[Xen-devel] [PATCH 2/2] xend: fix vcpu related items

[Ryan Harper <ryanh@xxxxxxxxxx>]

This patch fixes dom0 SMP vcpu hotplug.  Currently, domains without
config files (e.g. dom0) don't set info['vcpus'] correctly resulting in
incorrect cpu availablity values in the store.  This prevents hotplug
from functioning.

-- 
Ryan Harper
Software Engineer; Linux Technology Center
IBM Corp., Austin, Tx
(512) 838-9253   T/L: 678-9253
ryanh@xxxxxxxxxx


diffstat output:
 XendDomainInfo.py |   15 +++++++++++----
 1 files changed, 11 insertions(+), 4 deletions(-)

Signed-off-by: Ryan Harper <ryanh@xxxxxxxxxx>
---
diff -r 46f4f1eb70ca tools/python/xen/xend/XendDomainInfo.py
--- a/tools/python/xen/xend/XendDomainInfo.py   Fri Nov  4 21:27:11 2005
+++ b/tools/python/xen/xend/XendDomainInfo.py   Fri Nov  4 16:13:22 2005
@@ -425,13 +425,20 @@
             defaultInfo('on_crash',     lambda: "restart")
             defaultInfo('cpu',          lambda: None)
             defaultInfo('cpu_weight',   lambda: 1.0)
-            defaultInfo('vcpus',        lambda: int(1))
+
+            # some domains don't have a config file (e.g. dom0 )
+            # to set number of vcpus so we derive available cpus
+            # from max_vcpu_id which is present for running domains.
+            if not self.infoIsSet('vcpus') and self.infoIsSet('max_vcpu_id'):
+                avail = int(self.info['max_vcpu_id'])+1
+            else:
+                avail = int(1)
+
+            defaultInfo('vcpus',        lambda: avail)
             defaultInfo('online_vcpus', lambda: self.info['vcpus'])
-
-            self.info['vcpus'] = int(self.info['vcpus'])
             defaultInfo('max_vcpu_id',  lambda: self.info['vcpus']-1)
-
             defaultInfo('vcpu_avail',   lambda: (1 << self.info['vcpus']) - 1)
+
             defaultInfo('bootloader',   lambda: None)
             defaultInfo('backend',      lambda: [])
             defaultInfo('device',       lambda: [])

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