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-rw-r--r--Documentation/filesystems/proc.rst11
1 files changed, 9 insertions, 2 deletions
diff --git a/Documentation/filesystems/proc.rst b/Documentation/filesystems/proc.rst
index 81bfe3c800cc..dd4e3e18c22b 100644
--- a/Documentation/filesystems/proc.rst
+++ b/Documentation/filesystems/proc.rst
@@ -933,8 +933,15 @@ meminfo
~~~~~~~
Provides information about distribution and utilization of memory. This
-varies by architecture and compile options. The following is from a
-16GB PIII, which has highmem enabled. You may not have all of these fields.
+varies by architecture and compile options. Some of the counters reported
+here overlap. The memory reported by the non overlapping counters may not
+add up to the overall memory usage and the difference for some workloads
+can be substantial. In many cases there are other means to find out
+additional memory using subsystem specific interfaces, for instance
+/proc/net/sockstat for TCP memory allocations.
+
+The following is from a 16GB PIII, which has highmem enabled.
+You may not have all of these fields.
::