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Re: [Xen-devel] [PATCH] Enlarge default NR_CPUS to 64 for x86_64
| To: | "Wei, Gang" <gang.wei@xxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] [PATCH] Enlarge default NR_CPUS to 64 for x86_64 |
| From: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
| Date: | Fri, 07 Aug 2009 17:18:23 +0100 |
| Cc: | |
| Delivery-date: | Fri, 07 Aug 2009 09:19:25 -0700 |
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| Thread-topic: | [Xen-devel] [PATCH] Enlarge default NR_CPUS to 64 for x86_64 |
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On 07/08/2009 15:59, "Wei, Gang" <gang.wei@xxxxxxxxx> wrote: > Not sure about whether we can raise it for i386 too. I am a little confused by > below lines in config.h: > > #ifdef __i386__ > #if NR_CPUS > 32 > #error "Maximum of 32 physical processors supported by Xen on x86_32" > #endif > /* Maximum number of virtual CPUs in multi-processor guests. */ > #define MAX_VIRT_CPUS XEN_LEGACY_MAX_VCPUS > #endif > > I don't know why this compiling time error was put here for i386 yet. Any body > know it? I think it's a hangover from when there was a cpumask_t inside struct page_info. That structure had to be fixed size for i386 to fit in the hypervisor's virtual memory footprint. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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