Merge branch 'x86-cache-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...

[linux-2.6-block.git] / Documentation / ABI / testing / sysfs-devices-system-cpu

diff --git a/Documentation/ABI/testing/sysfs-devices-system-cpu b/Documentation/ABI/testing/sysfs-devices-system-cpu
index 49874173705507f72fac2f5f55da46fc34c3cc52..2a4a423d08e0d3ed8bce7cc0c9bcd36bb30bb19d 100644 (file)
--- a/Documentation/ABI/testing/sysfs-devices-system-cpu
+++ b/Documentation/ABI/testing/sysfs-devices-system-cpu
@@ -272,6 +272,22 @@ Description:       Parameters for the CPU cache attributes
                                     the modified cache line is written to main
                                     memory only when it is replaced
 
+
+What:          /sys/devices/system/cpu/cpu*/cache/index*/id
+Date:          September 2016
+Contact:       Linux kernel mailing list <linux-kernel@vger.kernel.org>
+Description:   Cache id
+
+               The id provides a unique number for a specific instance of
+               a cache of a particular type. E.g. there may be a level
+               3 unified cache on each socket in a server and we may
+               assign them ids 0, 1, 2, ...
+
+               Note that id value can be non-contiguous. E.g. level 1
+               caches typically exist per core, but there may not be a
+               power of two cores on a socket, so these caches may be
+               numbered 0, 1, 2, 3, 4, 5, 8, 9, 10, ...
+
 What:          /sys/devices/system/cpu/cpuX/cpufreq/throttle_stats
                /sys/devices/system/cpu/cpuX/cpufreq/throttle_stats/turbo_stat
                /sys/devices/system/cpu/cpuX/cpufreq/throttle_stats/sub_turbo_stat