linux-kernel - Re: [git pull] x86/hrtimer/acpi fixes

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Message-Id: <1197056910.32023.25.camel@cmn3.stanford.edu>
Date:	Fri, 07 Dec 2007 11:48:30 -0800
From:	Fernando Lopez-Lezcano <nando@...ma.Stanford.EDU>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>, Len Brown <lenb@...nel.org>,
	Venki Pallipadi <venkatesh.pallipadi@...el.com>
Subject: Re: [git pull] x86/hrtimer/acpi fixes

On Fri, 2007-12-07 at 11:29 -0800, Fernando Lopez-Lezcano wrote:
> On Fri, 2007-12-07 at 19:59 +0100, Ingo Molnar wrote:
> > * Fernando Lopez-Lezcano <nando@...ma.Stanford.EDU> wrote:
> > 
> > > Ingo, I was about to post about timer problems in 2.6.23.9+rt12 when I 
> > > saw this. Would this be related / should I test / will this solve 
> > > everything? :-)
> > > 
> > > What I'm seeing is jack "delays" that go away if I boot with 
> > > "idle=poll", just like it was happening a long time ago. Smells like 
> > > 'time of day' glitches when the process switches cpus (this is on a 
> > > dual core intel laptop).
> > 
> > does it go away with hpet=disable as well? If yes then there could be a 
> > relation. If not then it's something else and we need to debug it.
> 
> Nope, it doesn't still getting "delay" and "xrun" messages galore. 

Attached: configuration and dmesg output booting with idle=poll,
reconfirmed that that makes the delay and xrun messages go away. 

-- Fernando


View attachment "dmesg.2" of type "text/plain" (27146 bytes)

View attachment "config-2.6.23.9-1.rt12.2.fc7.ccrmart" of type "text/plain" (80369 bytes)