RE: [PATCH v2 2/3] Documentation, ABI: Add a document entry for cache id

[Luck, Tony]

> It means one cache's id is unique in all caches with same cache index number.
> For example, in all caches with index3 (i.e. level3), cache id 0 is unique to identify
> a L3 cache. But in caches with index 0 (i.e. Level0), there is also a cache id 0.
> So cache id is unique in one index. But not unique in two different index.

> Does that make sense? I hope I express that correctly.

We use "index" rather than "level" because that is the terminology used
in /sys/devices/system/cpu/cpu*/cache/index*

E.g. on most Intel cpus you'll typically find "index0" is the L1-data cache,
"index1" is the L1-instruction cache, "index3" is the L2-unified cache and
"index4" is the L3-unified cache.

-Tony