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Subject: Re: [patch] voluntary-preempt-2.6.9-rc1-bk4-Q3
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>,
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On Sat, 2004-08-28 at 19:51, Lee Revell wrote:
> On Sat, 2004-08-28 at 17:16, Lee Revell wrote:
> > On Sat, 2004-08-28 at 17:13, Ingo Molnar wrote:
> > > ok, will add this to -Q4.
> > > 
> > 
> > Hrm, Q3 broke my PS/2 keyboard.
> > 

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.

/proc/interrupts:

           CPU0       
  0:     509819          XT-PIC  timer
  1:       1649          XT-PIC  i8042
  2:          0          XT-PIC  cascade
  8:          4          XT-PIC  rtc
 10:          0          XT-PIC  uhci_hcd, EMU10K1
 11:      24394          XT-PIC  uhci_hcd, eth0
 12:          0          XT-PIC  uhci_hcd
 14:          1          XT-PIC  ide0
 15:      12864          XT-PIC  ide1
NMI:          0 
ERR:          0

Lee