From: Borislav Petkov <bp@alien8.de>
To: Dan Magenheimer <dan.magenheimer@oracle.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>,
Konrad Wilk <konrad.wilk@oracle.com>,
linux-acpi@vger.kernel.org, x86@kernel.org,
xen-devel@lists.xensource.com, linux-kernel@vger.kernel.org,
lenb@kernel.org
Subject: Re: [Xen-devel] Is: axe read_tscp pvops call. Was: Re: [RFC] ACPI S3 and Xen (suprisingly small\!).
Date: Thu, 18 Oct 2012 18:17:00 +0200 [thread overview]
Message-ID: <20121018161659.GA20354@x1.osrc.amd.com> (raw)
In-Reply-To: <dd8748de-4715-499a-8c7e-745af37fa6c4@default>
On Thu, Oct 18, 2012 at 08:56:40AM -0700, Dan Magenheimer wrote:
> I agree the whole idea of paravirtualization is a hack, but it is a
> hack to workaround some poor architectural design decisions many years
> ago by Intel processor designers who should have known better. Go yell
> at them.
>
> Worse, the rdtscp instruction was a poor design decision by AMD
> processor designers to hack around tsc skew problems. Go yell at them
> too.
>
> And both Intel and AMD chose to perpetuate the problem with a
> complicated VT/SVM implementation that will never perform as well as
> native. At least they tried ;-)
Looks like xen people seem to know better so maybe they should design
their own processor, add xen support for it and leave the linux kernel
alone so that both camps can finally get on with their lives.
--
Regards/Gruss,
Boris.
next prev parent reply other threads:[~2012-10-18 16:17 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-17 13:49 [RFC] ACPI S3 and Xen (suprisingly small\!) Konrad Rzeszutek Wilk
2012-10-17 13:49 ` [PATCH 1/4] x86/wakeup/sleep: Check whether the TSS GDT descriptor is empty before using it Konrad Rzeszutek Wilk
2012-10-18 0:03 ` H. Peter Anvin
2012-10-18 14:47 ` Konrad Rzeszutek Wilk
2012-10-18 15:01 ` H. Peter Anvin
2013-01-17 14:41 ` Konrad Rzeszutek Wilk
2012-10-17 13:49 ` [PATCH 2/4] xen/lowlevel: Implement pvop call for load_idt (sidt) Konrad Rzeszutek Wilk
2012-10-17 23:51 ` H. Peter Anvin
2012-10-18 14:45 ` Konrad Rzeszutek Wilk
2012-10-18 15:02 ` H. Peter Anvin
2013-01-17 14:36 ` Konrad Rzeszutek Wilk
2012-10-17 13:49 ` [PATCH 3/4] xen/lowlevel: Implement pvop call for store_gdt (gidt) Konrad Rzeszutek Wilk
2012-10-17 13:49 ` [PATCH 4/4] xen/acpi: Prep saved_context cr3 values Konrad Rzeszutek Wilk
2013-01-17 14:48 ` Konrad Rzeszutek Wilk
2012-10-17 16:03 ` [RFC] ACPI S3 and Xen (suprisingly small\!) H. Peter Anvin
2012-10-17 16:10 ` Is: axe read_tscp pvops call. Was: " Konrad Rzeszutek Wilk
2012-10-17 16:39 ` Konrad Rzeszutek Wilk
2012-10-17 16:54 ` H. Peter Anvin
2012-10-17 16:50 ` H. Peter Anvin
2012-10-17 16:54 ` Konrad Rzeszutek Wilk
2012-10-17 17:35 ` H. Peter Anvin
2012-10-18 15:22 ` [Xen-devel] " Dan Magenheimer
2012-10-18 15:28 ` H. Peter Anvin
2012-10-18 15:56 ` Dan Magenheimer
2012-10-18 16:17 ` Borislav Petkov [this message]
2012-10-18 16:44 ` Stefano Stabellini
2012-10-18 17:04 ` H. Peter Anvin
2012-10-18 16:37 ` H. Peter Anvin
2012-10-19 15:48 ` Is: Xen architecture document. Was: " Konrad Rzeszutek Wilk
2012-10-19 17:45 ` H. Peter Anvin
2012-10-18 16:31 ` David Vrabel
2012-10-18 17:42 ` Konrad Rzeszutek Wilk
2012-10-18 18:02 ` David Vrabel
2012-10-17 17:46 ` Ben Guthro
2012-10-17 17:43 ` Konrad Rzeszutek Wilk
2012-10-17 18:00 ` Ben Guthro
2012-10-19 18:49 ` Konrad Rzeszutek Wilk
2012-10-20 1:23 ` Ben Guthro
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