test: add test for anon shmem dedup

Main test features:
- Non trivial ps tree with non trivial anon shmem regions
  (no such test exists now).
- Each ps tree process continuously writes parts of anon shmem
  vmas and validates these writes after restore
  (required for dedup testing).
- Checking simultaneous changing of anon shmem contents in different
  processes.
Signed-off-by: Eugene Batalov <eabatalov89@gmail.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>

test/jenkins/criu-dedup.sh

@@ -4,8 +4,9 @@ source `dirname $0`/criu-lib.sh
 prep
 ./test/zdtm.py run --all --keep-going --report report --parallel 4 -f h --pre 2 --dedup -x maps04 -x maps007 || fail
 
-# Additionally run these two as they touch a lot of
+# Additionally run these tests as they touch a lot of
 # memory and it makes sense to additionally check it
-# with delays petween iterations
+# with delays between iterations
 ./test/zdtm.py run -t zdtm/transition/maps007 --keep-going --report report -f h --pre 8:.1 --dedup || fail
 ./test/zdtm.py run -t zdtm/static/mem-touch   --keep-going --report report -f h --pre 8:.1 --dedup || fail
+./test/zdtm.py run -t zdtm/transition/maps008 --keep-going --report report -f h --pre 8:.1 --dedup || fail

test/zdtm/transition/Makefile

@@ -15,6 +15,7 @@ TST_NOFILE	=	\
 		fork2		\
 		thread-bomb	\
 		maps007		\
+		maps008		\
 		pipe_loop00     \
 		pipe_shared00   \
 		socket_loop00   \

test/zdtm/transition/maps008.desc

+{'flavor': 'h', 'flags': 'suid'}