From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: 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 1fGu0H-0005IW-Lg for speck@linutronix.de; Fri, 11 May 2018 00:25:38 +0200 Date: Thu, 10 May 2018 15:25:33 -0700 From: Andi Kleen Subject: [MODERATED] Re: [patch V11 05/16] SSB 5 Message-ID: <20180510222533.GH13616@tassilo.jf.intel.com> References: <20180502215102.192655950@linutronix.de> <20180502215416.459915781@linutronix.de> <20180510175257.GD13616@tassilo.jf.intel.com> <20180510183058.GJ27358@char.us.oracle.com> <20180510190850.GE13616@tassilo.jf.intel.com> <20180510212232.GT27358@char.us.oracle.com> MIME-Version: 1.0 In-Reply-To: <20180510212232.GT27358@char.us.oracle.com> Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit To: speck@linutronix.de List-ID: > It is actually slower. I tried doing it last time with the spectre/meltdown > and the performance was way slower than doing it this way. I can dig up the patches > - as I think we did the tests on Broadwell but hadn't tried Skylake or such > (or maybe it was the other way around). Was this with MSR lists unconditionally, or with MSR list combined with the "wait for the first write" approach? -Andi