From: Paolo Bonzini <pbonzini@redhat.com>
To: Wanpeng Li <kernellwp@gmail.com>,
Avi Kivity <avi.kivity@gmail.com>, Gleb Natapov <gleb@kernel.org>
Cc: Andy Lutomirski <luto@amacapital.net>, kvm list <kvm@vger.kernel.org>
Subject: Re: Seeking a KVM benchmark
Date: Mon, 17 Nov 2014 12:18:12 +0100 [thread overview]
Message-ID: <5469D974.4030008@redhat.com> (raw)
In-Reply-To: <5469D934.4080405@gmail.com>
On 17/11/2014 12:17, Wanpeng Li wrote:
>>
>>> It's not surprising [1]. Since the meaning of some PTE bits change [2],
>>> the TLB has to be flushed. In VMX we have VPIDs, so we only need to flush
>>> if EFER changed between two invocations of the same VPID, which isn't
>>> the case.
>
> If there need a TLB flush if guest is UP?
The wrmsr is in the host, and the TLB flush is done in the processor
microcode.
Paolo
next prev parent reply other threads:[~2014-11-17 11:18 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-07 6:27 Seeking a KVM benchmark Andy Lutomirski
2014-11-07 7:17 ` Paolo Bonzini
2014-11-07 17:59 ` Andy Lutomirski
2014-11-07 18:11 ` Andy Lutomirski
2014-11-08 12:01 ` Gleb Natapov
2014-11-08 16:00 ` Andy Lutomirski
2014-11-08 16:44 ` Andy Lutomirski
2014-11-09 8:52 ` Gleb Natapov
2014-11-09 16:36 ` Andy Lutomirski
2014-11-10 10:03 ` Paolo Bonzini
2014-11-10 10:45 ` Gleb Natapov
2014-11-10 12:15 ` Paolo Bonzini
2014-11-10 14:23 ` Avi Kivity
2014-11-10 17:28 ` Paolo Bonzini
2014-11-10 17:38 ` Gleb Natapov
2014-11-12 11:33 ` Paolo Bonzini
2014-11-12 15:22 ` Gleb Natapov
2014-11-12 15:26 ` Paolo Bonzini
2014-11-12 15:32 ` Gleb Natapov
2014-11-12 15:51 ` Paolo Bonzini
2014-11-12 16:07 ` Andy Lutomirski
2014-11-12 17:56 ` Paolo Bonzini
2014-11-17 11:17 ` Wanpeng Li
2014-11-17 11:18 ` Paolo Bonzini [this message]
2014-11-17 12:00 ` Wanpeng Li
2014-11-17 12:04 ` Paolo Bonzini
2014-11-17 12:14 ` Wanpeng Li
2014-11-17 12:22 ` Paolo Bonzini
2014-11-11 11:07 ` Paolo Bonzini
2014-11-10 19:17 ` Andy Lutomirski
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