linux-kernel - Re: AMD X2 unsynced TSC fix?

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Date:	Thu, 16 Nov 2006 01:45:24 +0000
From:	Sergio Monteiro Basto <sergio@...giomb.no-ip.org>
To:	Andreas Arens <ari@...on.de>
Cc:	acpi devel <linux-acpi@...r.kernel.org>, tglx@...utronix.de,
	Siddha@...r.kernel.org, Suresh B <suresh.b.siddha@...el.com>,
	Andi Kleen <ak@...e.de>, Lee Revell <rlrevell@...-job.com>,
	Chris Friesen <cfriesen@...tel.com>,
	linux-kernel <linux-kernel@...r.kernel.org>, len.brown@...el.com,
	Ingo Molnar <mingo@...e.hu>,
	Arjan van de Ven <arjan@...radead.org>,
	john stultz <johnstul@...ibm.com>
Subject: Re: AMD X2 unsynced TSC fix?

yap Andreas Arens send the patch just for me, I am sending it to the
maling lists.


On Thu, 2006-11-16 at 01:38 +0000, Sergio Monteiro Basto wrote:
> On Wed, 2006-11-15 at 19:40 +0100, Andreas Arens wrote:
> > as I see from the dmesg on the Fedora bugzilla, your acpi tables
> > don't provide an entry to the HPET timer. 
> 
> > As the VIA8237 happens to have a built-in HPET, I was able to force it
> > on using the
> > attached patch (against 2.6.18) on an X2 system with the same
> > problem, which greatly improved the system stability for me.
> 
> But I have one Intel(R) Pentium(R) D CPU 2.8 on a VIA8237
> My latest suspect of the root of the problem of my computer is not in
> Processor but in those VIAs. As you find that "don't provide an entry to
> the HPET timer on acpi tables" it match, but how do you know that ?
> I don't send DSDT on bugzilla 
> 
> 
> > The patch is hand-crafted from some older clock-tick kernel tree
> > sources I found by googling.
> > 
> > The thing is hackish and not suitable for mainline inclusion,
> > but may be useful nontheless.
> > If you find it useful, and it helps you please let me know.
> 
> I try your patch and it give me this differences on dmesg (file attach),
> detect a different timer.c but no improvement without notsc boot option
> and with notsc the computer got worst.
> 
> 
> > 
-- 
Sérgio M.B.

View attachment "2_6_18_via_8237_force_hpet_enable.diff" of type "text/x-patch" (1436 bytes)

Download attachment "smime.p7s" of type "application/x-pkcs7-signature" (2166 bytes)