with recent kernel-2.6.15-1.2054_FC5, ACPI: Invalid PBLK length [5] error warning

[Tim]

I've just noticed something with the last kernel update that I don't see
with prior kernels:  During the very early stages of writing text to the
screen at boot time, there's a message like this:

ACPI: Invalid PBLK length [5]

I don't know if this is worth worrying about.  Anybody care to comment?

It's a P4S800MX motherboard, and I don't know if the following is
pertinent:

grep CPU dmesg
Initializing CPU#0
CPU 0 irqstacks, hard=c075b000 soft=c075a000
CPU: After generic identify, caps: 3febfbff 00000000 00000000 00000000 00000000 00000000 00000000
CPU: After vendor identify, caps: 3febfbff 00000000 00000000 00000000 00000000 00000000 00000000
CPU: Trace cache: 12K uops, L1 D cache: 8K
CPU: L2 cache: 256K
CPU: After all inits, caps: 3febf3ff 00000000 00000000 00000080 00000000 00000000 00000000
Intel machine check reporting enabled on CPU#0.
CPU0: Intel P4/Xeon Extended MCE MSRs (12) available
CPU0: Thermal monitoring enabled
CPU: Intel(R) Pentium(R) 4 CPU 1.60GHz stepping 02

cat /proc/cpuinfo
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 15
model           : 1
model name      : Intel(R) Pentium(R) 4 CPU 1.60GHz
stepping        : 2
cpu MHz         : 1600.124
cache size      : 256 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 mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tmbogomips        : 3202.65

rpm -q kernel
kernel-2.6.15-1.2054_FC5    (this is the one that shows this)
kernel-2.6.17-1.2187_FC5    (no similar error)
kernel-2.6.18-1.2200.fc5    (no similar error)


On a side note.  I'm told this P4 has hyperthreading, and I see the ht
flag above.  Should I be using the SMP kernel?

I was somewhat surprised to see my BIOS offering clock speeds about two
and three times faster than the label on CPU (as above, 1.6 GHz).  The
BIOS automatically deals with clock speed, and I never expected
overclocking options THAT much faster.  I've left it at the same speed
as printed on the CPU.

-- 
(Currently running FC4, but testing FC5, if that's important.)

Don't send private replies to my address, the mailbox is ignored.
I read messages from the public lists.