Writing a value to DAMON_RECLAIM and DAMON_LRU_SORT's 'enabled'
parameters turns on or off DAMON in an ansychronous way. This means the
parameter cannot be used to read the current status of them.
'kdamond_pid' parameter should be used instead for the purpose. The
documentation is easy to be read as it works in a synchronous way, so it
is a little bit confusing. It also makes the user space tooling dirty.
There's no real reason to have the asynchronous behavior, though.
Simply make the parameter works synchronously, rather than updating the
document.
The first and second patches changes the behavior of the 'enabled'
parameter for DAMON_RECLAIM and adds a selftest for the changed
behavior, respectively. Following two patches make the same changes for
DAMON_LRU_SORT.
SeongJae Park (4):
mm/damon/reclaim: enable and disable synchronously
selftests/damon: add tests for DAMON_RECLAIM's enabled parameter
mm/damon/lru_sort: enable and disable synchronously
selftests/damon: add tests for DAMON_LRU_SORT's enabled parameter
mm/damon/lru_sort.c | 51 ++++++++++------------
mm/damon/reclaim.c | 53 ++++++++++-------------
tools/testing/selftests/damon/Makefile | 1 +
tools/testing/selftests/damon/lru_sort.sh | 41 ++++++++++++++++++
tools/testing/selftests/damon/reclaim.sh | 42 ++++++++++++++++++
5 files changed, 129 insertions(+), 59 deletions(-)
create mode 100755 tools/testing/selftests/damon/lru_sort.sh
create mode 100755 tools/testing/selftests/damon/reclaim.sh
--
2.25.1
Adds simple test cases for DAMON_LRU_SORT's 'enabled' parameter. Those
tests are focusing on the synchronous behavior of DAMON_RECLAIM enabling
and disabling.
Signed-off-by: SeongJae Park <[email protected]>
---
tools/testing/selftests/damon/Makefile | 2 +-
tools/testing/selftests/damon/lru_sort.sh | 41 +++++++++++++++++++++++
2 files changed, 42 insertions(+), 1 deletion(-)
create mode 100755 tools/testing/selftests/damon/lru_sort.sh
diff --git a/tools/testing/selftests/damon/Makefile b/tools/testing/selftests/damon/Makefile
index dbbf18cb3e6b..af490acc5348 100644
--- a/tools/testing/selftests/damon/Makefile
+++ b/tools/testing/selftests/damon/Makefile
@@ -8,6 +8,6 @@ TEST_PROGS = debugfs_attrs.sh debugfs_schemes.sh debugfs_target_ids.sh
TEST_PROGS += debugfs_empty_targets.sh debugfs_huge_count_read_write.sh
TEST_PROGS += debugfs_duplicate_context_creation.sh
TEST_PROGS += sysfs.sh
-TEST_PROGS += reclaim.sh
+TEST_PROGS += reclaim.sh lru_sort.sh
include ../lib.mk
diff --git a/tools/testing/selftests/damon/lru_sort.sh b/tools/testing/selftests/damon/lru_sort.sh
new file mode 100755
index 000000000000..61b80197c896
--- /dev/null
+++ b/tools/testing/selftests/damon/lru_sort.sh
@@ -0,0 +1,41 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+
+# Kselftest framework requirement - SKIP code is 4.
+ksft_skip=4
+
+if [ $EUID -ne 0 ]
+then
+ echo "Run as root"
+ exit $ksft_skip
+fi
+
+damon_lru_sort_enabled="/sys/module/damon_lru_sort/parameters/enabled"
+if [ ! -f "$damon_lru_sort_enabled" ]
+then
+ echo "No 'enabled' file. Maybe DAMON_LRU_SORT not built"
+ exit $ksft_skip
+fi
+
+nr_kdamonds=$(pgrep kdamond | wc -l)
+if [ "$nr_kdamonds" -ne 0 ]
+then
+ echo "Another kdamond is running"
+ exit $ksft_skip
+fi
+
+echo Y > "$damon_lru_sort_enabled"
+nr_kdamonds=$(pgrep kdamond | wc -l)
+if [ "$nr_kdamonds" -ne 1 ]
+then
+ echo "kdamond is not turned on"
+ exit 1
+fi
+
+echo N > "$damon_lru_sort_enabled"
+nr_kdamonds=$(pgrep kdamond | wc -l)
+if [ "$nr_kdamonds" -ne 0 ]
+then
+ echo "kdamond is not turned off"
+ exit 1
+fi
--
2.25.1
Adds simple test cases for DAMON_RECLAIM's 'enabled' parameter. Those
tests are focusing on the synchronous behavior of DAMON_RECLAIM enabling
and disabling.
Signed-off-by: SeongJae Park <[email protected]>
---
tools/testing/selftests/damon/Makefile | 1 +
tools/testing/selftests/damon/reclaim.sh | 42 ++++++++++++++++++++++++
2 files changed, 43 insertions(+)
create mode 100755 tools/testing/selftests/damon/reclaim.sh
diff --git a/tools/testing/selftests/damon/Makefile b/tools/testing/selftests/damon/Makefile
index a1fa2eff8192..dbbf18cb3e6b 100644
--- a/tools/testing/selftests/damon/Makefile
+++ b/tools/testing/selftests/damon/Makefile
@@ -8,5 +8,6 @@ TEST_PROGS = debugfs_attrs.sh debugfs_schemes.sh debugfs_target_ids.sh
TEST_PROGS += debugfs_empty_targets.sh debugfs_huge_count_read_write.sh
TEST_PROGS += debugfs_duplicate_context_creation.sh
TEST_PROGS += sysfs.sh
+TEST_PROGS += reclaim.sh
include ../lib.mk
diff --git a/tools/testing/selftests/damon/reclaim.sh b/tools/testing/selftests/damon/reclaim.sh
new file mode 100755
index 000000000000..78dbc2334cbe
--- /dev/null
+++ b/tools/testing/selftests/damon/reclaim.sh
@@ -0,0 +1,42 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+
+# Kselftest framework requirement - SKIP code is 4.
+ksft_skip=4
+
+if [ $EUID -ne 0 ]
+then
+ echo "Run as root"
+ exit $ksft_skip
+fi
+
+damon_reclaim_enabled="/sys/module/damon_reclaim/parameters/enabled"
+if [ ! -f "$damon_reclaim_enabled" ]
+then
+ echo "No 'enabled' file. Maybe DAMON_RECLAIM not built"
+ exit $ksft_skip
+fi
+
+nr_kdamonds=$(pgrep kdamond | wc -l)
+if [ "$nr_kdamonds" -ne 0 ]
+then
+ echo "Another kdamond is running"
+ exit $ksft_skip
+fi
+
+echo Y > "$damon_reclaim_enabled"
+
+nr_kdamonds=$(pgrep kdamond | wc -l)
+if [ "$nr_kdamonds" -ne 1 ]
+then
+ echo "kdamond is not turned on"
+ exit 1
+fi
+
+echo N > "$damon_reclaim_enabled"
+nr_kdamonds=$(pgrep kdamond | wc -l)
+if [ "$nr_kdamonds" -ne 0 ]
+then
+ echo "kdamond is not turned off"
+ exit 1
+fi
--
2.25.1