> Rafael J. Wysocki wrote:
> > On Tuesday, 22 of April 2008, Justin Mattock wrote:
> >> On Tue, Apr 22, 2008 at 1:49 PM, Kasper Sandberg <lkml@metanurb.dk> wrote:
> >>> On Tue, 2008-04-22 at 06:10 +0000, Justin Mattock wrote:
> >>> > On Tue, Apr 22, 2008 at 5:21 AM, Jacek Luczak <difrost.kernel@gmail.com> wrote:
> >>> > > Hi,
> >>> > >
> >>> > >
> >>> > > > Hello;
> >>> > > > with the latest git on a macbook the system can barely boot without
> >>> > > > freezing, a work around for me at leat is either disable smp, or once
> >>> > > > booted turn on glxgears,or compiling the kernel i.g. when using the
> >>> > > > processors I'm not receiving a freeze, only when everything starts
> >>> > > > lowering down. in dmesg I'm noticing BIOS bug, APIC version is 0 for
> >>> > > > CPU#0! fixing up to 0x10. (tell you're hw vendor) could this be the
> >>> > > > reason for the system freezes?,
> >>> > >
> >>> > > I don't think so. On my machine there's no freezes with latest git and:
> >>> > > ACPI: LAPIC (acpi_id[0x00] lapic_id[0x00] enabled)
> >>> > > BIOS bug, APIC version is 0 for CPU#0! fixing up to 0x10. (tell your hw vendor)
> >>> > > ACPI: LAPIC (acpi_id[0x01] lapic_id[0x01] enabled)
> >>> > > BIOS bug, APIC version is 0 for CPU#0! fixing up to 0x10. (tell your hw vendor)
> >>> > >
> >>> > > I've got exactly the same messages.
> >>> >
> >>> > Are you using a macbook aswell?
> >>> >
> >>> > >
> >>> > >
> >>> > > > also I didnt have a camera handy on me
> >>> > > > but the screen spit out = Bug spinlock lockup on CPU#0
> >>> > > > swapper/0. c17fa7c0 PID 0, comm: swapper not tainted.
> >>> > >
> >>> > > Can you try to write down more of those bug messages?
> >>> >
> >>> > Yeah,
> >>> >
> >>> > >
> >>> > >
> >>> > > > I dont have a problem disabling smp, except when I cat /proc/cpuinfo I
> >>> > > > don't see anything about my cores.
> >>> > >
> >>> > > What exactly you expect to see in /proc/cpuinfp while smp is disabled?
> >>> >
> >>> > under smp I see cpu cores. disabling smp I dont see cpu cores, under
> >>> > cat /proc/cpuinfo.
> >>>
> >>> well.. SMP is kindof support for multiple processors, be it in one
> >>> socket, or multiple sockets.. without SMP you will only be able to use 1
> >>> of your X cores.
> >> Yeah disabling smp is not a good idea on a macbook pro, performace is horrible.
> >>
> >>> >
> >>> >
> >>> > >
> >>> > >
> >>> > > > I know this is a stupid question
> >>> > > > but will it hurt the system if smp is disabled
> >>> > > > for the macbook pro ati chipset.?
> >>> > >
> >>> > > No it won't.
> >>> > >
> >>> > > -Jacek
> >>> > >
> >>> >
> >>> > Cool as long as the system Is o.k. disabling smp.
> >>> It is.. but with the limitations outlined above.
> >>> > What about x86: PAT
> >>> > support is disabled. how do I enable this option?
> >>> > regards;
> >>> >
> >>>
> >>>
> >> Thanks for the feedback, well I guess this would be either a
> >> regression or a bug. I think the best would be to have somebody else
> >> with a macbook pro 15' ati chipset confirm this freezeing as well,
> >> before going out and jumping the gun, and filing a bug report.
> >> regards;
> >
> > What's the current status of this issue?
>
> I reported this issue too but got ignored .. No one of the x86 maintainer did answer my questions.
>
>
http://www.ussg.iu.edu/hypermail/linux/kernel/0805.0/1258.html
>
> However it does not do any bad on my boxes ( so far I can tell ) is just plain annoying and wrong some who since
> is *only* occurs on 32bit kernels. HW is broken or even isn't.
>
> It seems to me this issue is related to the move of generic_processor_info() and fiends to apic_32.c ( but I'm not really sure ) ,
> all I'm sure about this message was not in 2.6.25 nor in 2.6.24.
