tools/vm: rename tools/vm to tools/mm

Rename tools/vm to tools/mm for being more consistent with the code and
documentation directories, and won't be confused with virtual machines.

Link: https://lkml.kernel.org/r/[e-mail]
Signed-off-by: SeongJae Park <[e-mail]>
Cc: Jonathan Corbet <[e-mail]>
Cc: Shuah Khan <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>

Documentation/admin-guide/mm/idle_page_tracking.rst

···
     are not reclaimable, he or she can filter them out using
     ``/proc/kpageflags``.
 
-The page-types tool in the tools/vm directory can be used to assist in this.
+The page-types tool in the tools/mm directory can be used to assist in this.
 If the tool is run initially with the appropriate option, it will mark all the
 queried pages as idle.  Subsequent runs of the tool can then show which pages have
 their idle flag cleared in the interim.

Documentation/admin-guide/mm/pagemap.rst

···
  * ``/proc/kpagecount``.  This file contains a 64-bit count of the number of
    times each page is mapped, indexed by PFN.
 
-The page-types tool in the tools/vm directory can be used to query the
+The page-types tool in the tools/mm directory can be used to query the
 number of times a page is mapped.
 
  * ``/proc/kpageflags``.  This file contains a 64-bit set of flags for each
···
 14 - SWAPBACKED
    The page is backed by swap/RAM.
 
-The page-types tool in the tools/vm directory can be used to query the
+The page-types tool in the tools/mm directory can be used to query the
 above flags.
 
 Using pagemap to do something useful

Documentation/mm/page_owner.rst

···
 
 1) Build user-space helper::
 
-	cd tools/vm
+	cd tools/mm
 	make page_owner_sort
 
 2) Enable page owner: add "page_owner=on" to boot cmdline.

Documentation/mm/slub.rst

···
 running the command. ``slabinfo`` can be compiled with
 ::
 
-	gcc -o slabinfo tools/vm/slabinfo.c
+	gcc -o slabinfo tools/mm/slabinfo.c
 
 Some of the modes of operation of ``slabinfo`` require that slub debugging
 be enabled on the command line. F.e. no tracking information will be

Documentation/translations/zh_CN/mm/page_owner.rst

···
 
 1) 构建用户空间的帮助::
 
-	cd tools/vm
+	cd tools/mm
 	make page_owner_sort
 
 2) 启用page owner: 添加 "page_owner=on" 到 boot cmdline.

MAINTAINERS

···
 F:	include/linux/mmzone.h
 F:	include/linux/pagewalk.h
 F:	mm/
+F:	tools/mm/
 F:	tools/testing/selftests/vm/
-F:	tools/vm/
 
 VMALLOC
 M:	Andrew Morton <[e-mail]>

mm/Kconfig.debug

···
 	  help to find bare alloc_page(s) leaks. Even if you include this
 	  feature on your build, it is disabled in default. You should pass
 	  "page_owner=on" to boot parameter in order to enable it. Eats
-	  a fair amount of memory if enabled. See tools/vm/page_owner_sort.c
+	  a fair amount of memory if enabled. See tools/mm/page_owner_sort.c
 	  for user-space helper.
 
 	  If unsure, say N.

mm/memory-failure.c

···
  * - You have a test that can be added to mce-test
  *   https://git.kernel.org/cgit/utils/cpu/mce/mce-test.git/
  * - The case actually shows up as a frequent (top 10) page state in
- *   tools/vm/page-types when running a real workload.
+ *   tools/mm/page-types when running a real workload.
  * 
  * There are several operations here with exponential complexity because
  * of unsuitable VM data structures. For example the operation to map back