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Re: [Xen-devel] [PATCH 6/8] x86: (command line option to) avoid use of secondary hyper-threads


  • To: Jan Beulich <JBeulich@xxxxxxxx>
  • From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
  • Date: Mon, 16 Jul 2018 13:37:53 +0100
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  • Cc: George Dunlap <George.Dunlap@xxxxxxxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Brian Woods <brian.woods@xxxxxxx>, Suravee Suthikulpanit <suravee.suthikulpanit@xxxxxxx>, Dario Faggioli <dfaggioli@xxxxxxxx>
  • Delivery-date: Mon, 16 Jul 2018 12:40:04 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
  • Openpgp: preference=signencrypt

On 13/07/18 09:13, Jan Beulich wrote:
>>>> On 12.07.18 at 17:45, <andrew.cooper3@xxxxxxxxxx> wrote:
>> On 11/07/18 13:10, Jan Beulich wrote:
>>> --- a/docs/misc/xen-command-line.markdown
>>> +++ b/docs/misc/xen-command-line.markdown
>>> @@ -1040,6 +1040,13 @@ identical to the boot CPU will be parked
>>>  ### hpetbroadcast (x86)
>>>  > `= <boolean>`
>>>  
>>> +### ht (x86)
>> I'd suggest smt rather than ht here.  SMT is the technical term, while
>> HT is Intel's marketing name.
> Hmm, many BIOSes (if the have such an option) talk about HT, which
> to me makes "ht" a closer match. How about we allow both?

That's because a BIOS is custom to the hardware it runs on.

Have you tried setting up an alias before? (given the specific
deficiency of the *_param() infrastructure in this area)  I'm don't
think an alias is worth the effort.

~Andrew

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