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Date: Thu, 4 Oct 2018 14:00:43 +0200 From: Paolo Bonzini <pbonzini@...hat.com> To: Vitaly Kuznetsov <vkuznets@...hat.com>, Marcelo Tosatti <mtosatti@...hat.com> Cc: Andy Lutomirski <luto@...nel.org>, Thomas Gleixner <tglx@...utronix.de>, Radim Krcmar <rkrcmar@...hat.com>, Wanpeng Li <kernellwp@...il.com>, LKML <linux-kernel@...r.kernel.org>, X86 ML <x86@...nel.org>, Peter Zijlstra <peterz@...radead.org>, Matt Rickard <matt@...trans.com.au>, Stephen Boyd <sboyd@...nel.org>, John Stultz <john.stultz@...aro.org>, Florian Weimer <fweimer@...hat.com>, KY Srinivasan <kys@...rosoft.com>, devel@...uxdriverproject.org, Linux Virtualization <virtualization@...ts.linux-foundation.org>, Arnd Bergmann <arnd@...db.de>, Juergen Gross <jgross@...e.com> Subject: Re: [patch 00/11] x86/vdso: Cleanups, simmplifications and CLOCK_TAI support On 04/10/2018 09:54, Vitaly Kuznetsov wrote: > - Check if pure TSC can be used on SkyLake+ systems (where TSC scaling > is supported). Not if you want to migrate to pre-Skylake systems. > - Check if non-masterclock mode is still needed. E.g. HyperV's TSC page > clocksource is a single page for the whole VM, not a per-cpu thing. Can > we think that all the buggy hardware is already gone? No. :( We still get reports whenever we break 2007-2008 hardware. Paolo
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