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[Xen-bugs] [Bug 327] New: xenstat: xentop fails when querying vpcu infor

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Subject: [Xen-bugs] [Bug 327] New: xenstat: xentop fails when querying vpcu information
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Date: Fri, 14 Oct 2005 17:14:52 +0000
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           Summary: xenstat: xentop fails when querying vpcu information
           Product: Xen
           Version: unstable
          Platform: All
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Tools
        AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
        ReportedBy: dsteklof@xxxxxxxxxx
                CC: hohnbaum@xxxxxxxxxx

changeset:   7369:92c6021f23e4

xentop/libxenstat fails when getting vcpu information. 

I got the following message:
Failed to retrieve statistics from libxenstat

libxenstat doesn't check to see if a vcpu is valid or not before calling
DOM0_GETVCPUCONTEXT. It gets the number of vcpus from dominfo and then makes a
call for each one. DOM0_GETVCPUCONTEXT returns the next valid vpcu info or an
error if a valid vcpu isn't found. Libxenstat doesn't check. 

Libxenstat needs to only call DOM0_GETVCPUCONTEXT for valid vcpus. It needs to
check the vcpu_to_cpu map before making the call.

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