Re: [BUG] jiffies counter leaps in 2.6.24-rc3

[Stefano Brivio]

Ok, I found out how to reliably reproduce this bug. The root session issue
was a bit weird, but I noticed I usually switch to root only when I need to
change the CPU frequency. And here's what happens:

# cpuspeedy min
[after some time...]
Nov 29 09:42:31 morte [ 4408.722597] b43-phy0 ERROR: PHY transmission error

# cpuspeedy max
Nov 29 09:42:41 morte [ 1177.238599] wmaster0: STA 00:14:c1:35:8d:eb Average rate: 540 (2160/4)

It looks like jiffies get scaled exactly by a 3.75 factor, which is
<max_frequency>/<min_frequency> here. I use acpi-cpufreq and this is my
(only) CPU:
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 13
model name      : Intel(R) Pentium(R) M processor 1.50GHz
stepping        : 6
cpu MHz         : 1500.000
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 mce cx8 sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss tm pbe bts est tm2
bogomips        : 2993.49
clflush size    : 64

Any hint?


--
Ciao
Stefano
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/