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ubuntu 12.04 egrep -c '(vmx/svm)' /proc/cpuinfo = 0

Posted on 2013-01-24
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Last Modified: 2013-01-25
Hi guys

wierd I have a 2 * cpu xeon 5520 server with 32gb ram it was a whitebox esx host I am investigating linux (ubuntu 12.04) for kvm following a guide to check virtualization and obviously as it worked with v5 and v5.1 esx it was, but with ubuntu 12.04 I run egrep -c '(vmx/svm)' /proc/cpuinfo = 0 that indicates no virtualization and that's not correct it is enablled in the bios

help !
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Question by:IanTh
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woolmilkporc earned 500 total points
ID: 38814712
Shouldn't it be a pipe instead of a slash?

egrep -c '(vmx|svm)' /proc/cpuinfo
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by:IanTh
ID: 38814786
eh no I copied it from the guide I was following it said I should get a non zero I get 0
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by:IanTh
ID: 38814807
yes it was I now get 16
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by:woolmilkporc
ID: 38814809
The pipe symbol in the regular expression means "or", whereas the slash is nothing but the character "/".

So since there isn't the string "vmx/svm" anywhere in /proc/cpuinfo, but "vmx" or "svm" are,  I'm sure that your guide is wrong.

Here is a link to another howto which uses the pipe.

http://mikebeach.org/2011/09/23/how-to-tell-if-your-cpu-supports-virtualization-under-ubuntu-linux/
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by:IanTh
ID: 38815012
I know I just copied it off a web site any happy now I have 16 which is correct by the way my server also has vt-d does kvm use that or just vt-x
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by:woolmilkporc
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