Return-Path: Received: from mail.linutronix.de (146.0.238.70:993) by crypto-ml.lab.linutronix.de with IMAP4-SSL for ; 06 Jul 2018 22:11:37 -0000 Received: from mga06.intel.com ([134.134.136.31]) by Galois.linutronix.de with esmtps (TLS1.2:DHE_RSA_AES_256_CBC_SHA256:256) (Exim 4.80) (envelope-from ) id 1fbYwx-00062z-5W for speck@linutronix.de; Sat, 07 Jul 2018 00:11:36 +0200 Date: Fri, 6 Jul 2018 15:11:28 -0700 From: Andi Kleen Subject: [MODERATED] Re: [PATCH 1/1] SMTDOC 0 Message-ID: <20180706221128.GI25550@tassilo.jf.intel.com> References: <20180705223129.9552-1-andi@firstfloor.org> <20180706205241.csbqflxqv4vym62v@treble> MIME-Version: 1.0 In-Reply-To: <20180706205241.csbqflxqv4vym62v@treble> Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit To: speck@linutronix.de List-ID: > Also, this statement will no longer be true after Jiri's patch, since > the default is l1tf=novirt, which means the L1 flushing is disabled by > default. What?!? Of course L1 flushing in KVM be always enabled. Why would you ever want to disable it? AFAIK it doesn't make much performance difference anyways. I thought novirt just means keep SMT on. Jiri? -Andi