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SubjectRe: various laptop nagles - any suggestions? (note: 2.6.19-rc2-mm1 but applies to multiple kernels)
On Fri, 20 Oct 2006 22:56:51 +0200
Ingo Molnar <mingo@elte.hu> wrote:

>
> * Andrew Morton <akpm@osdl.org> wrote:
>
> > Oh. I thought the problem was that the timer stops when the CPU is
> > idle. Maybe I misremembered. I'll try `idle=poll'.
>
> hm, wouldnt in that case the box not boot at all? But yeah, idle=poll
> would be nice.

idle=poll fixes it. The fan gets a bit noisy though ;)

Perhaps a suitable test would be to set up a PIT interrupt, do a hlt, see
if the APIC timer counter has increased appropriately.




I got this:

[ 43.709238] TSC appears to be running slowly. Marking it as unstable

How come? It also happens with HIGH_RES_TIMERS=n and NO_HZ=n. It only
seems to happen when idle=poll is given.



> could you also boot with apic=verbose and send us the full bootlog?
>

http://userweb.kernel.org/~akpm/apic.txt

I gave up on waiting for it to complete initscripts.


processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 13
model name : Intel(R) Pentium(R) M processor 2.00GHz
stepping : 8
cpu MHz : 800.000
cache size : 2048 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss tm pbe nx est tm2
bogomips : 3994.15
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