[2.6] Missing L2-cache after warm boot

From: Jochen Hein
Date: Mon Dec 01 2003 - 09:17:59 EST



I'm running 2.6.0-test11 on an older Thinkpad 390E,
When booting into 2.6.0-test11 after running Windows2000 I get:

Dec 1 14:51:56 gswi1164 kernel: Initializing CPU#0
Dec 1 14:51:56 gswi1164 kernel: PID hash table entries: 1024 (order 10: 8192 bytes)
Dec 1 14:51:56 gswi1164 kernel: Detected 298.602 MHz processor.
Dec 1 14:51:56 gswi1164 kernel: Console: colour dummy device 80x25
Dec 1 14:51:56 gswi1164 kernel: Memory: 190848k/196544k available (2008k kernel code, 5060k reserved, 762k data, 148k init, 0k
highmem)
Dec 1 14:51:56 gswi1164 kernel: Calibrating delay loop... 587.77 BogoMIPS
Dec 1 14:51:56 gswi1164 kernel: Security Scaffold v1.0.0 initialized
Dec 1 14:51:56 gswi1164 kernel: Capability LSM initialized
Dec 1 14:51:56 gswi1164 kernel: Dentry cache hash table entries: 32768 (order: 5, 131072 bytes)
Dec 1 14:51:56 gswi1164 kernel: Inode-cache hash table entries: 16384 (order: 4, 65536 bytes)
Dec 1 14:51:56 gswi1164 kernel: Mount-cache hash table entries: 512 (order: 0, 4096 bytes)
Dec 1 14:51:56 gswi1164 kernel: CPU: L1 I cache: 16K, L1 D cache: 16K
Dec 1 14:51:56 gswi1164 kernel: Intel machine check architecture supported.
Dec 1 14:51:56 gswi1164 kernel: Intel machine check reporting enabled on CPU#0.
Dec 1 14:51:56 gswi1164 kernel: CPU: Intel Mobile Pentium II stepping 0a
Dec 1 14:51:56 gswi1164 kernel: Enabling fast FPU save and restore... done.
Dec 1 14:51:56 gswi1164 kernel: Checking 'hlt' instruction... OK.

When booting cold the boot messages are:

Dec 1 14:54:57 gswi1164 kernel: Initializing CPU#0
Dec 1 14:54:57 gswi1164 kernel: PID hash table entries: 1024 (order 10: 8192 bytes)
Dec 1 14:54:57 gswi1164 kernel: Detected 298.598 MHz processor.
Dec 1 14:54:57 gswi1164 kernel: Console: colour dummy device 80x25
Dec 1 14:54:57 gswi1164 kernel: Memory: 190848k/196544k available (2008k kernel code, 5060k reserved, 762k data, 148k init, 0k
highmem)
Dec 1 14:54:57 gswi1164 kernel: Calibrating delay loop... 587.77 BogoMIPS
Dec 1 14:54:57 gswi1164 kernel: Security Scaffold v1.0.0 initialized
Dec 1 14:54:57 gswi1164 kernel: Capability LSM initialized
Dec 1 14:54:57 gswi1164 kernel: Dentry cache hash table entries: 32768 (order: 5, 131072 bytes)
Dec 1 14:54:57 gswi1164 kernel: Inode-cache hash table entries: 16384 (order: 4, 65536 bytes)
Dec 1 14:54:57 gswi1164 kernel: Mount-cache hash table entries: 512 (order: 0, 4096 bytes)
Dec 1 14:54:57 gswi1164 kernel: CPU: L1 I cache: 16K, L1 D cache: 16K
Dec 1 14:54:57 gswi1164 kernel: CPU: L2 cache: 256K
Dec 1 14:54:57 gswi1164 kernel: Intel machine check architecture supported.
Dec 1 14:54:57 gswi1164 kernel: Intel machine check reporting enabled on CPU#0.
Dec 1 14:54:57 gswi1164 kernel: CPU: Intel Mobile Pentium II stepping 0a
Dec 1 14:54:57 gswi1164 kernel: Enabling fast FPU save and restore... done.
Dec 1 14:54:57 gswi1164 kernel: Checking 'hlt' instruction... OK.

/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
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 sep mtrr pge mca cmov pat pse36 mmx fxsr
bogomips : 587.77

Is there any way to find out, why the second level cache isn't
detected after a warm boot?

Jochen

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