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From: Boris Ostrovsky <boris.ostrovsky@oracle.com>
To: Anchal Agarwal <anchalag@amazon.com>,
	"Rafael J. Wysocki" <rafael@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>,
	"Singh, Balbir" <sblbir@amazon.com>,
	"Valentin, Eduardo" <eduval@amazon.com>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"Woodhouse, David" <dwmw@amazon.co.uk>,
	"vkuznets@redhat.com" <vkuznets@redhat.com>,
	"sstabellini@kernel.org" <sstabellini@kernel.org>,
	"tglx@linutronix.de" <tglx@linutronix.de>,
	"linux-pm@vger.kernel.org" <linux-pm@vger.kernel.org>,
	"linux-mm@kvack.org" <linux-mm@kvack.org>,
	"pavel@ucw.cz" <pavel@ucw.cz>,
	"axboe@kernel.dk" <axboe@kernel.dk>,
	"x86@kernel.org" <x86@kernel.org>,
	"roger.pau@citrix.com" <roger.pau@citrix.com>,
	"hpa@zytor.com" <hpa@zytor.com>,
	"rjw@rjwysocki.net" <rjw@rjwysocki.net>,
	"mingo@redhat.com" <mingo@redhat.com>,
	"Kamata, Munehisa" <kamatam@amazon.com>,
	"bp@alien8.de" <bp@alien8.de>,
	"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
	"konrad.wilk@oracle.co" <konrad.wilk@oracle.com>,
	"len.brown@intel.com" <len.brown@intel.com>,
	"davem@davemloft.net" <davem@davemloft.net>,
	"fllinden@amaozn.com" <fllinden@amazon.com>,
	"xen-devel@lists.xenproject.org" <xen-devel@lists.xenproject.org>
Subject: Re: [RFC PATCH V2 11/11] x86: tsc: avoid system instability in hibernation
Date: Thu, 23 Jan 2020 11:27:15 -0500
Message-ID: <65ae1560-241e-de68-a68a-ffea071f5cc4@oracle.com> (raw)
In-Reply-To: <20200122200710.GA3071@dev-dsk-anchalag-2a-9c2d1d96.us-west-2.amazon.com>



On 1/22/20 3:07 PM, Anchal Agarwal wrote:
>> In this case tsc_verify_tsc_adjust(true) this does nothing as
>> feature bit X86_FEATURE_TSC_ADJUST is not available to guest. 


Is it not available to your specific guest? Because AFAICT it is
available in general (to HVM/PVH guests).


> 4. Also, the instances do not have InvariantTSC exposed.

If you specify "nomigrate=true" in your configuration file you should
have that feature enabled.


-boris


  reply index

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-07 23:45 Anchal Agarwal
2020-01-08 10:50 ` Peter Zijlstra
2020-01-10 15:35   ` Eduardo Valentin
2020-01-13 10:16     ` Peter Zijlstra
2020-01-13 11:43       ` Singh, Balbir
2020-01-13 11:48         ` Rafael J. Wysocki
2020-01-13 12:42         ` Peter Zijlstra
2020-01-13 21:50           ` Rafael J. Wysocki
2020-01-13 23:30             ` Rafael J. Wysocki
2020-01-14 19:29               ` Anchal Agarwal
2020-01-22 20:07                 ` Anchal Agarwal
2020-01-23 16:27                   ` Boris Ostrovsky [this message]
2020-01-13 13:01         ` [Xen-devel] " Andrew Cooper
2020-01-13 13:54           ` David Woodhouse
2020-01-13 15:02           ` Singh, Balbir

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