From: Dario Faggioli <dfaggioli@suse.com>
To: Jan Beulich <JBeulich@suse.com>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>,
Dario Faggioli <dario.faggioli@citrix.com>,
David Woodhouse <dwmw@amazon.co.uk>,
Xen-devel <xen-devel@lists.xen.org>
Subject: Re: [PATCH v10 09/11] x86/ctxt: Issue a speculation barrier between vcpu contexts
Date: Fri, 26 Jan 2018 12:13:39 +0100 [thread overview]
Message-ID: <1516965219.15341.100.camel@suse.com> (raw)
In-Reply-To: <5A6B064C02000078001A2A68@prv-mh.provo.novell.com>
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On Fri, 2018-01-26 at 02:43 -0700, Jan Beulich wrote:
> > > > On 26.01.18 at 02:08, <dfaggioli@suse.com> wrote:
> > And in order to go and investigate this a bit further, Jan, what is
> > it
> > that you were doing when you saw what you described above? AFAIUI,
> > that's booting an HVM guest, isn't it?
>
> Yes, plus then run some arbitrary work inside it.
>
Ok. And you've seen the "spurious" migrations only/mostly during boot,
or even afterwords, while running this work?
> > How many vCPUs on how many pCPUs? Basically, I would just need a
> > confirmation that the system was not oversubscribed, but if, while
> > we're here, you can tell me the details, I'll put together an as
> > much
> > as possible similar scenario.
>
> 12 pCPU-s, HVM guest has 8 vCPU-s, Dom0 has 12 pCPU-s (but
> no other load than that caused by the guest).
>
Ok.
> If you want, I could
> bring the code I've used for monitoring into patch form and hand
> it to you.
>
If it's not a problem, and whenever you have time, yes, that would be
useful, I think.
Thanks and Regards,
Dario
--
<<This happens because I choose it to happen!>> (Raistlin Majere)
-----------------------------------------------------------------
Dario Faggioli, Ph.D, http://about.me/dario.faggioli
Software Engineer @ SUSE https://www.suse.com/
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next prev parent reply other threads:[~2018-01-26 11:13 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-24 13:12 [PATCH v10 00/11] x86: Mitigations for SP2/CVE-2017-5715/Branch Target Injection Andrew Cooper
2018-01-24 13:12 ` [PATCH v10 01/11] x86/cpuid: Handling of IBRS/IBPB, STIBP and IBRS for guests Andrew Cooper
2018-02-01 9:06 ` Jan Beulich
2018-02-01 13:53 ` Andrew Cooper
2018-01-24 13:12 ` [PATCH v10 02/11] x86/msr: Emulation of MSR_{SPEC_CTRL, PRED_CMD} " Andrew Cooper
2018-01-25 12:25 ` Jan Beulich
2018-01-24 13:12 ` [PATCH v10 03/11] x86/migrate: Move MSR_SPEC_CTRL on migrate Andrew Cooper
2018-01-24 13:12 ` [PATCH v10 04/11] x86/hvm: Permit guests direct access to MSR_{SPEC_CTRL, PRED_CMD} Andrew Cooper
2018-01-24 13:12 ` [PATCH v10 05/11] x86/entry: Organise the use of MSR_SPEC_CTRL at each entry/exit point Andrew Cooper
2018-01-25 13:08 ` Jan Beulich
2018-01-25 14:12 ` Andrew Cooper
2018-01-25 14:36 ` Jan Beulich
2018-01-25 14:46 ` Andrew Cooper
2018-01-25 15:08 ` Jan Beulich
2018-01-25 15:10 ` Andrew Cooper
2018-01-25 16:52 ` [PATCH v11 5/11] " Andrew Cooper
2018-01-24 13:12 ` [PATCH v10 06/11] x86/entry: Organise the clobbering of the RSB/RAS on entry to Xen Andrew Cooper
2018-01-25 13:19 ` Jan Beulich
2018-01-25 14:17 ` Andrew Cooper
2018-01-25 14:40 ` Jan Beulich
2018-01-25 14:44 ` Andrew Cooper
2018-01-25 14:48 ` Jan Beulich
2018-01-25 16:54 ` [PATCH v11 6/11] " Andrew Cooper
2018-01-26 12:17 ` Jan Beulich
2018-01-24 13:12 ` [PATCH v10 07/11] x86/entry: Avoid using alternatives in NMI/#MC paths Andrew Cooper
2018-01-25 13:43 ` Jan Beulich
2018-01-25 15:04 ` Andrew Cooper
2018-01-25 15:14 ` Jan Beulich
2018-01-25 15:19 ` Andrew Cooper
2018-01-25 16:17 ` Jan Beulich
2018-01-25 17:21 ` [PATCH v11 7/11] " Andrew Cooper
2018-01-26 12:23 ` Jan Beulich
2018-01-26 12:28 ` Andrew Cooper
2018-01-24 13:12 ` [PATCH v10 08/11] x86/boot: Calculate the most appropriate BTI mitigation to use Andrew Cooper
2018-01-25 13:52 ` Jan Beulich
2018-02-01 8:41 ` Jan Beulich
2018-02-01 13:58 ` Andrew Cooper
2018-01-24 13:12 ` [PATCH v10 09/11] x86/ctxt: Issue a speculation barrier between vcpu contexts Andrew Cooper
2018-01-24 13:34 ` Woodhouse, David
2018-01-24 13:49 ` Andrew Cooper
2018-01-24 14:31 ` David Woodhouse
2018-01-25 14:46 ` Konrad Rzeszutek Wilk
2018-01-25 15:57 ` Jan Beulich
2018-01-25 16:09 ` Andrew Cooper
2018-01-25 16:15 ` Andrew Cooper
2018-01-27 1:27 ` Dario Faggioli
2018-01-29 9:28 ` Jan Beulich
2018-02-05 11:37 ` George Dunlap
2018-01-25 16:31 ` Jan Beulich
2018-01-25 16:48 ` Andrew Cooper
2018-01-25 18:49 ` Dario Faggioli
2018-01-26 1:08 ` Dario Faggioli
2018-01-26 9:43 ` Jan Beulich
2018-01-26 11:13 ` Dario Faggioli [this message]
2018-01-26 11:38 ` Jan Beulich
2018-01-24 13:12 ` [PATCH v10 10/11] x86/cpuid: Offer Indirect Branch Controls to guests Andrew Cooper
2018-01-24 13:12 ` [PATCH v10 11/11] x86/idle: Clear SPEC_CTRL while idle Andrew Cooper
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