Re: CPU/cache detection wrong

David L. DeGeorge
2002-10-01T01:00:52Z

I too have incorrect CPU/cache detection using 2.4.20-pre7-ac3. I seem to
recall it working correctly on 2.4.19-ac1 (this was the version in which the
ac did not get added by the patch). Anyway I have a tualatin PIII with a 512K
L2 cache. I inserted the printk in setup.c that Alan asked for earlier in
the thread and got three outputs (it's a two processor machine). I have
edited everything but the printk output and the CPU:... lines. Things are
working fine with the kernel command line cachesize=512.
David
Sep 30 12:56:02 janus kernel: Cache info byte: 01
Sep 30 12:56:02 janus kernel: Cache info byte: 02
Sep 30 12:56:02 janus kernel: Cache info byte: 03
Sep 30 12:56:02 janus kernel: Cache info byte: 00
Sep 30 12:56:02 janus kernel: Cache info byte: 00
Sep 30 12:56:02 janus last message repeated 6 times
Sep 30 12:56:02 janus kernel: Cache info byte: 83
Sep 30 12:56:02 janus kernel: Cache info byte: 08
Sep 30 12:56:02 janus kernel: Cache info byte: 04
Sep 30 12:56:02 janus kernel: Cache info byte: 0C
Sep 30 12:56:02 janus kernel: CPU: L1 I cache: 16K, L1 D cache: 16K
Sep 30 12:56:02 janus kernel: CPU: L2 cache: 256K
...........................................................
Sep 30 12:56:02 janus kernel: Cache info byte: 01
Sep 30 12:56:02 janus kernel: Cache info byte: 02
Sep 30 12:56:02 janus kernel: Cache info byte: 03
Sep 30 12:56:02 janus kernel: Cache info byte: 00
Sep 30 12:56:02 janus last message repeated 7 times
Sep 30 12:56:02 janus kernel: Cache info byte: 83
Sep 30 12:56:02 janus kernel: Cache info byte: 08
Sep 30 12:56:02 janus kernel: Cache info byte: 04
Sep 30 12:56:02 janus kernel: Cache info byte: 0C
Sep 30 12:56:02 janus kernel: CPU: L1 I cache: 16K, L1 D cache: 16K
Sep 30 12:56:02 janus kernel: CPU: L2 cache: 256K
.....................................................................................
Sep 30 12:56:02 janus kernel: Cache info byte: 01
Sep 30 12:56:02 janus kernel: Cache info byte: 02
Sep 30 12:56:02 janus kernel: Cache info byte: 03
Sep 30 12:56:02 janus kernel: Cache info byte: 00
Sep 30 12:56:02 janus last message repeated 7 times
Sep 30 12:56:02 janus kernel: Cache info byte: 83
Sep 30 12:56:02 janus kernel: Cache info byte: 08
Sep 30 12:56:02 janus kernel: Cache info byte: 04
Sep 30 12:56:02 janus kernel: Cache info byte: 0C
Sep 30 12:56:02 janus kernel: CPU: L1 I cache: 16K, L1 D cache: 16K
Sep 30 12:56:02 janus kernel: CPU: L2 cache: 256K