Re: [2.6] Missing L2-cache after warm boot
From: Jochen Hein
Date: Tue Dec 02 2003 - 08:48:04 EST
Ian Hastie <ianh@xxxxxxxxxxxxxxxxxx> 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.
>> /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.
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.
#include <~/.signature>: permission denied
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/