Messages in this thread | | | Subject | Re: [2.6] Missing L2-cache after warm boot | From | Jochen Hein <> | Date | Tue, 02 Dec 2003 14:26:20 +0100 |
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Ian Hastie <ianh@iahastie.clara.net> writes:
> On Monday 01 Dec 2003 14:04, Jochen Hein wrote: >> I'm running 2.6.0-test11 on an older Thinkpad 390E, >> When booting into 2.6.0-test11 after running Windows2000 I get: > > Do any of the previous test releases show this problem?
-test11 is the first release running on that machine. My older TP600 destroyed its WIndows 95 so I got a replacement. Compiling a kernel takes an hour or two, so it is not much fun trying different kernels.
> How are you booting > Linux? Full warm boot via the BIOS or some loadlin kind of boot?
via BIOS, lilo in MBR
> If it's > via the BIOS then does that show the L2 cache as being present?
The BIOS doesn't tell anything, the setup doesn't have a "cache enable" or "turbo" entry.
>> When booting cold the boot messages are: > > Presumably from switch on.
Yes.
>> /proc/cpuinfo contains (after warm boot): >> processor : 0 >> vendor_id : GenuineIntel >> cpu family : 6 >> model : 6 >> model name : Mobile Pentium II >> stepping : 10 >> cpu MHz : 298.598 >> cache size : 256 KB > > And shows as 0 after warm boot?
Hm, can't say for sure, because it didn't happen again.
> My immediate thought was a BIOS problem. IBM's web site doesn't say any BIOS > updates fix L2 cache related problems, but then it doesn't seem to use > technical descriptions like that. It says the latest BIOS is 1.55 - R01_C9. > > http://www-1.ibm.com/support/docview.wss?rs=0&uid=psg1MIGR-4F3VKB&loc=en_US
I'll see what BIOS I have - it is the latest. Thanks for the hint anyway.
> Or maybe it's possible that something in MS Windows 2000 is turning off the L2 > cache and it isn't getting reactivated by the warm boot?
Is there any way to see what Windows does here? I only found a manual enable of the L2cache when using older processors.
> What happens when > you do a cold boot to Linux then reboot from there?
That is fine.
For now the system seems to be fine, even when starting from Win2k via BIOS reboot. Hmpf.
Jochen
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