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Re: [Xen-devel] Daily Xen Builds

On Fri, 2005-07-08 at 10:12 -0500, David F Barrera wrote:
> July 6, 2005 using latest HG pull
>       * Latest changeset:
>         5699:eef23f57f20e931a75481c2e2bce05cf2e9a19c6
>         tag:         tip
>         user:        kaf24@xxxxxxxxxxxxxxxxxxxx
>         date:        Fri Jul  8 04:06:04 2005
>         summary:     The attached patch adds a new dom0_op,
>       * x86 
>               * SLES 9/SP1, RHEL 4 and FC3 on IBM xSeries 305, 235, and
>                 IBM ThinkCentre 
>                       * Builds and boots without problems
>                       * Able to create functional domains 
>                       * Running LTP test suite on Dom0s and DomU
>       * x86_64 EMT64 
>                       * BUILD BREAK on GCC 4.0 (FC4)
>                               * Build still broken
>                               * x86 Build break -
>                                 include/linux/i2c.h:58: error: array
>                                 type has incomplete element type
>                               * Bugzilla #92 
>                       * GCC 3.3 (SLES 9/SP1)
>                               * Builds and boots without problems
>                               * Able to boot Dom0 after disabling the NX
>                                 bit at the BIOS level. 

David just so you know actually you are "enabling" the CPU to understand
the NX bit at the bios level. The name of the option is a little
misleading if you don't know exactly what it does. The wording "Execute
Disable Bit" actually means cut CPU support for the NX bit ...which job
is to disable execution on pages that should not be executed. In this
instance when you cut it on you are telling the CPU to understand
it...the Operating system has to then tell CPU to enforce the bit or
not. So really this option should be on by default ... since it does not
cause any harm. 

>                               * Thanks to Jerone Young for looking into
>                                 it.
>                               * Will setup DomUs today on x86_64
>                                 machines.
Jerone Young
IBM Linux Technology Center
512-838-1157 (T/L: 678-1157)

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