linux-kernel - Re: 2.6.27-rc8+

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Message-ID: <20081006195350.GB22097@alberich.amd.com>
Date:	Mon, 6 Oct 2008 21:53:50 +0200
From:	Andreas Herrmann <andreas.herrmann3@....com>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>
CC:	Arjan van de Ven <arjan@...radead.org>,
	linux-kernel@...r.kernel.org
Subject: Re: 2.6.27-rc8+ - first impressions

On Mon, Oct 06, 2008 at 02:28:39AM -0400, Dmitry Torokhov wrote:
> On Sun, Oct 05, 2008 at 12:10:46PM -0700, Arjan van de Ven wrote:
> > On Sun, 5 Oct 2008 14:36:25 -0400
> > Dmitry Torokhov <dmitry.torokhov@...il.com> wrote:
> > 
> > > Hi,
> > > 
> > > Lats night I loaded 2.6.27-rc8-tip for the first time on my AMD Turion
> > > 64 laptop that is normally runs with Fedora distribution kernel.
> > > Compared to 2.6.25 the thing is broken - hdparm reports about 3MB/sec
> > > speed, fans are constantly on, everything seems sluggish.
> > > 
> > > Booting with hpet=force (HPET is disabled in BIOS) hangs the box
> > > somewhere in tty_init.
> > 
> > hpet=force is a "the kernel thinks it's not wise to use, but you think
> > better"... don't do that ;(
> > 
> 
> That is not how I parse dmesg:
> 
> [    0.077927] HPET not enabled in BIOS. You might try hpet=force boot
> option
> 
> Here kernel recommends to try and enable it. If we generally don't recommed
> using 'force' I'd suggest removing the 2nd sentence from the message.

FYI.
Commit e7250b8ae3870f37f660c2f65cafcaba85e3bfd3 of tip/master is
needed to really enable hpet on SB400. I guess that patch should go
upstream asap -- and probably it's a good idea to add a check for timer
interrupt routing as well which could solve the issues on HP nx6xxx
laptops.


Regards,

Andreas


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