https://bugzilla.kernel.org/show_bug.cgi?id=207685
Bug ID: 207685
Summary: [ARM64] different CPU L3 cache size reported by
/sys/device/ and dmidecode
Product: ACPI
Version: 2.5
Kernel Version: 4.19.90
Hardware: ARM
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Config-Processors
Assignee: acpi_config-process...@kernel-bugs.osdl.org
Reporter: zhoubb.aa...@gmail.com
Regression: No
In the system, I can get the L3 cache size from two or more ways.
Firstly, I can get it from the kernel interface, such as the `lscpu` command.
Also, I can cat the file `/sys/devices/system/cpu/cpu3/cache/index3/size`.
The way above can give me the L3 cache size is 32768K.
Now if I use the `dmidecode -t cache` command, I get the L3 cache size is
24576K.
And the real size of the L3 cache is 24576K.
Why is it? who can explain it to me?
Thanks.
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