Re: 2.6.25 slow boot/reboot
From: Ingo Molnar
Date: Tue Apr 29 2008 - 10:28:52 EST
* Glauber Costa <gcosta@xxxxxxxxxx> wrote:
> [ 1.375711] Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ
> sharing enabled
> [ 4.399907] floppy0: no floppy controllers found
>
> a 90-second delay is not what's happening, or at least, not what the
> kernel is seeing. So my bet would be something clock-related. Probably
> the system's clocksource is not running the time correctly, which is
> causing system events to be delayed. I fail to see, however, how does
> the patch you bisected to influences this. Ingo, do you have any idea?
the first thing to check, does latest x86.git work fine:
http://people.redhat.com/mingo/x86.git/README
? We've got fixes queued up - in particular one could result in 'slow'
systems by virtue of denying an ioremap():
Subject: revert: "x86: ioremap(), extend check to all RAM pages"
maybe the bisection went haywire.
Or the secondary core booted up in such a sucky way that it causes such
massive slowdowns? Perhaps we are flooding the system with local APIC
timer interrupts or other interrupts?
Ingo
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