On Wed, 16 Jun 2010, Andrey Y. Shevel wrote:

Hello everybody,

I just discovered in my CPU

model name      : Intel(R) Xeon(R) CPU           E5430  @ 2.66GHz

under

[r...@pcfarm-new ~]# uname -a
Linux pcfarm-new.pnpi.spb.ru 2.6.18-194.3.1.el5xen #1 SMP Fri May 7 02:05:32 EDT 2010 x86_64 x86_64 x86_64 GNU/Linux

that there is no flag 'vmx'

[r...@pcfarm-new ~]# grep vmx /proc/cpuinfo; echo $?
1

At the same time when I boot another kernel 'xen.gz-2.6.18-128.1.1.el5'
the flag 'vmx' is in place

Hmm. The flags are indeed different with xen and non-xen kernels.

I guess this is because with a xen kernel you are looking at the capabiities of the *virtual* CPU, rather than the bare metal processor ?

--
Dr. Andrew C. Aitchison         Computer Officer, DPMMS, Cambridge
[email protected]   http://www.dpmms.cam.ac.uk/~werdna

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