From: Borislav Petkov <bp@alien8.de>
To: Igor Mammedov <imammedo@redhat.com>
Cc: linux-kernel@vger.kernel.org, x86@kernel.org, hpa@zytor.com,
mingo@redhat.com, tglx@linutronix.de, pbonzini@redhat.com,
kvm@vger.kernel.org, mtosatti@redhat.com
Subject: Re: [PATCH 1/2] x86: AMD: mark TSC unstable on APU family 15h models 10h-1fh
Date: Thu, 31 Jul 2014 17:47:47 +0200 [thread overview]
Message-ID: <20140731154747.GA7160@pd.tnic> (raw)
In-Reply-To: <1406800033-13404-2-git-send-email-imammedo@redhat.com>
On Thu, Jul 31, 2014 at 09:47:12AM +0000, Igor Mammedov wrote:
> Due to erratum #778 from
> "Revision Guide for AMD Family 15h Models 10h-1Fh Processors,
> Publication # 48931, Issue Date: May 2013, Revision: 3.10"
>
> TSC on affected processor, a core may drift under certain conditions,
> which makes initially synchronized TSCs to become unsynchronized.
Is this something you're seeing on a real system? If so, how do you
trigger this?
Thanks.
--
Regards/Gruss,
Boris.
Sent from a fat crate under my desk. Formatting is fine.
--
next prev parent reply other threads:[~2014-07-31 15:47 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-31 9:47 [PATCH 0/2] Avoid using TSC clocksource on AMD APUs affected by erratum 778 Igor Mammedov
2014-07-31 9:47 ` [PATCH 1/2] x86: AMD: mark TSC unstable on APU family 15h models 10h-1fh Igor Mammedov
2014-07-31 15:47 ` Borislav Petkov [this message]
2014-07-31 16:33 ` Paolo Bonzini
2014-08-01 9:02 ` Borislav Petkov
2014-07-31 9:47 ` [PATCH 2/2] x86: kvm: do not advertise stable clocksource if CPU has TSC drift BUG Igor Mammedov
2014-07-31 14:38 ` Paolo Bonzini
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