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Subject: Re: [patch] voluntary-preempt-2.6.9-rc1-bk4-Q4
From: Lee Revell <rlrevell@joe-job.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: Daniel Schmitt <pnambic@unu.nu>, "K.R. Foley" <kr@cybsft.com>,
       Felipe Alfaro Solana <lkml@felipe-alfaro.com>,
       linux-kernel <linux-kernel@vger.kernel.org>,
       Mark_H_Johnson@raytheon.com
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On Sun, 2004-08-29 at 01:43, Ingo Molnar wrote:
> * Lee Revell <rlrevell@joe-job.com> wrote:
> 
> > Some more info:
> > 
> > This bug is 100% reproducible.  During boot, as soon as the i8042 driver
> > is loaded:
> > 
> > serio: i8042 AUX port at 0x60,0x64 irq 12
> > serio: i8042 KBD port at 0x60,0x64 irq 1
> > input: AT Translated Set 2 keyboard on isa0060/serio0
> > 
> > the keyboard freezes, with 'Num Lock' stuck on.
> > 
> > The problem only occurs when CONFIG_PREEMPT_HARDIRQS=y.  Works fine
> > otherwise.
> 
> i suspect it's the generic_synchronize_irq() change. Does -Q4 boot?:
> 
>   http://redhat.com/~mingo/voluntary-preempt/voluntary-preempt-2.6.9-rc1-bk4-Q4
> 
> -Q4 reverts this change. (this doesnt solve the problems Scott noticed
> though.)
> 
> another solution would be to boot Q3 with preempt_hardirqs=0 and then
> turn on threading for all IRQs but the keyboard.
> 

Nope, neither of these fixes the problem.

Lee