Re: 2.6.25-current-git hangs on boot unless CONFIG_CPU_IDLE=n -Apple

[Carlos R. Mafra]

On Fri  4.Apr'08 at 14:10:56 +0200, Soeren Sonnenburg wrote:
> On Fri, 2008-04-04 at 08:47 -0300, Carlos R. Mafra wrote:
> > On Thu  3.Apr'08 at 20:15:02 -0700, Ray Lee wrote:
> > > On Thu, Apr 3, 2008 at 6:10 PM, Carlos R. Mafra <crmafra2@xxxxxxxxx> wrote:
> > > > On Thu  3.Apr'08 at 17:14:22 -0700, Pallipadi, Venkatesh wrote:
> > > >  > >The following report is on the current list of known regressions
> > > >  > >from 2.6.24.  Please verify if the issue is still present in the
> > > >  > >mainline.
> > > >  > >
> > > >  > >
> > > >  > >Bug-Entry    : http://bugzilla.kernel.org/show_bug.cgi?id=10093
> > > >  > >Subject              : 2.6.25-current-git hangs on boot
> > > >  > >unless CONFIG_CPU_IDLE=n - Apple
> > > >  > >Submitter    : Soeren Sonnenburg <kernel@xxxxxx>
> > > >  > >Date         : 2008-02-23 18:55 (41 days old)
> > > >  > >References   : http://lkml.org/lkml/2008/2/23/263
> > > >  > >
> > > >  > >http://marc.info/?l=linux-acpi&m=120387537018467&w=4
> > > >  > >Handled-By   : Pallipadi, Venkatesh <venkatesh.pallipadi@xxxxxxxxx>
> > > >  > >
> > > >  >
> > > >  > Last comment I saw from Soeren says it does not really hang. It waits
> > > >  > for 5-10 seconds sometimes before continuing. We are still trying to
> > > >  > narrow this down with max_cstate etc..
> > > >
> > > >  I should say that my laptop (Vaio) _hangs_ at boot (less than 10% of boots)
> > > >  and this is the last message I see:
> > > >
> > > >  "ACPI: Processor [CPU1] (supports 8 throttling states)"
> > > >
> > > >  and it stays there "forever" (more than 1 or 2 minutes at least).
> > > >
> > > >  I am not using my laptop too much these days, and I thought this
> > > >  bug had been solved because it didn't hang for the last week (but
> > > >  I boot it once per day), however it hang last night (using some
> > > >  post 2.6.25-rc7 kernel)
> > > >
> > > >  I have pictures of the screen while showing this last message at boot,
> > > >  should I post it somewhere or that is not necessary?.
> > > 
> > > If the sysrq key still works when that happens, try to do a sysrq-t,
> > > s, b to generate a trace, sync the filesystem, and reboot. If anything
> > > made it to the logs, please post it.
> > 
> > Sysrq keys don't work when it hangs, I have to push the power button.
> > 
> > Another thing to notice is that when it happens, it usually happens
> > more times in a row (like 3 times). And then it can take many boots to
> > happen again.
> > 
> > I've uploaded the picture where it hangs, it is in the very beginning
> > of the boot process:
> > 
> > http://www.ift.unesp.br/users/crmafra/dsc04673.jpg
> 
> Actually this is 
> http://bugzilla.kernel.org/show_bug.cgi?id=10117 ... and what you
> describe is exactly what I was seeing. 

Ops, I am sorry. But in the bug description which Rafael wrote above
there is a link to your original post

References: http://lkml.org/lkml/2008/2/23/263

so I thought this was the bug being dealt with here.

> However I thought that we are talking about the hang with 
> ladder governor as the last message on the screen. Anyway I am not sure
> if both bugs are related or not but I couldn't reproduce the throttling
> states bug with current mainstream...

I thought that the bug had vanished, but two days ago it happened
again in my Vaio. There were a couple of different messages comparing
to the picture in the link above, but the last message was exactly the
same.

And I see that Rafael closed the bug 
http://bugzilla.kernel.org/show_bug.cgi?id=10117

The hang two days ago was with 2.6.25-rc7-00150-g(can't remember),
do you think the bug was fixed since that kernel?

I will try to test with the latest git, but I don't have internet
access at my house anymore, so I will have to clone the git
repository into my pendrive and take it there...
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