From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linutronix.de (146.0.238.70:993) by crypto-ml.lab.linutronix.de with IMAP4-SSL for ; 20 Jun 2018 20:00:24 -0000 Received: from mga14.intel.com ([192.55.52.115]) by Galois.linutronix.de with esmtps (TLS1.2:DHE_RSA_AES_256_CBC_SHA256:256) (Exim 4.80) (envelope-from ) id 1fVjHD-000348-92 for speck@linutronix.de; Wed, 20 Jun 2018 22:00:23 +0200 Subject: [MODERATED] Re: [patch V2 05/12] cpu/hotplug: Provide knob to control SMT References: <20180606192714.754943543@linutronix.de> <20180606192807.337089954@linutronix.de> From: Dave Hansen Message-ID: <3644dbc5-61e2-d67a-2d00-0bb2185b1850@linux.intel.com> Date: Wed, 20 Jun 2018 13:00:16 -0700 MIME-Version: 1.0 In-Reply-To: <20180606192807.337089954@linutronix.de> Content-Type: multipart/mixed; boundary="ILSHG8XNVG2BT9s5Sl3NMk3q7fY90oUml"; protected-headers="v1" To: speck@linutronix.de List-ID: This is an OpenPGP/MIME encrypted message (RFC 4880 and 3156) --ILSHG8XNVG2BT9s5Sl3NMk3q7fY90oUml Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 06/06/2018 12:27 PM, speck for Thomas Gleixner wrote: > +What: /sys/devices/system/cpu/smt > + /sys/devices/system/cpu/smt/active > + /sys/devices/system/cpu/smt/control > +Date: June 2018 > +Contact: Linux kernel mailing list > +Description: Control Symetric Multi Threading (SMT) > + > + active: Tells whether SMT is active (enabled and available) Just to be clear: "enabled and available" does not necessarily mean that we have any HT threads *online*, it just means that we *might* have one come online. Right? --ILSHG8XNVG2BT9s5Sl3NMk3q7fY90oUml--