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[Xen-devel] Maximum number of vcpus for HVM?

To: xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>
From: Juergen Gross <jgross@xxxxxxxx>
Date: Wed, 2 Nov 2016 10:36:01 +0100
Cc: Wei Liu <wei.liu2@xxxxxxxxxx>, Jan Beulich <JBeulich@xxxxxxxx>
Delivery-date: Wed, 02 Nov 2016 09:36:17 +0000
List-id: Xen developer discussion <xen-devel.lists.xen.org>

According to

https://wiki.xenproject.org/wiki/Xen_Project_Release_Features

HVM guests can have up to 256 vcpus. The definition in

include/public/hvm/hvm_info_table.h:

/* Maximum we can support with current vLAPIC ID mapping. */
#define HVM_MAX_VCPUS        128

and its usage in domain_max_vcpus(d) suggests the limit is 128.
I guess we should update the wiki page?


Juergen

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