| Delivery-date: | Wed, 13 Aug 2008 01:27:22 -0700 |
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| Thread-topic: | [Xen-devel] RFC: large system support - 128 CPUs |
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On 13/8/08 09:22, "Tim Deegan" <Tim.Deegan@xxxxxxxxxx> wrote: > At 09:21 +0100 on 13 Aug (1218619274), Jan Beulich wrote: >> Both seem to be hacks to get to 128 CPUs, without consideration of how >> to go beyond that > > I think the shadow_page_info one is a general fix for my implicit > assumption that sizeof(cpumask_t) == sizeof (long). Do some fields after the cpumask need to line up in both structures? Placing a dummy cpumask in the shadow_page structure might make most sense. For the other one I'll have to think a bit. The need for GDT entries per CPU currently obviously means scaling much past a few hundred CPUs is going to be difficult. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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