kernel: res_counter: remove the unused API

All memory accounting and limiting has been switched over to the lockless page counters. Bye, res_counter! [[email protected]: update Documentation/cgroups/memory.txt] [[email protected]: ditch the last remainings of res_counter] Signed-off-by: Johannes Weiner <[email protected]> Acked-by: Vladimir Davydov <[email protected]> Acked-by: Michal Hocko <[email protected]> Cc: Tejun Heo <[email protected]> Cc: David Rientjes <[email protected]> Cc: Paul Bolle <[email protected]> Signed-off-by: Michal Hocko <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
mrcsosa · Dec 11, 2014 · 5b1efc0 · 5b1efc0
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diff --git a/Documentation/cgroups/memory.txt b/Documentation/cgroups/memory.txt
@@ -116,16 +116,16 @@ The memory controller is the first controller developed.
 
 2.1. Design
 
-The core of the design is a counter called the res_counter. The res_counter
-tracks the current memory usage and limit of the group of processes associated
-with the controller. Each cgroup has a memory controller specific data
-structure (mem_cgroup) associated with it.
+The core of the design is a counter called the page_counter. The
+page_counter tracks the current memory usage and limit of the group of
+processes associated with the controller. Each cgroup has a memory controller
+specific data structure (mem_cgroup) associated with it.
 
 2.2. Accounting
 
 		+--------------------+
-		|  mem_cgroup     |
-		|  (res_counter)     |
+		|  mem_cgroup        |
+		|  (page_counter)    |
 		+--------------------+
 		 /            ^      \
 		/             |       \
@@ -352,9 +352,8 @@ set:
 0. Configuration
 
 a. Enable CONFIG_CGROUPS
-b. Enable CONFIG_RESOURCE_COUNTERS
-c. Enable CONFIG_MEMCG
-d. Enable CONFIG_MEMCG_SWAP (to use swap extension)
+b. Enable CONFIG_MEMCG
+c. Enable CONFIG_MEMCG_SWAP (to use swap extension)
 d. Enable CONFIG_MEMCG_KMEM (to use kmem extension)
 
 1. Prepare the cgroups (see cgroups.txt, Why are cgroups needed?)

diff --git a/Documentation/cgroups/resource_counter.txt b/Documentation/cgroups/resource_counter.txt